TEAMModelOS/TEAMModelBI/Controllers/BITest/TestController.cs

using Azure.Cosmos;
using DingTalk.Api;
using DingTalk.Api.Request;
using DingTalk.Api.Response;
using HTEXLib.COMM.Helpers;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.Cosmos.Table;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Options;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using TEAMModelBI.Filter;
using TEAMModelBI.Models;
using TEAMModelBI.Tool;
using TEAMModelOS.Models;
using TEAMModelOS.SDK;//引用创建学校Code
using TEAMModelOS.SDK.Context.Attributes.Azure;
using TEAMModelOS.SDK.DI;
using TEAMModelOS.SDK.Extension;
using TEAMModelOS.SDK.Models;
using TEAMModelOS.SDK.Models.Cosmos.BI;
using TEAMModelOS.SDK.Models.Cosmos.Common;
using TEAMModelOS.SDK.Models.Service;
using TEAMModelOS.SDK.Models.Table;

//.Net 6新的特性
using System.Threading;
using System.Reflection;
using System.Numerics;
using System.Security.Cryptography;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
using System.IdentityModel.Tokens.Jwt;
using TEAMModelBI.Tool.Extension;
using System.IO;
using static TEAMModelBI.Controllers.BISchool.BatchSchoolController;
using System.Net.Http;
using System.Net.Http.Json;
using System.Net;

namespace TEAMModelBI.Controllers.BITest
{
    [Route("apitest")]
    [ApiController]
    public class TestController : ControllerBase
    {
        private readonly AzureCosmosFactory _azureCosmos;
        private readonly DingDing _dingDing;
        private readonly Option _option;
        private readonly AzureStorageFactory _azureStorage;
        private readonly IWebHostEnvironment _environment; //读取文件
        //读取配置文件
        private readonly IConfiguration _configuration;
        private readonly CoreAPIHttpService _coreAPIHttpService;
        private readonly HttpClient _httpClient;

        public TestController(AzureCosmosFactory azureCosmos, DingDing dingDing, AzureStorageFactory azureStorage, IOptionsSnapshot<Option> option, IWebHostEnvironment hostingEnvironment, IConfiguration configuration, CoreAPIHttpService coreAPIHttpService, HttpClient httpClient)
        {
            _azureCosmos = azureCosmos;
            _dingDing = dingDing;
            _azureStorage = azureStorage;
            _option = option?.Value;
            _environment = hostingEnvironment;
            _configuration = configuration;
            _coreAPIHttpService = coreAPIHttpService;
            _httpClient = httpClient;
        }

        /// <summary>
        /// 删除册别，删除章节  创区
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [HttpPost("del-standard")]
        public async Task<IActionResult> DelStandard(JsonElement jsonElement)
        {
            if (!jsonElement.TryGetProperty("oldStandard", out JsonElement _oldStandard)) return BadRequest();
            var cosmosClient = _azureCosmos.GetCosmosClient();

            List<string> abilityIds = new List<string>();  //册别的ID集合

            //查询册别信息
            await foreach (var tempAbility in cosmosClient.GetContainer(Constant.TEAMModelOS, "Normal").GetItemQueryIterator<Ability>(queryText: $"select value(c) from c", requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey($"Ability-{_oldStandard}") }))
            {
                abilityIds.Add(tempAbility.id);  //查询出来册别ID添加册别ID集合
            }
            //删除册别
            if (abilityIds.IsNotEmpty())
            {
                var sresponse = await cosmosClient.GetContainer(Constant.TEAMModelOS, "Normal").DeleteItemsStreamAsync(abilityIds, $"Ability-{_oldStandard}");
            }

            List<string> abilityTaskIds = new List<string>();  //章节ID集合

            await foreach (var item in cosmosClient.GetContainer(Constant.TEAMModelOS, "Normal").GetItemQueryIterator<AbilityTask>(queryText: $"select value(c) from c", requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey($"AbilityTask-{_oldStandard}") }))
            {
                abilityTaskIds.Add(item.id);   //查询出来的章节信息ID添加到战绩集合
            }
            //删除章节
            if (abilityTaskIds.IsNotEmpty())
            {
                var sresponse = await cosmosClient.GetContainer(Constant.TEAMModelOS, "Normal").DeleteItemsStreamAsync(abilityTaskIds, $"AbilityTask-{_oldStandard}");
            }

            return Ok(new { state = 200 });
        }

        /// <summary>
        /// 测试生产Code
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [ProducesDefaultResponseType]
        [HttpPost("get-schoolcode")]
        public async Task<IActionResult> GetSchoolCode(JsonElement jsonElement)
        {
            //string data = await SchoolCode.GenerateSchoolCode(jsonElement, _dingDing, _environment).ToString();
            CreateSchoolInfo createSchoolInfo = new CreateSchoolInfo();
            createSchoolInfo.province = "四川省";
            createSchoolInfo.id = "tmdplc";
            createSchoolInfo.name = "醍摩豆批量创校学校";
            createSchoolInfo.city = "成都市";
            createSchoolInfo.aname = "";
            createSchoolInfo.createCount = 0;

            //Random random = new Random();
            ////随机小写字母
            //int a = random.Next(0, 26);
            //char ch = (char)('a' + a);
            //string Number = GenerateRandom.Number(1);
            //string Number1 = GenerateRandom.Number(1, true);
            //string Str = GenerateRandom.Str(1);
            //string Str1 = GenerateRandom.Str(1, true);
            //string Str_char = GenerateRandom.Str_char(1);
            //string Str_char1 = GenerateRandom.Str_char(1, true);

            CreateSchoolInfo data = await SchoolCode.GenerateSchoolCode(createSchoolInfo, _dingDing, _environment);
            return Ok(new { state = 200, data, data.id });
        }

        /// <summary>
        /// 保存日志文件
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [ProducesDefaultResponseType]
        [AuthToken(Roles = "assist")]
        [HttpPost("set-savebilog")]
        public async Task<IActionResult> SetTestSaveBIlog(JsonElement jsonElement)
        {
            var (_tmdId, _tmdName, pic, did, dname, dpic) = HttpJwtAnalysis.JwtXAuthBI(HttpContext.GetXAuth("AuthToken"), _option);
            await _azureStorage.SaveLog(type: "table-save", msg: "测试保存方法01", dingDing: _dingDing, httpContext: HttpContext); //IES5 日志记录
            await _azureStorage.SaveBILog("Test-add", $"{_tmdName}【{_tmdId}】删除册别，删除ID:", _dingDing, httpContext: HttpContext);//BI 日志记录

            return Ok(new { state = 200 });
        }

        /// <summary>
        /// 查询table数据
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [HttpPost("file-table")]
        public async Task<IActionResult> SaveTable(JsonElement jsonElement)
        {
            jsonElement.TryGetProperty("single", out JsonElement single);
            jsonElement.TryGetProperty("startDate", out JsonElement startDate);
            jsonElement.TryGetProperty("endDate", out JsonElement endDate);
            jsonElement.TryGetProperty("platform", out JsonElement platform);

            List<string> strlist = new List<string>();
            if (!string.IsNullOrEmpty($"{single}"))
                strlist.Add($"RowKey {QueryComparisons.Equal} {single}");
            if (!string.IsNullOrEmpty($"{startDate}"))
                strlist.Add($"RowKey {QueryComparisons.GreaterThanOrEqual} {startDate}");
            if (!string.IsNullOrEmpty($"{endDate}"))
                strlist.Add($"RowKey {QueryComparisons.LessThanOrEqual} {endDate}");
            if (!string.IsNullOrEmpty($"{platform}"))
                strlist.Add($"platform {QueryComparisons.Equal} {platform}");

            var table = _azureStorage.GetCloudTableClient().GetTableReference("BIOptLog");
            string sql = string.Join(" and ", strlist);
            var temp = table.QueryWhereString<BIOptLog>(sql);

            return Ok(new { state = 200, temp });
        }

        /// <summary>
        /// 查询BI操作记录
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [HttpPost("get-operatelogbydate")]
        public async Task<IActionResult> GetOperateLogByDate(JsonElement jsonElement)
        {
            try
            {
                jsonElement.TryGetProperty("single", out JsonElement single);
                jsonElement.TryGetProperty("startDate", out JsonElement startDate);
                jsonElement.TryGetProperty("endDate", out JsonElement endDate);
                jsonElement.TryGetProperty("platform", out JsonElement platform);

                List<BIOptLog> operateLogs = new();
                StringBuilder tableSql = new();

                if (!string.IsNullOrEmpty($"{single}"))
                    tableSql.Append($"RowKey {QueryComparisons.Equal} '{single}' ");
                if (!string.IsNullOrEmpty($"{startDate}"))
                    tableSql.Append(!string.IsNullOrEmpty(tableSql.ToString()) ? $" {TableOperators.And} RowKey {QueryComparisons.GreaterThanOrEqual} '{startDate}' " : $"RowKey {QueryComparisons.GreaterThanOrEqual} '{startDate}' ");
                if (!string.IsNullOrEmpty($"{endDate}"))
                    tableSql.Append(!string.IsNullOrEmpty(tableSql.ToString()) ? $" {TableOperators.And} RowKey {QueryComparisons.LessThanOrEqual} '{endDate}' " : $" RowKey { QueryComparisons.LessThanOrEqual} '{endDate}' ");
                if (!string.IsNullOrEmpty($"{platform}"))
                    tableSql.Append(!string.IsNullOrEmpty(tableSql.ToString()) ? $" {TableOperators.And} platform {QueryComparisons.Equal} '{platform}' " : $" platform {QueryComparisons.Equal} '{platform}' ");

                var table = _azureStorage.GetCloudTableClient().GetTableReference("BIOptLog");
                operateLogs = await table.QueryWhereString<BIOptLog>(tableSql.ToString());
                return Ok(new { state = 200, operateLogs });
            }
            catch (Exception ex)
            {
                await _dingDing.SendBotMsg($"BI，{_option.Location}   /operatelog/get-operatelogbydate  \n  {ex.Message}{ex.StackTrace}", GroupNames.成都开发測試群組);
                return BadRequest();
            }
        }

        /// <summary>
        /// 查询离职信息
        /// </summary>
        /// <returns></returns>
        [ProducesDefaultResponseType]
        [HttpPost("quitstaff")]
        public async Task<IActionResult> QuitStaff()
        {
            string appKey = _configuration["DingDingAuth:appKey"];
            string appSecret = _configuration["DingDingAuth:appSecret"];
            string agentld = _configuration["DingDingAuth:Agentld"];

            //获取access_token
            IDingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/gettoken");
            OapiGettokenRequest request = new OapiGettokenRequest() { Appkey = appKey, Appsecret = appSecret };
            request.SetHttpMethod("Get");
            OapiGettokenResponse response = client.Execute(request);
            if (response.IsError)
            {
                return BadRequest();
            }

            //access_token的有效期为7200秒（2小时），有效期内重复获取会返回相同结果并自动续期，过期后获取会返回新的access_token
            string access_token = response.AccessToken;
            
            IDingTalkClient quitStaffClient = new DefaultDingTalkClient("https://oapi.dingtalk.com/topapi/smartwork/hrm/employee/querydimission");
            OapiSmartworkHrmEmployeeQuerydimissionRequest reqDimission = new OapiSmartworkHrmEmployeeQuerydimissionRequest() { Offset = 0L, Size = 50L };
            OapiSmartworkHrmEmployeeQuerydimissionResponse rspDimission = quitStaffClient.Execute(reqDimission, access_token);

            if (rspDimission.SubErrCode == "60011")
            {
                return Ok(new { state = 60011, message = "没有调用该接口的权限！" });
            }
            else if (rspDimission.Result != null)
            {
                var datalist = rspDimission.Result.DataList;
                return Ok(new { state = 200, datalist });
            }
            else
            {
                return Ok(new { state = rspDimission.SubErrCode, message = rspDimission.Errmsg });
            }
        }

        /// <summary>
        /// 测试获取待入职人员的userId接口
        /// </summary>
        /// <returns></returns>
        [ProducesDefaultResponseType]
        [HttpPost("Induction")]
        public async Task<IActionResult> Induction()
        {
            string appKey = _configuration["DingDingAuth:appKey"];
            string appSecret = _configuration["DingDingAuth:appSecret"];
            string agentld = _configuration["DingDingAuth:Agentld"];

            //获取access_token
            IDingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/gettoken");
            OapiGettokenRequest request = new OapiGettokenRequest() { Appkey = appKey, Appsecret = appSecret };
            request.SetHttpMethod("Get");
            OapiGettokenResponse response = client.Execute(request);
            if (response.IsError)
            {
                return BadRequest();
            }

            //access_token的有效期为7200秒（2小时），有效期内重复获取会返回相同结果并自动续期，过期后获取会返回新的access_token
            string access_token = response.AccessToken;

            IDingTalkClient InductionClient = new DefaultDingTalkClient("https://oapi.dingtalk.com/topapi/smartwork/hrm/employee/querypreentry");
            OapiSmartworkHrmEmployeeQuerypreentryRequest reqInduction = new OapiSmartworkHrmEmployeeQuerypreentryRequest() { Offset = 0L, Size = 50 };
            reqInduction.SetHttpMethod("GET");
            OapiSmartworkHrmEmployeeQuerypreentryResponse rspInduction = InductionClient.Execute(reqInduction, access_token);
            if (rspInduction.Result.DataList != null)
            {
                foreach (var itemId in rspInduction.Result.DataList)
                {
                    IDingTalkClient client3 = new DefaultDingTalkClient("https://oapi.dingtalk.com/topapi/v2/user/get");
                    OapiV2UserGetRequest v2GetRequest = new OapiV2UserGetRequest()
                    {
                        Userid = itemId,
                        Language = "zh_CN"
                    };
                    OapiV2UserGetResponse v2GetResponse = client3.Execute(v2GetRequest, access_token);

                }
                return Ok(new { state = 200, rspInduction.Result.DataList });
            }
            else
            {
                return Ok(new { state = 400, rspInduction.SubErrCode, rspInduction.SubErrMsg });
            }

        }

        /// <summary>
        /// 获取在职ID
        /// </summary>
        /// <returns></returns>
        [HttpPost("get-onthejob")]
        public async Task<IActionResult> GetOnTheJob() 
        {

            string appKey = _configuration["DingDingAuth:appKey"];
            string appSecret = _configuration["DingDingAuth:appSecret"];
            string agentld = _configuration["DingDingAuth:Agentld"];

            //获取access_token
            IDingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/gettoken");
            OapiGettokenRequest request = new OapiGettokenRequest() { Appkey = appKey, Appsecret = appSecret };
            request.SetHttpMethod("Get");
            OapiGettokenResponse response = client.Execute(request);
            if (response.IsError)
            {
                return BadRequest();
            }

            //access_token的有效期为7200秒（2小时），有效期内重复获取会返回相同结果并自动续期，过期后获取会返回新的access_token
            string access_token = response.AccessToken;

            //bool vars = false;
            //long offst = 1;
            //do
            //{
            //    IDingTalkClient jobclient = new DefaultDingTalkClient("https://oapi.dingtalk.com/topapi/smartwork/hrm/employee/queryonjob");
            //    OapiSmartworkHrmEmployeeQueryonjobRequest jobreq = new OapiSmartworkHrmEmployeeQueryonjobRequest { StatusList = "2,3,-1", Offset = offst, Size = 50 };   //2：试用期 3：正式 5：待离职 -1：无状态
            //    OapiSmartworkHrmEmployeeQueryonjobResponse jobrsp = jobclient.Execute(jobreq, access_token);

            //    if (jobrsp.Result.NextCursor > 0)
            //        offst += 1;
            //    else vars = true;
            //} while (vars);

            IDingTalkClient jobclient = new DefaultDingTalkClient("https://oapi.dingtalk.com/topapi/smartwork/hrm/employee/queryonjob");
            OapiSmartworkHrmEmployeeQueryonjobRequest jobreq = new OapiSmartworkHrmEmployeeQueryonjobRequest { StatusList = "2,3,-1", Offset = 1, Size = 50 };   //2：试用期 3：正式 5：待离职 -1：无状态
            OapiSmartworkHrmEmployeeQueryonjobResponse jobrsp = jobclient.Execute(jobreq, access_token);
            if (jobrsp.SubErrCode == "60011")
            {
                return Ok(new { state = 200, msg = jobrsp.SubErrMsg });
            }
                foreach (var item in jobrsp.Result.DataList)
                {
                    
                }

            var ser = jobrsp.Result.DataList;  // jobrsp.Body.GetEnumerator("result");

            return Ok(new { state = 200, jobrsp.Body, ser });
        }

        /// <summary>
        /// 测试 使用yield 优化
        /// 依据学校编号查询学校信息；若是没有传学校编号，则查询所有学校信息
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [ProducesDefaultResponseType]
        [HttpPost("get-schoolsinfo")]
        public async Task<IActionResult> GetSchoolsInfo(JsonElement jsonElement)
        {
            try
            {
                jsonElement.TryGetProperty("schoolCode", out JsonElement _schoolCode);
                var cosmosClient = _azureCosmos.GetCosmosClient();
                List<AssistSchool> schoolAssists = new();
                //StringBuilder stringBuilder = new StringBuilder("select value(c) from c");
                StringBuilder stringBuilder = new StringBuilder("select c.id,c.code,c.schoolCode,c.name,c.region,c.province,c.city,c.dist,c.size,c.address,c.picture,c.type,c.scale,c.areaId,c.standard from c");

                if (!string.IsNullOrEmpty($"{_schoolCode}"))
                {
                    stringBuilder.Append($" where c.id='{_schoolCode}'");
                }

                //await foreach (var itemSchool in cosmosClient.GetContainer(Constant.TEAMModelOS, "School").GetItemQueryIterator<School>(queryText: stringBuilder.ToString(), requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey("Base") }))
                //{
                //    SchoolAssist schoolAssist = new()
                //    {
                //        id = itemSchool.id,
                //        code = itemSchool.code,
                //        schoolCode = itemSchool.schoolCode,
                //        name = itemSchool.name,
                //        region = itemSchool.region,
                //        province = itemSchool.province,
                //        city = itemSchool.city,
                //        dist = itemSchool.dist,
                //        size = itemSchool.size,
                //        address = itemSchool.address,
                //        picture = itemSchool.picture,
                //        type = itemSchool.type,
                //        scale = itemSchool.scale,
                //        areaId = itemSchool.areaId,
                //        standard = itemSchool.standard
                //    };

                //    var response = await cosmosClient.GetContainer("TEAMModelOS", "School").ReadItemStreamAsync(itemSchool.id, new PartitionKey("ProductSum"));
                //    if (response.Status == 200)
                //    {
                //        using var json = await JsonDocument.ParseAsync(response.ContentStream);
                //        schoolAssist.serial = json.RootElement.GetProperty("serial").GetArrayLength();
                //        schoolAssist.service = json.RootElement.GetProperty("service").GetArrayLength();
                //        schoolAssist.hard = json.RootElement.GetProperty("hard").GetArrayLength();
                //    }

                //    schoolAssist.assists = await CommonFind.FindSchoolRoles(cosmosClient, itemSchool.id, "assist");

                //    schoolAssists.Add(schoolAssist);
                //}
                //return Ok(new { state = 200, schoolAssists });

                await foreach (var itemSchool in cosmosClient.GetContainer("TEAMModelOS", "School").GetItemQueryStreamIterator(queryText: stringBuilder.ToString(), requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey("Base") }))
                {
                    using var jsonSchool = await JsonDocument.ParseAsync(itemSchool.ContentStream);
                    foreach (var objSchool in jsonSchool.RootElement.GetProperty("Documents").EnumerateArray())
                    {
                        var schoolId = objSchool.GetProperty("id").GetString();
                        AssistSchool schoolAssist = new()
                        {
                            id = schoolId,
                            code = objSchool.GetProperty("code").GetString(),
                            schoolCode = objSchool.GetProperty("schoolCode").GetString(),
                            name = objSchool.GetProperty("name").GetString(),
                            region = objSchool.GetProperty("region").GetString(),
                            province = objSchool.GetProperty("province").GetString(),
                            city = objSchool.GetProperty("city").GetString(),
                            dist = objSchool.GetProperty("dist").GetString(),
                            size = objSchool.GetProperty("size").GetInt32(),
                            address = objSchool.GetProperty("address").GetString(),
                            picture = objSchool.GetProperty("picture").GetString(),
                            type = objSchool.GetProperty("type").GetInt32(),
                            //scale = objSchool.GetProperty("scale").GetInt32(),
                            areaId = objSchool.GetProperty("areaId").GetString(),
                            standard = objSchool.GetProperty("standard").GetString(),
                        };

                        try { schoolAssist.scale = objSchool.GetProperty("scale").GetInt32(); }
                        catch { schoolAssist.scale = 0; }

                        //var response = await cosmosClient.GetContainer("TEAMModelOS", "School").ReadItemStreamAsync(schoolId, new PartitionKey("ProductSum"));
                        //if (response.Status == 200)
                        //{
                        //    using var json = await JsonDocument.ParseAsync(response.ContentStream);
                        //    schoolAssist.serial = json.RootElement.GetProperty("serial").GetArrayLength();
                        //    schoolAssist.service = json.RootElement.GetProperty("service").GetArrayLength();
                        //    schoolAssist.hard = json.RootElement.GetProperty("hard").GetArrayLength();
                        //}

                        //schoolAssist.assists = await CommonFind.FindSchoolRoles(cosmosClient, schoolId, "assist");
                        schoolAssists.Add(schoolAssist);
                    }
                }

                List<AssistSchool> tempSchoolAssists = new();
                await foreach (var temp in GetSchools(cosmosClient, schoolAssists))
                {
                    tempSchoolAssists.AddRange(temp);
                }

                return Ok(new { state = 200, schoolAssists = tempSchoolAssists });

            }
            catch (Exception ex)
            {
                await _dingDing.SendBotMsg($"BI,{_option.Location}  /batchschool/get-schoolsinfo  \n {ex.Message}{ex.StackTrace}", GroupNames.成都开发測試群組);
                return BadRequest();
            }
        }

        /// <summary>
        /// 使用yield 优化
        /// </summary>
        /// <param name="cosmosClient"></param>
        /// <param name="schoolAssists"></param>
        /// <returns></returns>
        private async IAsyncEnumerable<List<AssistSchool>> GetSchools(CosmosClient cosmosClient, List<AssistSchool> schoolAssists)
        {
            List<AssistSchool> tempSchoolAssists = new();
            foreach (var temp in schoolAssists)
            {
                var response = await cosmosClient.GetContainer("TEAMModelOS", "School").ReadItemStreamAsync(temp.id, new PartitionKey("ProductSum"));
                if (response.Status == 200)
                {
                    using var json = await JsonDocument.ParseAsync(response.ContentStream);
                    temp.serial = json.RootElement.GetProperty("serial").GetArrayLength();
                    temp.service = json.RootElement.GetProperty("service").GetArrayLength();
                    temp.hard = json.RootElement.GetProperty("hard").GetArrayLength();
                }

                temp.assists = await CommonFind.FindSchoolRoles(cosmosClient, temp.id, "assist");
                tempSchoolAssists.Add(temp);
            }

            yield return tempSchoolAssists;
        }

        /// <summary>
        /// 赋值默认的顾问角色和BI默认的功能权限
        /// </summary>
        /// <returns></returns>
        [HttpPost("set-rolesorperm")]
        public async Task<IActionResult> SetRolesOrPermissions() 
        {
            var table = _azureStorage.GetCloudTableClient().GetTableReference("BIDDUserInfo");
            List<DingDingUserInfo> ddUserId = await table.FindListByDict<DingDingUserInfo>(new Dictionary<string, object> { { "PartitionKey", "continent" } });
            List<string> read = new() { "abilitystandard-read", "batcharea-read", "batchschool-read", "orgusers-read" };
            List<DingDingUserInfo> tempUserInfo = new();
            foreach (var user in ddUserId) 
            {
                if (string.IsNullOrEmpty(user.roles)) 
                {
                    user.roles = "assist";
                }

                if (string.IsNullOrEmpty(user.permissions)) 
                {
                    user.permissions = string.Join(",", read);
                }
                List<string> tempRead = new(user.permissions.Split(","));

                foreach (var temp in read) 
                {
                    if (!tempRead.Contains(temp)) 
                    {
                        tempRead.Add(temp);
                    }
                }
                user.permissions = string.Join(",", tempRead);
                tempUserInfo.Add(user);
            }

            var response = await table.SaveOrUpdateAll<DingDingUserInfo>(tempUserInfo);

            return Ok(new { state = 200, response });
        }

        /// <summary>
        /// 测试使用 CosmosDB中的COUNT 函数统计
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [HttpPost("get-count")]
        public async Task<IActionResult> GetCount(JsonElement jsonElement)
        {
            var cosmosClient = _azureCosmos.GetCosmosClient();
            List<KeyValuePair<int, int>> layerCount = new List<KeyValuePair<int, int>>();
            for (int i = 1; i <= 6; i++)
            {
                int total = 0;

                //string sqlText = $"select value(c.id) from c where c.pk='Item' and c.field={i}";
                string sqlText = $"select COUNT(c.id) AS totals from c where c.pk='Item' and c.field={i}";
                await foreach (var item in cosmosClient.GetContainer("TEAMModelOS", "School").GetItemQueryStreamIterator(queryText: sqlText, requestOptions: new QueryRequestOptions() { }))
                {
                    using var json = await JsonDocument.ParseAsync(item.ContentStream);
                    if (json.RootElement.TryGetProperty("_count", out JsonElement count) && count.GetInt32() > 0)
                    {
                        foreach (var obj in json.RootElement.GetProperty("Documents").EnumerateArray())
                        {
                            //total += obj.GetInt64();
                            total += obj.GetProperty("totals").GetInt32();
                        }
                        //total += count.GetInt64();
                    }
                }

                await foreach (var item in cosmosClient.GetContainer("TEAMModelOS", "Teacher").GetItemQueryStreamIterator(queryText: sqlText, requestOptions: new QueryRequestOptions() { }))
                {
                    using var json = await JsonDocument.ParseAsync(item.ContentStream);
                    if (json.RootElement.TryGetProperty("_count", out JsonElement count) && count.GetInt64() > 0)
                    {
                        foreach (var obj in json.RootElement.GetProperty("Documents").EnumerateArray())
                        {
                            //total += obj.GetInt64();
                            total += obj.GetProperty("totals").GetInt32();
                        }
                    }
                }

                layerCount.Add(new KeyValuePair<int, int>(i, total));
            }

            return Ok(new { state = 200, layerCount });
        }

        /// <summary>
        /// 测试算日期
        /// </summary>
        /// <returns></returns>
        [HttpPost("get-date")]
        public async Task<IActionResult> GetDate()
        {
            DateTimeOffset dateTime = DateTimeOffset.UtcNow.AddDays(0);
            int year = DateTimeOffset.UtcNow.Year;
            int month = DateTimeOffset.UtcNow.Month;

            List<string> strList = monthsOfYear("2021-1");

            var ere = DateTimeOffset.Parse("2024-02");
            var start = GetMonthStart(ere);
            var end = GetMonthEnd(ere);

            List<MonthStartEnd> endList = TimeHelper.GetYearMonthlyStartEnd10(DateTimeOffset.UtcNow.Year);
            List<MonthStartEnd> endList1 = TimeHelper.GetYearMonthlyStartEnd13(DateTimeOffset.UtcNow.Year);
            //return Ok(new { strList, dateTime, year, start, end, endList, endList1, endList2 });

            var (start1, end1) = TimeHelper.GetStartOrEnd(DateTimeOffset.UtcNow);
            var (start2, end2) = TimeHelper.GetStartOrEnd(DateTimeOffset.UtcNow,"week");
            var (start3, end3) = TimeHelper.GetStartOrEnd(DateTimeOffset.UtcNow,"month");
            var (start4, end4) = TimeHelper.GetStartOrEnd(DateTimeOffset.UtcNow, "year");

            return Ok(new { start1, end1, start2, end2, start3, end3, start4, end4 });
        }

        public static List<string> monthsOfYear(string yearMonth)
        {
            DateTime dateTime = DateTime.Parse(yearMonth);
            int year = dateTime.Year;
            int month = dateTime.Month;
            List<string> months = new List<string>();
            while (year > dateTime.Year - 1 || month > dateTime.Month) 
            {
                months.Add($"{year}-{(month < 10 ? "0" : "") + month}");
                month -= 1;
                if (month <= 0) 
                {
                    year -= 1;
                    month = 12;
                }
            }

            return months;
        }

        /// <summary>
        /// 统计一年中每月得新增校
        /// </summary>
        /// <returns></returns>
        [HttpPost("get-yearmonth")]
        public async Task<IActionResult> GetYearMonth()
        {
            var cosmosClient = _azureCosmos.GetCosmosClient();
            Dictionary<int, long> tempYear = new Dictionary<int, long>();
            List<TempSchool> tempSchools = new List<TempSchool>();
            for (int i = 1; i < 13; i++)
            {
                var start = 00022222330;
                long tempCount = 0;
                await foreach (var item in cosmosClient.GetContainer("TEAMModelOS", "School").GetItemQueryStreamIterator(queryText: $"SELECT c._ts,c.name,c.id FROM c WHERE c._ts>={start}L", requestOptions: new QueryRequestOptions() { PartitionKey = new PartitionKey("Base") }))
                {
                    using var json = await JsonDocument.ParseAsync(item.ContentStream);
                    if (json.RootElement.TryGetProperty("_count", out JsonElement count) && count.GetInt64() > 0)
                    {
                        foreach (var obj in json.RootElement.GetProperty("Documents").EnumerateArray())
                        {
                            TempSchool tempSchool = new TempSchool();
                            tempSchool.id = obj.GetProperty("id").GetString();
                            tempSchool.ts = obj.GetProperty("_ts").GetInt64();
                            tempSchool.name = obj.GetProperty("name").GetString();

                            tempSchools.Add(tempSchool);
                        }
                        tempCount += count.GetInt64();
                    }
                }
                if (tempCount != 0)
                {
                    tempYear.Add(i, tempCount);
                }
            }

            return Ok(new { state = 200, tempYear, tempSchools });
        }

        /// <summary>
        /// 测试.net 6 的一些特性
        /// </summary>
        /// <returns></returns>
        [HttpPost("get-newnet6")]
        public async Task<IActionResult> GetNewNet6()
        {
            ///PriorityQueue
            //.NET 6 新增的数据结构, PriorityQueue, 队列每个元素都有一个关联的优先级，它决定了出队顺序, 编号小的元素优先出列。
            PriorityQueue<string, int> priorityQueue = new();
            priorityQueue.Enqueue("Second", 2);
            priorityQueue.Enqueue("Fourth", 4);
            priorityQueue.Enqueue("Third 1", 3);
            priorityQueue.Enqueue("Third 2", 5);
            priorityQueue.Enqueue("First", 1);

            while (priorityQueue.Count > 0)
            {
                string item = priorityQueue.Dequeue();
                Console.WriteLine(item);
            }

            //PeriodicTimer
            //认识一个完全异步的“PeriodicTimer”, 更适合在异步场景中使用, 它有一个方法 WaitForNextTickAsync。
            //using PeriodicTimer timer = new(TimeSpan.FromSeconds(2));
            //while (await timer.WaitForNextTickAsync()) 
            //{
            //    Console.WriteLine(DateTime.UtcNow);
            //}

            //检查元素是否可为空的反射API
            var example = new Example();
            var nullabilityInfoContext = new NullabilityInfoContext();
            foreach (var propertyInfo in example.GetType().GetProperties())
            {
                var nullabilityInfo = nullabilityInfoContext.Create(propertyInfo);
                Console.WriteLine($"{propertyInfo.Name} property is {nullabilityInfo.WriteState}");
            }

            //直接通过 Environment 获取进程ID和路径。
            int processId = Environment.ProcessId;
            string path = Environment.ProcessPath;

            Console.WriteLine(processId);
            Console.WriteLine(path);

            //CSPNG 密码安全伪随机数生成器
            byte[] bytes = RandomNumberGenerator.GetBytes(300);
            Console.WriteLine(string.Join("", bytes.ToArray()));

            //Power of 2
            //.NET 6 引入了用于处理 2 的幂的新方法。

            //‘IsPow2’ 判断指定值是否为 2 的幂。
            //‘RoundUpToPowerOf2’ 将指定值四舍五入到 2 的幂
            Console.WriteLine(BitOperations.IsPow2(121));            // True
            Console.WriteLine(BitOperations.RoundUpToPowerOf2(260)); // 256

            //WaitAsync on Task 您可以更轻松地等待异步任务执行, 如果超时会抛出 “TimeoutException”
            Task operationTask = DoSomethingLongAsync();

            await operationTask.WaitAsync(TimeSpan.FromSeconds(5));

            async Task DoSomethingLongAsync()
            {
                Console.WriteLine("DoSomethingLongAsync started.");
                await Task.Delay(TimeSpan.FromSeconds(10));
                Console.WriteLine("DoSomethingLongAsync ended.");
            }

            //新的数学API
            // New methods SinCos, ReciprocalEstimate and ReciprocalSqrtEstimate
            // Simultaneously computes Sin and Cos
            (double sin, double cos) = Math.SinCos(1.57);
            Console.WriteLine($"Sin = {sin}\nCos = {cos}");

            // Computes an approximate of 1 / x
            double recEst = Math.ReciprocalEstimate(5);
            Console.WriteLine($"Reciprocal estimate = {recEst}");

            // Computes an approximate of 1 / Sqrt(x)
            double recSqrtEst = Math.ReciprocalSqrtEstimate(5);
            Console.WriteLine($"Reciprocal sqrt estimate = {recSqrtEst}");

            // New overloads
            // Min, Max, Abs, Clamp and Sign supports nint and nuint
            (nint a, nint b) = (5, 10);
            nint min = Math.Min(a, b);
            nint max = Math.Max(a, b);
            nint abs = Math.Abs(a);
            nint clamp = Math.Clamp(abs, min, max);
            nint sign = Math.Sign(a);
            Console.WriteLine($"Min = {min}\nMax = {max}\nAbs = {abs}");
            Console.WriteLine($"Clamp = {clamp}\nSign = {sign}");

            // DivRem variants return a tuple
            (int quotient, int remainder) = Math.DivRem(2, 7);
            Console.WriteLine($"Quotient = {quotient}\nRemainder = {remainder}");

            //CollectionsMarshal.GetValueRefOrNullRef
            //这个是在字典中循环或者修改结可变结构体时用, 可以减少结构的副本复制, 也可以避免字典重复进行哈希计算，这个有点晦涩难懂
            Dictionary<int, MyStruct> dictionary = new()
            {
                { 1, new MyStruct { Count = 100 } }
            };
            int key = 1;
            MyStruct values = CollectionsMarshal.GetValueRefOrNullRef(dictionary, key);
            // Returns Unsafe.NullRef<TValue>() if it doesn't exist; check using Unsafe.IsNullRef(ref value)
            if (!Unsafe.IsNullRef(ref values))
            {
                Console.WriteLine(values.Count); // Output: 100

                // Mutate in-place
                values.Count++;
                Console.WriteLine(values.Count); // Output: 101
            }

            return Ok(new { state = 200 });
        }

        /// <summary>
        /// 去重、判断
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [HttpPost("get-repeat")]
        public async Task<IActionResult> GetRepeat(JsonElement jsonElement) 
        {
            jsonElement.TryGetProperty("datetime", out JsonElement _datetime);
            Dictionary<string, string> prodict = new Dictionary<string, string>() { { "YMPCVCIM", "学情分析模组" }, { "IPDYZYLC", "智慧学校管理服务" }, { "3CLYJ6NP", "AClass ONE智慧学伴" }, { "IPALJ6NY", "数据储存服务空间" },{ "VABAJ6NV", "卷卡合一阅卷系统" } };
            var ste = prodict["IPDYZYLC"];

            List<string> str_str = new List<string>() { "12", "20", "13", "13", "14", "16" };
            List<strend> strends = new List<strend> { new strend { id = 1, name = "12", age = 20 }, new strend { id = 1, name = "13", age = 20 }, new strend { id = 2, name = "22", age = 22 }, new strend { id = 3, name = "23", age = 23 } };
            //str_str.Distinct().ToList();
            strends.Where((x, i) => strends.FindIndex(z => z.id.Equals(x.id)) == i).ToList();
            List<strend> str_strend1 = strends.Where((x, i) => strends.FindIndex(z => z.id.Equals(x.id)) == i).ToList();
            List<strend> str_strend2 = strends.GroupBy(p => p).Select(p => p.Key).ToList();//去重复

            DateTime dt = DateTime.Parse($"{_datetime}");
            int year = dt.Year;

            DateTime dt0 = new DateTime(year, 1, 1);
            int days = (dt.Date - dt0.Date).Days + 1;

            //int pydays = ((lastYear + 1) % 4 == 0 && (lastYear + 1) % 100 != 0 || (lastYear + 1) % 400 == 0) ? 366 : 365;
            int pydays = (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) ? 366 : 365;
            //int pydays = DateTimeHelper.getDays(year);

            return Ok(new { state = 200, pydays, days, strends , str_strend1, str_strend2 , ste  });
        }

        /// <summary>
        /// 计算天数
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [HttpPost("get-dateday")]
        public async Task<IActionResult> GetDateDay(JsonElement jsonElement) 
        {
            jsonElement.TryGetProperty("year", out JsonElement _year);
            jsonElement.TryGetProperty("moth", out JsonElement _moth);
            int year = int.Parse($"{_year}");
            int day = 0;
            List<int> moths = _moth.ToObject<List<int>>();
            foreach (var item in moths)
            {
                int days = 0;
                switch (item)
                {
                    case 1:
                    case 3:
                    case 5:
                    case 7:
                    case 8:
                    case 10:
                    case 12:
                        days = 31;
                        break;
                    case 4:
                    case 6:
                    case 9:
                    case 11:
                        days = 30;
                        break;

                    case 2:
                        int years = 0;
                        if (item <= 8 && item >= 3)
                            years = year;
                        else
                            years = year+1;

                        if (years % 4 == 0 && year % 100 != 0 || year % 400 == 0)                        
                            days = 29;                        
                        else
                            days = 28;
                        break;                        
                }

                day += days;
            }

            return Ok(new { state = 200, day });
            
        }
        
        /// <summary>
        /// 测试CosmosDB分页查询
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [HttpPost("get-page")]
        public async Task<IActionResult> cosmosDBPage(JsonElement jsonElement) 
        {
            if (!jsonElement.TryGetProperty("pageSize", out JsonElement pageSize)) return BadRequest();
            if (!jsonElement.TryGetProperty("endPosition", out JsonElement endPosition)) return BadRequest();
            var cosmosClient = _azureCosmos.GetCosmosClient();
            List<School> schools = new List<School>();
            //string sqlTxt = $"SELECT * FROM c where c.code='Base' order by c.id offset {endPosition} limit {pageSize}";
            string sqlTxt = $"SELECT * FROM c order by c.id offset {pageSize} limit {endPosition}";
            await foreach (var tempPage in cosmosClient.GetContainer("TEAMModelOS", "School").GetItemQueryStreamIterator(queryText: sqlTxt, requestOptions:new QueryRequestOptions { PartitionKey = new PartitionKey("Base") }))
            {
                using var json = await JsonDocument.ParseAsync(tempPage.ContentStream);
                if (json.RootElement.TryGetProperty("_count", out JsonElement count) && count.GetInt16() > 0)
                {
                    foreach (var obj in json.RootElement.GetProperty("Documents").EnumerateArray())
                    {
                        schools.Add(obj.ToObject<School>());
                    }
                }
            }
            IAsyncResult iAsyncResult = null;

            return Ok(new { state = 200, schools });
        }

        /// <summary>
        /// 测试隐式登录
        /// </summary>
        /// <returns></returns>
        [HttpPost("get-implicit")]
        public async Task<IActionResult> GetImplicit()
        {
            var clientID = _configuration.GetValue<string>("HaBookAuth:CoreService:clientID");
            var clientSecret = _configuration.GetValue<string>("HaBookAuth:CoreService:clientSecret");

            var location = _option.Location;
            if (location.Contains("China"))
            {
                location = "China";
            }
            else if (location.Contains("Global"))
            {
                location = "Global";
            }

            var token = await CoreTokenExtensions.CreateAccessToken(clientID, clientSecret, location);
            if (_httpClient.DefaultRequestHeaders.Contains("Authorization"))
            {
                _httpClient.DefaultRequestHeaders.Remove("Authorization");
            }

            _httpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {token.AccessToken}");
            var url = _configuration.GetValue<string>("HaBookAuth:CoreAPI");
            url = $"{url}/oauth2/implicit";
            Dictionary<string, string> data = new()
            {
                { "grant_type", "implicit" },
                { "client_id", clientID },
                { "account", "1636016499" },
                { "nonce", Guid.NewGuid().ToString() }
            };

            HttpResponseMessage responseMessage = await _httpClient.PostAsJsonAsync(url, data);
            if (responseMessage.StatusCode == HttpStatusCode.OK) //BI连接字符
            {
                string content = await responseMessage.Content.ReadAsStringAsync();


            }

            return Ok(new { state = 200, token, responseMessage });
        }

        /// <summary>
        /// 测试
        /// </summary>
        /// <param name="jsonElement"></param>
        /// <returns></returns>
        [HttpPost("get-test")]
        public async Task<IActionResult> GetTest(JsonElement jsonElement)
        {
            List<Test> list1 = new List<Test>();
            list1.Add(new Test { score = 10, name = "001" });
            list1.Add(new Test { score = 20, name = "002" });
            list1.Add(new Test { score = 30, name = "003" });
            list1.Add(new Test { score = 40, name = "004" });
            list1.Add(new Test { score = 50, name = "005" });
            list1.Add(new Test { score = 60, name = "006" });

            List<Test> list2 = new List<Test>();
            list2.Add(new Test { score = 40, name = "004" });
            list2.Add(new Test { score = 50, name = "005" });
            list2.Add(new Test { score = 60, name = "006" });
            list2.Add(new Test { score = 70, name = "007" });
            list2.Add(new Test { score = 80, name = "008" });
            list2.Add(new Test { score = 90, name = "009" });
            list2.Add(new Test { score = 100, name = "010" });

            //list3 return 2
            List<Test> list3 = list1.Where(x => !list2.Any(x2 => x.score == x2.score && x.name==x2.name)).ToList();
            //list4 return 2
            List<Test> list4 = list1.Where(x => list2.All(x2 => x.score != x2.score)).ToList();

            List<Test> temp = list1.Where(p => !list2.Select(b => b.score).Contains(p.score)).ToList();

            //List<Test> mergedList = new List<Test>(list1);
            //mergedList.AddRange(list2.Except(list1));

            // var mergedList = list1.Union(list2);

            var en2 = list1.Concat(list2).Except(list1.Intersect(list2));// 容斥原理

            var bingji = list1.Union(list2).ToList();//并（全）集

            var cha = bingji.GroupBy(x => x.score).Select(c => c.First()).ToList();


            var jiaoji = list1.Intersect(list2).ToList();//交集
            var chaji = list1.Except(list2).ToList();//差集

            List<Test> have = list1.Where(a => !list2.Exists(t => a.score == t.score)).ToList();
            have.AddRange(list2.Where(a => !list1.Exists(t => a.score == t.score)).ToList());

            return Ok(new { state = 200, have,  en2, bingji, cha, jiaoji, chaji, list3, list4, temp, list1 });
        }

        public class Test
        {
            public int age { get; set; }
            public string name { get; set; }
            public int score { get; set; }
        }

        public class strend
        {
            public int id { get; set; }

            public string name { get; set; }

            public int age { get; set; }
        }

        struct MyStruct
        {
            public int Count { get; set; }
        }

        class Example
        {
            public string? Name { get; set; }
            public string Value { get; set; }
        }

        public record TempSchool
        {
            public long ts { get; set; }
            public string id { get; set; }
            public string name { get; set; }

        }

        public static long GetMonthEnd(DateTimeOffset dt) 
        {
            DateTime dtNew = new DateTime(dt.Year, dt.Month, 1);
            var ste = dtNew.AddMonths(1).AddDays(-1).Day;
            long iLastDay = DateTimeOffset.Parse($"{dt.Year}-{dt.Month}-{ste} 23:59:59").ToUnixTimeSeconds();
            return iLastDay;
        }

        public static long GetMonthStart(DateTimeOffset dt)
        {
            DateTime dtNew = new DateTime(dt.Year, dt.Month, 1);
            long iLastDay = DateTimeOffset.Parse($"{dtNew}").ToUnixTimeSeconds();
            return iLastDay;
        }

        public record lessons 
        {
            public long countB { get; set; }
            public long countP { get; set; }
            public long countT { get; set; }
            public long countPT { get; set; }
            public LessonCount lesson { get; set; }
        }

        public record pageTest
        {
            public string keyt { get; set; }
            public string listv { get; set; }
        }

        public record pageTest1
        {
            public string keyt { get; set; }
            public List<string> listv { get; set; }
        }

        public class GenerateRandom1
        {
            /// <summary>
            /// 生成随机数字
            /// </summary>
            /// <param name="length">生成长度</param>
            /// <returns></returns>
            public static string Number(int Length)
            {
                return Number(Length, false);
            }

            /// <summary>
            /// 生成随机数字
            /// </summary>
            /// <param name="Length">生成长度</param>
            /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
            /// <returns></returns>
            public static string Number(int Length, bool Sleep)
            {
                if (Sleep)
                    System.Threading.Thread.Sleep(3);
                string result = "";
                System.Random random = new Random();
                for (int i = 0; i < Length; i++)
                {
                    result += random.Next(10).ToString();
                }
                return result;
            }

            /// <summary>
            /// 生成随机字母与数字
            /// </summary>
            /// <param name="IntStr">生成长度</param>
            /// <returns></returns>
            public static string Str(int Length)
            {
                return Str(Length, false);
            }
            /// <summary>
            /// 生成随机字母与数字
            /// </summary>
            /// <param name="Length">生成长度</param>
            /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
            /// <returns></returns>
            public static string Str(int Length, bool Sleep)
            {
                if (Sleep)
                    System.Threading.Thread.Sleep(3);
                char[] Pattern = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
                string result = "";
                int n = Pattern.Length;
                System.Random random = new Random(~unchecked((int)DateTime.Now.Ticks));
                for (int i = 0; i < Length; i++)
                {
                    int rnd = random.Next(0, n);
                    result += Pattern[rnd];
                }
                return result;
            }


            /// <summary>
            /// 生成随机纯字母随机数
            /// </summary>
            /// <param name="IntStr">生成长度</param>
            /// <returns></returns>
            public static string Str_char(int Length)
            {
                return Str_char(Length, false);
            }

            /// <summary>
            /// 生成随机纯字母随机数
            /// </summary>
            /// <param name="Length">生成长度</param>
            /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
            /// <returns></returns>
            public static string Str_char(int Length, bool Sleep)
            {
                if (Sleep) System.Threading.Thread.Sleep(3);
                //char[] Pattern = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z' };
                char[] Pattern = new char[] { 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };
                string result = "";
                int n = Pattern.Length;
                System.Random random = new Random(~unchecked((int)DateTime.Now.Ticks));
                for (int i = 0; i < Length; i++)
                {
                    int rnd = random.Next(0, n);
                    result += Pattern[rnd];
                }
                return result;
            }
        }
    }
}