Ado.Net查询语句使用临时表做条件

using System;
using System.Data;
using System.Data.SqlClient;
using System.Text;

namespace WindowsFormsApp1
{
    public class SQLHelper
    {
        static string connStr = "Data Source='.';Initial Catalog='DBName';User ID='sa';Password='123456';Connect Timeout=60000;";

        /// <summary>
        /// 带临时查询表sql  
        /// </summary>
        /// <param name="Sql"> 查询sql </param>
        /// <param name="CreateTmpTablesql"> 创建临时表语句 </param>
        /// <param name="TmpTableName">在数据库中创建临时表sql</param>
        /// <param name="TmpData">临时表数据</param>
        public static DataSet GetDataTmpTableSqlBulkCopy(string Sql, string CreateTmpTablesql, string TmpTableName, DataTable TmpData)
        {
            //构造SQL语句
            StringBuilder sb = new StringBuilder();
            #region 处理临时表数据为空则不处理临时表
            using (SqlConnection thisConn = new SqlConnection(connStr))
            {
                try
                {
                    thisConn.Open();
                    if (!string.IsNullOrEmpty(CreateTmpTablesql) && !string.IsNullOrEmpty(TmpTableName) && TmpData != null)
                    {
                        //创建临时表
                        SqlCommand cmd = new SqlCommand(CreateTmpTablesql.ToString(), thisConn);
                        object returnValue = cmd.ExecuteScalar();
                        // 使用 SqlBulkCopy 批量保存临时表数据
                        SqlBulkCopy bulkCopy = new SqlBulkCopy(thisConn);
                        bulkCopy.DestinationTableName = TmpTableName;
                        bulkCopy.BatchSize = TmpData.Rows.Count;
                        bulkCopy.WriteToServer(TmpData);
                    }
                    //查询带临时表的sql
                    DataSet ds = new DataSet();
                    SqlDataAdapter da = new SqlDataAdapter(Sql, thisConn);
                    da.Fill(ds);
                    return ds;
                }
                catch (Exception ex)
                {
                    return null;
                }
                finally
                {
                    thisConn.Close();
                }
            }
            #endregion 
        }
    }
}

// 测试调用
private void Button1_Click(object sender, EventArgs e)
{
       // 创建临时表sql语句
       string CreateTmpTablesql = @"select top 1 MethodName into #tmpTable  from AbpAuditLogs";
       DataTable dataTable = new DataTable();
       dataTable.Columns.Add("MethodName");
       foreach (var item in "Index,GetAll".Split(','))
       {
           DataRow row = dataTable.NewRow();
           row["MethodName"] = item;
           dataTable.Rows.Add(row);
       }        
       string sql = @"select * from AbpAuditLogs a where exists ( select * from #tmpTable  tmp where a.MethodName= tmp .MethodName )  ";
       DataSet ds = SQLHelper.GetDataTmpTableSqlBulkCopy(sql, CreateTmpTablesql, "#tmpTable", dataTable);           
}