c# 把List<T>转成DataTable对象，批量导入Sqlserver库

  /// <summary>
         /// Sqlbulkcopies the specified SMS.批量插入到数据库
         /// </summary>
         /// <param name="data">list类型数据.</param>
         /// <param name="sqlconn">数据库连接字符串.</param>
         private void SqlbulkcopyPipeLines(List<CPipe> data, SqlConnection sqlconn, string prjId, string modid)
         {
             #region 待处理数据初始化处理
             List<PropertyInfo> pList = new List<PropertyInfo>();//创建属性的集合
             DataTable dtLoad = new DataTable();
             //把所有的public属性加入到集合 并添加DataTable的列
             //    Array.ForEach<PropertyInfo>(typeof(CJunc).GetProperties(), p => { pList.Add(p); dt.Columns.Add(p.Name, p.PropertyType); });  //获得反射的入口（typeof（）） //要对 array 的每个元素执行的 System.Action。

             dtLoad.Columns.Add("ProjectID", typeof(int));
             dtLoad.Columns.Add("ModelID", typeof(int));
             dtLoad.Columns.Add("ID", typeof(string));
             dtLoad.Columns.Add("Node1", typeof(string));
             dtLoad.Columns.Add("Node2", typeof(string));
             dtLoad.Columns.Add("Length", typeof(decimal));
             dtLoad.Columns.Add("Diameter", typeof(decimal));
             dtLoad.Columns.Add("Roughness", typeof(decimal));
             dtLoad.Columns.Add("MinorLoss", typeof(string));
             dtLoad.Columns.Add("Status", typeof(string));
             dtLoad.Columns.Add("Comment", typeof(string));

             foreach (var item in data)
             {
                 DataRow row = dtLoad.NewRow(); //创建一个DataRow实例
                 //  pList.ForEach(p => row[p.Name] = p.GetValue(item, null)); //给row 赋值
                 //  [ProjectID] ,[ModelID] ,[ID] ,[Node1] ,[Node2] ,[Length]  ,[Diameter]  ,[Roughness],[MinorLoss],[Status] ,[Comment]
                 //  insert_pipesData(db_do, prjId, modid, PipeLines[i].ID, PipeLines[i].Node1, PipeLines[i].Node2, PipeLines[i].Data[CPipe.PIPE_LEN_INDEX], PipeLines[i].Data[CPipe.PIPE_DIAM_INDEX], PipeLines[i].Data[CPipe.PIPE_ROUGH_INDEX], PipeLines[i].Data[CPipe.PIPE_MLOSS_INDEX], PipeLines[i].Data[CPipe.PIPE_STATUS_INDEX], PipeLines[i].Data[CGlobalConst.COMMENT_INDEX]);

                 row["ProjectID"] = prjId;
                 row["ModelID"] = modid;
                 row["ID"] = item.ID;
                 row["Node1"] = item.Node1;
                 row["Node2"] = item.Node2;

                 /*
                 if (item.Data[CPipe.PIPE_LEN_INDEX].Trim().Length == 0) { row["Length"] = 0; Console.WriteLine("Length为空:" + item.Data[CPipe.PIPE_LEN_INDEX]); }
                 if (IsNumeric(item.Data[CPipe.PIPE_LEN_INDEX])) { row["Length"] = item.Data[CPipe.PIPE_LEN_INDEX]; }
                 else { row["Length"] = 0; Console.WriteLine("Length非数字:" + item.Data[CPipe.PIPE_LEN_INDEX]); }

                 if (item.Data[CPipe.PIPE_DIAM_INDEX].Trim().Length == 0) { row["Diameter"] = 0; Console.WriteLine("Diameter为空:" + item.Data[CPipe.PIPE_DIAM_INDEX]); }
                 if (IsNumeric(item.Data[CPipe.PIPE_DIAM_INDEX])) { row["Diameter"] = item.Data[CPipe.PIPE_DIAM_INDEX]; }
                 else { row["Diameter"] = 0; Console.WriteLine("Diameter非数字:" + item.Data[CPipe.PIPE_DIAM_INDEX]); }

                 if (item.Data[CPipe.PIPE_ROUGH_INDEX].Trim().Length == 0) { row["Roughness"] = 0; Console.WriteLine("Roughness为空:" + item.Data[CPipe.PIPE_ROUGH_INDEX]); }
                 if (IsNumeric(item.Data[CPipe.PIPE_ROUGH_INDEX])) { row["Roughness"] = item.Data[CPipe.PIPE_ROUGH_INDEX]; }
                 else { row["Roughness"] = 0; Console.WriteLine("Roughness非数字:" + item.Data[CPipe.PIPE_ROUGH_INDEX]); }
                  */

                 row["Length"] = item.Data[CPipe.PIPE_LEN_INDEX];
                 row["Diameter"] = item.Data[CPipe.PIPE_DIAM_INDEX];
                 row["Roughness"] = item.Data[CPipe.PIPE_ROUGH_INDEX];
                 row["MinorLoss"] = item.Data[CPipe.PIPE_MLOSS_INDEX];
                 row["Status"] = item.Data[CPipe.PIPE_STATUS_INDEX];
                 row["Comment"] = item.Data[CGlobalConst.COMMENT_INDEX];

                 dtLoad.Rows.Add(row); //加入到DataTable
             }
             #endregion
             #region 批量插入数据库 SqlBulkCopy声明及参数设置
             try
             {
                 //  SqlBulkCopy xx = new SqlBulkCopy(sqlconn,
                 //  SqlBulkCopy bulk = new SqlBulkCopy(sqlconn.ToString(), SqlBulkCopyOptions.UseInternalTransaction)
                 // { DestinationTableName = "ENG_FailSendSMS" /*设置数据库目标表名称*/, BatchSize = dt.Rows.Count /*每一批次中的行数*/ };
                 //  SqlBulkCopy xxx =new SqlBulkCopy(sqlconn,
                 SqlBulkCopy bulk = new SqlBulkCopy(sqlconn, SqlBulkCopyOptions.UseInternalTransaction, null) { DestinationTableName = "T_PIPES" /*设置数据库目标表名称*/, BatchSize = dtLoad.Rows.Count /*每一批次中的行数*/ };

                 bulk.ColumnMappings.Add("ProjectID", "ProjectID"); //设置数据源中的列和目标表中的列之间的映射关系
                 bulk.ColumnMappings.Add("ModelID", "ModelID");//ColumnMappings.Add("源数据表列名称", "目标表数据列名称");
                 bulk.ColumnMappings.Add("ID", "ID");
                 bulk.ColumnMappings.Add("Node1", "Node1");
                 bulk.ColumnMappings.Add("Node2", "Node2");
                 bulk.ColumnMappings.Add("Length", "Length");
                 bulk.ColumnMappings.Add("Diameter", "Diameter");
                 bulk.ColumnMappings.Add("Roughness", "Roughness");
                 bulk.ColumnMappings.Add("MinorLoss", "MinorLoss");
                 bulk.ColumnMappings.Add("Status", "Status");
                 bulk.ColumnMappings.Add("Comment", "Comment");

               //  insert_pipesData(db_do, prjId, modid, PipeLines[i].ID, PipeLines[i].Node1, PipeLines[i].Node2, PipeLines[i].Data[CPipe.PIPE_LEN_INDEX], PipeLines[i].Data[CPipe.PIPE_DIAM_INDEX], PipeLines[i].Data[CPipe.PIPE_ROUGH_INDEX], PipeLines[i].Data[CPipe.PIPE_MLOSS_INDEX], PipeLines[i].Data[CPipe.PIPE_STATUS_INDEX], PipeLines[i].Data[CGlobalConst.COMMENT_INDEX]);

               //    void insert_pipesData(WaterNetObjectDB db_do, string prjId, string modid, string id, string node1, string node2, string len, string diam, string rough, string mloss, string status, string comment)
               //   {
               //    string sql;
               //    sql = "insert into T_PIPES values(" + prjId + "," + modid + ",'" + id + "','" + node1 + "','" + node2 + "'," + len + "," + diam + "," + rough + ",'" + mloss + "','" + status + "','" + comment + "') ";
              //     db_do.nonQuerySql(sql);
               //    }

            //     [ProjectID] ,[ModelID] ,[ID] ,[Node1] ,[Node2] ,[Length]  ,[Diameter]  ,[Roughness],[MinorLoss],[Status] ,[Comment]
             #endregion
                 bulk.WriteToServer(dtLoad);
                 if (bulk != null)
                 {
                     bulk.Close();
                 }
             }
             catch (Exception e)
             {
                 Console.WriteLine(e.Message.ToString());
             }
         }