SqlBulkCopy大批量数据插入到sql表中

alter TYPE TableType AS TABLE
( Name VARCHAR(50)
, code VARCHAR(50) )
GO

alter PROCEDURE usp_InsertProductionLocation
    @TVP TableType READONLY
    AS
    SET NOCOUNT ON
    if object_id(‘temp‘) is not null
    begin 
        drop table temp
    end
        SELECT * into temp FROM  @TVP;
    GO

DECLARE @LocationTVP AS TableType;

INSERT INTO @LocationTVP (Name, code)
    SELECT ‘tom‘,1
   EXEC usp_InsertProductionLocation @LocationTVP;
GO

 /// <summary>
        /// 
        /// </summary>
        /// <param name="connectionString">目标连接字符</param>
        /// <param name="TableName">目标表</param>
        /// <param name="dt">源数据</param>
        private static void SqlBulkCopyByDatatable(string connectionString, string TableName, DataTable dt)
        {
            using (SqlConnection conn = new SqlConnection(connectionString))
            {
                using (SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction))
                {
                    try
                    {
                        sqlbulkcopy.DestinationTableName = TableName;
                        for (int i = 0; i < dt.Columns.Count; i++)
                        {
                            sqlbulkcopy.ColumnMappings.Add(dt.Columns[i].ColumnName, dt.Columns[i].ColumnName);
                        }
                        sqlbulkcopy.WriteToServer(dt);
                    }
                    catch (System.Exception ex)
                    {
                        throw ex;
                    }
                }
            }
        }

DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("name"));
            dt.Columns.Add(new DataColumn("code"));
            for (int i = 0; i < 20; i++)
            {
                dt.Rows.Add(i.ToString(),i);
            }

            string strCon = @"Server=.;database=MyDb;uid=sa;pwd=sa;";          
            SqlBulkCopyByDatatableProc(strCon, "usp_InsertProductionLocation", dt);

  private static void SqlBulkCopyByDatatableProc(string connectionString, string ProcName, DataTable dt)
        {
            using (var conn = new SqlConnection(connectionString))
            {
                conn.Open();
                //// Invokes the stored procedure.
                using (var cmd = new SqlCommand(ProcName, conn))
                {
                    cmd.CommandType = CommandType.StoredProcedure;
                    //// Adding a "structured" parameter allows you to insert tons of data with low overhead
                    var param = new SqlParameter("@TVP", SqlDbType.Structured) { Value = dt };
                    cmd.Parameters.Add(param);
                    cmd.ExecuteNonQuery();
                }
            }
        }