SqlCommandBuilder实现大数据更新

/// <param name="table">准备更新的DataTable新数据</param>
        /// <param name="TableName">对应要更新的数据库表名</param>
        /// <param name="primaryKeyName">对应要更新的数据库表的主键名</param>
        /// <param name="columnsName">对应要更新的列的列名集合</param>
        /// <param name="limitColumns">需要在ＳＱＬ的ＷＨＥＲＥ条件中限定的条件字符串，可为空。</param>
        /// <param name="onceUpdateNumber">每次往返处理的行数</param>
        /// <returns>返回更新的行数</returns>
        public static int Update(DataTable table, string TableName, string primaryKeyName, string[] columnsName, int onceUpdateNumber)
        {
            if (string.IsNullOrEmpty(TableName)) return 0;
            if (string.IsNullOrEmpty(primaryKeyName)) return 0;
            if (columnsName == null || columnsName.Length <= 0) return 0;
           
            //DataSet ds = new DataSet();
           // 如何把已经属于一个DataSet的DataTable加到另一个DataSet中解决方法
            //对需要添加的datatabele进行复制后再添加。
            //DataTable tableNew = new DataTable();
            //tableNew = table.Copy();
            //ds.Tables.Add(table);
           
            int result = 0;
            using (SqlConnection sqlconn = new SqlConnection(ConnectionString))
            {
                sqlconn.Open();

                //使用加强读写锁事务  
                //SqlTransaction tran = sqlconn.BeginTransaction(IsolationLevel.ReadCommitted);
                try
                {
                    foreach (DataRow dr in table.Rows)
                    {
                        //所有行设为修改状态  
                        dr.SetModified();
                    }
                    //为Adapter定位目标表  
                    SqlCommand cmd = new SqlCommand(string.Format("select Name,Pwd from {0}", TableName), sqlconn);
                    SqlDataAdapter da = new SqlDataAdapter(cmd);
                    SqlCommandBuilder sqlCmdBuilder = new SqlCommandBuilder(da);
                    da.AcceptChangesDuringUpdate = false;
                    string columnsUpdateSql = "";
                    //SqlParameter[] paras = new SqlParameter[columnsName.Length];
                    ////需要更新的列设置参数是,参数名为"@+列名"
                    //for (int i = 0; i < columnsName.Length; i++)
                    //{
                    //    //此处拼接要更新的列名及其参数值
                    //    columnsUpdateSql += ("[" + columnsName[i] + "]" + "=@" + columnsName[i] + ",");
                    //    paras[i] = new SqlParameter("@" + columnsName[i], columnsName[i]);
                    //}
                    //if (!string.IsNullOrEmpty(columnsUpdateSql))
                    //{
                    //    //此处去掉拼接处最后一个","
                    //    columnsUpdateSql = columnsUpdateSql.Remove(columnsUpdateSql.Length - 1);
                    //}
                    //此处生成where条件语句
                    string limitSql = ("[" + primaryKeyName + "]" + "=@" + primaryKeyName);
                    string sql = "Update T_SQLTable  SET Name=@Name,Pwd=@Pwd where ID=@ID";
                    SqlCommand updateCmd = new SqlCommand(sql);
                    //不修改源DataTable  
                    updateCmd.UpdatedRowSource = UpdateRowSource.None;
                    da.UpdateCommand = updateCmd;
                    da.UpdateCommand.Parameters.Add("@Name",SqlDbType.NVarChar,100,"Name");
                    da.UpdateCommand.Parameters.Add("@Pwd", SqlDbType.NVarChar, 100,"Pwd");
                    da.UpdateCommand.Parameters.Add("@ID", SqlDbType.Int, 100, "ID");

                    //da.UpdateCommand.Parameters.AddWithValue("@" + primaryKeyName, primaryKeyName);
                    //每次往返处理的行数
                    da.UpdateBatchSize = onceUpdateNumber;


                   
                    result = da.Update(table);
                    table.AcceptChanges();
                    //tran.Commit();

                }
                catch
                {
                    //tran.Rollback();
                }
                finally
                {
                    sqlconn.Dispose();
                    sqlconn.Close();
                }


            }
            return result;
        }

调用：

  DAL.DBHelper db=new DAL.DBHelper();
           DataTable Oletable= db.GetDataTable("select * from T_SQLDB");
           DAL.DBHelper.Update(Oletable, "T_SQLTable", "ID", new string[] { "Name", "Pwd" }, 5000);