批量更新

首先借助于一个DataHelper类

using  System;
using  System.Data;
using  System.Data.SqlClient;
namespace  NET.MST.Ninth.BatchUpdate
{
     class  DataHelper
    {
         // 连接字符串
         static   readonly  String conn_String  =   " Server=localhost;Integrated Security=true;database=NetTest " ;
         // 选择、更新、删除和插入的SQL命令
         static   readonly  String SQL_SELECT  =   " SELECT * FROM DepartCost " ;
         static   readonly  String SQL_UPDATE  =   " UPDATE DepartCost SET Department=@Department,Item=@Item,Number=@Number where Id=@Id " ;
         static   readonly  String SQL_DELETE  =   " DELETE FROM DepartCost where Id=@Id " ;
         static   readonly  String SQL_INSERT  =   " Insert INTO DepartCost (Department,Item,Number) VALUES (@Department,@Item,@Number) " ;
         ///   <summary>
         ///  得到SqlDataAdapter，私有方法
         ///   </summary>
         ///   <param name="con"></param>
         ///   <returns></returns>
         private   static  SqlDataAdapter GetDataAdapter(SqlConnection con)
        {
            SqlDataAdapter sda  =   new  SqlDataAdapter();
            sda.SelectCommand  =   new  SqlCommand(SQL_SELECT, con);
            sda.UpdateCommand  =   new  SqlCommand(SQL_UPDATE, con);
            sda.DeleteCommand  =   new  SqlCommand(SQL_DELETE, con);
            sda.InsertCommand  =   new  SqlCommand(SQL_INSERT, con);
            sda.UpdateCommand.Parameters.AddRange(GetUpdatePars());
            sda.InsertCommand.Parameters.AddRange(GetInsertPars());
            sda.DeleteCommand.Parameters.AddRange(GetDeletePars());
             return  sda;
        }
         // 三个SqlCommand的参数
         private   static  SqlParameter[] GetInsertPars()
        {
            SqlParameter[] pars  =   new  SqlParameter[ 3 ];
            pars[ 0 ]  =   new  SqlParameter( " @Department " , SqlDbType.VarChar,  50 ,  " Department " );
            pars[ 1 ]  =   new  SqlParameter( " @Item " , SqlDbType.VarChar,  50 ,  " Item " );
            pars[ 2 ]  =   new  SqlParameter( " @Number " , SqlDbType.Int,  4 ,  " Number " );
             return  pars;
        }
         private   static  SqlParameter[] GetUpdatePars()
        {
            SqlParameter[] pars  =   new  SqlParameter[ 4 ];
            pars[ 0 ]  =   new  SqlParameter( " @Id " , SqlDbType.VarChar,  50 ,  " Id " );
            pars[ 1 ]  =   new  SqlParameter( " @Department " , SqlDbType.VarChar,  50 ,  " Department " );
            pars[ 2 ]  =   new  SqlParameter( " @Item " , SqlDbType.VarChar,  50 ,  " Item " );
            pars[ 3 ]  =   new  SqlParameter( " @Number " , SqlDbType.Int,  4 ,  " Number " );
             return  pars;
        }
         private   static  SqlParameter[] GetDeletePars()
        {
            SqlParameter[] pars  =   new  SqlParameter[ 1 ];
            pars[ 0 ]  =   new  SqlParameter( " @Id " , SqlDbType.VarChar,  50 ,  " Id " );
             return  pars;
        }
         ///   <summary>
         ///  检索数据，内部使用SelectCommand
         ///   </summary>
         ///   <returns> 返回DataSet对象 </returns>
         public   static  DataSet GetDataSet()
        {
            SqlConnection con  =   new  SqlConnection(conn_String);
            DataSet ds  =   new  DataSet();
             try
            {
                con.Open();
                 using  (SqlDataAdapter sda  =  GetDataAdapter(con))
                {
                    sda.Fill(ds);
                     return  ds;
                }
            }
             finally
            {
                con.Close();
                con.Dispose();
            }
        }
         ///   <summary>
         ///  更新数据库，使用批量更新
         ///   </summary>
         public   static   void  Update(DataSet ds)
        {
            SqlConnection con  =   new  SqlConnection(conn_String);
             try
            {
                con.Open();
                 using  (SqlDataAdapter sda  =  GetDataAdapter(con))
                {
                     // 设置BatchUpdate
                    sda.UpdateBatchSize  =   0 ;
                    sda.Update(ds);
                }
            }
             finally
            {
                con.Close();
                con.Dispose();
            }
        }
    }
}

调用执行：

using  System;
using  System.Data;
using  System.Data.SqlClient;
namespace  NET.MST.Ninth.BatchUpdate
{
     ///   <summary>
     ///  进行测试
     ///   </summary>
     partial   class  User
    {
         static   void  Main( string [] args)
        {
             // 打印初始表
            Console.WriteLine( " 表DepartCost： " );
            DataSet ds  =  DataHelper.GetDataSet();
            PrintDataSet(ds);
             // 尝试插入一行
            Console.WriteLine( " 执行插入后的表DepartCost： " );
            InsertNewRow(ds);
            DataHelper.Update(ds);
            ds  =  DataHelper.GetDataSet();
            PrintDataSet(ds);
             // 修改新插入行的值
            Console.WriteLine( " 执行修改后的表DepartCost： " );
            EditRow(ds);
            DataHelper.Update(ds);
            ds  =  DataHelper.GetDataSet();
            PrintDataSet(ds);
             // 删除新插入的行
            Console.WriteLine( " 执行删除后的表DepartCost： " );
            DeleteRow(ds);
            DataHelper.Update(ds);
            ds  =  DataHelper.GetDataSet();
            PrintDataSet(ds);
             // 等待
            Console.Read();
        }
         static   void  PrintDataSet(DataSet ds)
        {
             // 打印结果
            DataTable dt  =  ds.Tables[ 0 ];
             // 打印列名
             foreach  (DataColumn column  in  dt.Columns)
                Console.Write( " {0}   " , column.ColumnName);
            Console.Write( " \r\n " );
             // 打印表
             foreach  (DataRow row  in  dt.Rows)
            {
                 for  ( int  i  =   0 ; i  <  dt.Columns.Count; i ++ )
                {
                    Console.Write( " {0}   " , row[i].ToString());
                }
                Console.Write( " \r\n " );
            }
        }
    }
     ///   <summary>
     ///  插入、修改、删除DataSet中的行
     ///   </summary>
     partial   class  User
    {
         static   void  InsertNewRow(DataSet ds)
        {
            DataRow newrow  =  ds.Tables[ 0 ].NewRow();
            newrow[ " Department " ]  =   " F5 " ;
            newrow[ " Item " ]  =   " Item5 " ;
            newrow[ " Number " ]  =   5 ;
            ds.Tables[ 0 ].Rows.Add(newrow);
        }
         static   void  EditRow(DataSet ds)
        {
             int  count  =  ds.Tables[ 0 ].Rows.Count;
            ds.Tables[ 0 ].Rows[count  -   1 ][ " Department " ]  =   " newfac " ;
        }
         static   void  DeleteRow(DataSet ds)
        {
             int  count  =  ds.Tables[ 0 ].Rows.Count;
            ds.Tables[ 0 ].Rows[count  -   1 ].Delete();
        }
    }
}