客户端绑定DataView和DataTable的技巧代码,C#代码库,德仔网

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【C#】客户端绑定DataView和DataTable的技巧
作者:明蔚 / 发布于2016/7/31/ 701
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace BindDataGridViewAndDataTable
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            initData();
           

        }
         System.Data.DataTable dt  =   new  DataTable();
         System.Data.DataSet ds  =   new  DataSet();

        
 
          /// <summary>
          /// 初始化数据
          /// </summary>
          private   void  initData()
            {
             dt.TableName  =   "Table1" ;
             ds.Tables.Add(dt);
             dt.Columns.Add( "ID" ,  typeof ( string ));
             dt.Columns.Add( "板块" ,  typeof ( string ));
             dt.Columns.Add( "积分" ,  typeof ( int ));
 
             addData(dt,  "jinjazz" ,  "delphi" ,  50000 );
             addData(dt,  "jinjazz" ,  "Sqlserver" ,  10000 );
             addData(dt,  "jinjazz" ,  ".net" ,  20000 );
             addData(dt,  "zjcxc" ,  "Sqlserver" ,  900000 );
             addData(dt,  "zjcxc" ,  "vb" ,  10000 );
             addData(dt,  "zswang" ,  "delphi" ,  70000 );
             addData(dt,  "zswang" ,  ".net" ,  30000 );
         } 
 
          private   void  addData(DataTable dt,  string  Name,  string  Catalog,  int  Salary)
           {
             System.Data.DataRow drow  =  dt.NewRow();
             drow[ "ID" ]  =  Name;
             drow[ "板块" ]  =  Catalog;
             drow[ "积分" ]  =  Salary;
             dt.Rows.Add(drow);
         } 
 
        private void Form1_Load(object sender, EventArgs e)
        {   
            
              // 绑定所有没有重复的ID到comboBox1 
               this .comboBox1.DataSource  =  dt.DefaultView.ToTable( true ,  new string[]{"ID"} );
              this .comboBox1.DisplayMember  =   "ID" ;
 
              // 绑定所有板块到comboBox2 
              this .comboBox2.DataSource  =   new  DataView(dt);
              this .comboBox2.DisplayMember  =   "板块" ;
 
              // 设置两个联动刷新 
              this.comboBox1.SelectedIndexChanged += new EventHandler(comboBox1_SelectedIndexChanged);

              this.comboBox2.SelectedIndexChanged += new EventHandler(comboBox2_SelectedIndexChanged);

 
              // 绑定所有数据到dataGridView1 
              this .dataGridView1.DataSource  =  dt;
 
              // 绑定所有数据到dataGridView2 
              this .dataGridView2.DataSource  =   new  DataView(dt);
 
              // 利用DataRelation求汇总表格 
             System.Data.DataTable dtGroup1 = dt.DefaultView.ToTable( true , "ID" );
             dtGroup1.TableName  =   "Table2" ;
             ds.Tables.Add(dtGroup1);
             System.Data.DataRelation dr  =   new  DataRelation( "relation" , dtGroup1.Columns[ "ID" ], dt.Columns[ "ID" ]);
             ds.Relations.Add(dr);
             dtGroup1.Columns.Add( "总积分" ).Expression  =   "sum(child(relation).积分)" ;
             dtGroup1.Columns.Add( "板块数" ).Expression  =   "count(child(relation).板块)" ;
              this .dataGridView3.DataSource  =  dtGroup1;
 

        }

        void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();
            
        }


       private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            // 设置combobox2和comboBox1同步 
            System.Data.DataView dv = this.comboBox2.DataSource as DataView;
            dv.RowFilter = string.Format(" ID='{0}' ", this.comboBox1.Text);
            // 设置dataGridView2和comboBox1同步 
            dv = this.dataGridView2.DataSource as DataView;
            dv.RowFilter = string.Format(" ID='{0}' ", this.comboBox1.Text);

        }


    }
}
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