GridView中添加一个CheckBox列

1 <% @ Page Language="C#" AutoEventWireup="true" CodeFile="GridView_CheckBoxColumn.aspx.cs" Inherits="GridSamples_GridView_CheckBoxColumn"  %>
 2
 3 <! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
 4
 5 < html  xmlns ="http://www.w3.org/1999/xhtml"   >
 6 < head  runat ="server" >
 7      < title > 无标题页 </ title >
 8      < script  language ="javascript"  type ="text/javascript" >
 9    function selectAll(obj)
10    {
11        var theTable  = obj.parentElement.parentElement.parentElement;
12        var i;
13        var j = obj.parentElement.cellIndex;
14        
15        for(i=0;i<theTable.rows.length;i++)
16        {
17            var objCheckBox = theTable.rows[i].cells[j].firstChild;
18            if(objCheckBox.checked!=null)objCheckBox.checked = obj.checked;
19        }
20    }
21     </ script >
22 </ head >
23 < body >
24      < form  id ="form1"  runat ="server" >
25      < div >
26          < asp:GridView  ID ="GridView1"  runat ="server"  AllowPaging ="True"  AutoGenerateColumns ="False"
27             DataKeyNames ="id"  DataSourceID ="AccessDataSource1"  AllowSorting ="True"  OnDataBinding ="GridView1_DataBinding"  OnRowDataBound ="GridView1_RowDataBound" >
28              < Columns >
29                  < asp:TemplateField >
30                      < ItemTemplate >
31                          < asp:CheckBox  ID ="CheckBox1"  runat ="server"  Checked ="True"  Text ='<%#DataBinder.Eval(Container.DataItem,"id")  % > ' />
32                      </ ItemTemplate >
33                      < HeaderTemplate >
34                          &nbsp; < input  id ="CheckAll"  type ="checkbox"  onclick ="selectAll(this);"   /> 本页全选
35                      </ HeaderTemplate >
36                  </ asp:TemplateField >
37                  < asp:BoundField  DataField ="id"  HeaderText ="id"  InsertVisible ="False"  ReadOnly ="True"
38                     SortExpression ="id"   />
39                  < asp:BoundField  DataField ="name"  HeaderText ="name"  SortExpression ="name"   />
40                  < asp:BoundField  DataField ="sex"  HeaderText ="sex"  SortExpression ="sex"   />
41                  < asp:BoundField  DataField ="deptid"  HeaderText ="deptid"  SortExpression ="deptid"   />
42              </ Columns >
43          </ asp:GridView >
44          &nbsp;
45       
46          < asp:AccessDataSource  ID ="AccessDataSource1"  runat ="server"  DataFile ="~/App_Data/test.mdb"
47             SelectCommand ="SELECT [id], [name], [sex], [deptid] FROM [employees]" ></ asp:AccessDataSource >
48          < asp:Button  ID ="Button1"  runat ="server"  OnClick ="Button1_Click"  Text ="ShowAllSelectedItem"   />
49          < asp:TextBox  ID ="TextBox1"  runat ="server"  Width ="200px" ></ asp:TextBox ></ div >
50      </ form >
51 </ body >
52 </ html >
53

 1 using  System;
 2 using  System.Data;
 3 using  System.Configuration;
 4 using  System.Collections;
 5 using  System.Web;
 6 using  System.Web.Security;
 7 using  System.Web.UI;
 8 using  System.Web.UI.WebControls;
 9 using  System.Web.UI.WebControls.WebParts;
10 using  System.Web.UI.HtmlControls;
11
12 public  partial  class  GridSamples_GridView_CheckBoxColumn : System.Web.UI.Page
13 {
14    /**//// <summary>
15    /// 获取或设置选中项的集合
16    /// </summary>
17    protected ArrayList SelectedItems
18    {
19        get
20        {
21            return (ViewState["mySelectedItems"] != null) ? (ArrayList)ViewState["mySelectedItems"] : null;
22        }
23        set
24        {
25            ViewState["mySelectedItems"] = value;
26        }
27    }
28
29    protected void Page_Load(object sender, EventArgs e)
30    {
31        
32    }
33
34
35    protected void GridView1_DataBinding(object sender, EventArgs e)
36    {
37        //在每一次重新绑定之前，需要调用CollectSelected方法从当前页收集选中项的情况
38        CollectSelected();
39    }
40
41    
42    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
43    {
44        //这里的处理是为了回显之前选中的情况
45        if (e.Row.RowIndex > -1 && this.SelectedItems!=null)
46        {
47            DataRowView row = e.Row.DataItem as DataRowView;
48            CheckBox cb = e.Row.FindControl("CheckBox1") as CheckBox;
49            if(this.SelectedItems.Contains(row["id"].ToString()))
50                cb.Checked = true;
51            else
52                cb.Checked = false;
53        }
54    }
55    /**//// <summary>
56    /// 从当前页收集选中项的情况
57    /// </summary>
58    protected void CollectSelected()
59    {
60        ArrayList selectedItems = null;
61        if (this.SelectedItems == null)
62            selectedItems = new ArrayList();
63        else
64            selectedItems = this.SelectedItems;
65
66        for (int i = 0; i < this.GridView1.Rows.Count; i++)
67        {
68            string id = this.GridView1.Rows[i].Cells[1].Text;
69            CheckBox cb = this.GridView1.Rows[i].FindControl("CheckBox1") as CheckBox;
70            if (selectedItems.Contains(id) && !cb.Checked)
71                selectedItems.Remove(id);
72            if (!selectedItems.Contains(id) && cb.Checked)
73                selectedItems.Add(id);
74        }
75        this.SelectedItems = selectedItems;
76    }
77
78    protected void Button1_Click(object sender, EventArgs e)
79    {
80        //最后，需要对选中项进行操作之前，不能忘了还要最后一次收集当前页的选中情况
81        CollectSelected();
82
83        this.TextBox1.Text = string.Empty;
84        foreach (object tmp in this.SelectedItems)
85            this.TextBox1.Text += tmp.ToString() + ",";
86    }
87}
88