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                            < 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            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 SelectedItems18    {19        get20        {21            return (ViewState["mySelectedItems"] != null) ? (ArrayList)ViewState["mySelectedItems"] : null;22        }23        set24        {25            ViewState["mySelectedItems"] = value;26        }27    }2829    protected void Page_Load(object sender, EventArgs e)30    {31        32    }333435    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    }4041    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            else52                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        else64            selectedItems = this.SelectedItems;6566        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    }7778    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();8283        this.TextBox1.Text = string.Empty;84        foreach (object tmp in this.SelectedItems)85            this.TextBox1.Text += tmp.ToString() + ",";86    }87} 88