求ASP.NET2.0中GridView加入CheckBox實現全選代碼.

shixianyong 2006-07-05 05:33:47

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Eddie005 2006-07-05

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridView_CheckBoxColumn.aspx.cs" Inherits="GridSamples_GridView_CheckBoxColumn" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
<script language="javascript" type="text/javascript">
function selectAll(obj)
{
var theTable = obj.parentElement.parentElement.parentElement;
var i;
var j = obj.parentElement.cellIndex;

for(i=0;i<theTable.rows.length;i++)
{
var objCheckBox = theTable.rows[i].cells[j].firstChild;
if(objCheckBox.checked!=null)objCheckBox.checked = obj.checked;
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"
DataKeyNames="id" DataSourceID="AccessDataSource1" AllowSorting="True" OnDataBinding="GridView1_DataBinding" OnRowDataBound="GridView1_RowDataBound">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" Checked="True" Text='<%#DataBinder.Eval(Container.DataItem,"id") %>' />
</ItemTemplate>
<HeaderTemplate>
<input id="CheckAll" type="checkbox" onclick="selectAll(this);" />本页全选
</HeaderTemplate>
</asp:TemplateField>
<asp:BoundField DataField="id" HeaderText="id" InsertVisible="False" ReadOnly="True"
SortExpression="id" />
<asp:BoundField DataField="name" HeaderText="name" SortExpression="name" />
<asp:BoundField DataField="sex" HeaderText="sex" SortExpression="sex" />
<asp:BoundField DataField="deptid" HeaderText="deptid" SortExpression="deptid" />
</Columns>
</asp:GridView>

<asp:AccessDataSource ID="AccessDataSource1" runat="server" DataFile="~/App_Data/test.mdb"
SelectCommand="SELECT [id], [name], [sex], [deptid] FROM [employees]"></asp:AccessDataSource>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="ShowAllSelectedItem" />
<asp:TextBox ID="TextBox1" runat="server" Width="200px" ReadOnly="True"></asp:TextBox></div>
</form>
</body>
</html>
************************************
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class GridSamples_GridView_CheckBoxColumn : System.Web.UI.Page
{
/// <summary>
/// 获取或设置选中项的集合
/// </summary>
protected ArrayList SelectedItems
{
get
{
return (ViewState["mySelectedItems"] != null) ? (ArrayList)ViewState["mySelectedItems"] : null;
}
set
{
ViewState["mySelectedItems"] = value;
}
}

protected void Page_Load(object sender, EventArgs e)
{

}

protected void GridView1_DataBinding(object sender, EventArgs e)
{
//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
CollectSelected();
}

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
//这里的处理是为了回显之前选中的情况
if (e.Row.RowIndex > -1 && this.SelectedItems!=null)
{
DataRowView row = e.Row.DataItem as DataRowView;
CheckBox cb = e.Row.FindControl("CheckBox1") as CheckBox;
if(this.SelectedItems.Contains(row["id"].ToString()))
cb.Checked = true;
else
cb.Checked = false;
}
}
/// <summary>
/// 从当前页收集选中项的情况
/// </summary>
protected void CollectSelected()
{
ArrayList selectedItems = null;
if (this.SelectedItems == null)
selectedItems = new ArrayList();
else
selectedItems = this.SelectedItems;

for (int i = 0; i < this.GridView1.Rows.Count; i++)
{
string id = this.GridView1.Rows[i].Cells[1].Text;
CheckBox cb = this.GridView1.Rows[i].FindControl("CheckBox1") as CheckBox;
if (selectedItems.Contains(id) && !cb.Checked)
selectedItems.Remove(id);
if (!selectedItems.Contains(id) && cb.Checked)
selectedItems.Add(id);
}
this.SelectedItems = selectedItems;
}

protected void Button1_Click(object sender, EventArgs e)
{
//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
CollectSelected();

this.TextBox1.Text = string.Empty;
foreach (object tmp in this.SelectedItems)
this.TextBox1.Text += tmp.ToString() + ",";
}
}

Eddie005 2006-07-05