DataGrid中加入CheckBox,并实现单选
原理就是用JS遍列所有CheckBox把所有CheckBox设为未被选中,然后在把单击的CheckBox设为选中
以下是.ASPX文件
<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="DataGridCheck.WebForm1" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm1</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
<SCRIPT language="JavaScript">
function SetCheckBoxState()
{
var dom=document.all;
var el=event.srcElement;
if(el.tagName=="INPUT"&&el.type.toLowerCase()=="checkbox")
{
for(i=0;i<dom.length;i++)
{
if(dom[i].tagName=="INPUT"&&dom[i].type.toLowerCase()=="checkbox")
{
dom[i].checked=false;
}
}
}
el.checked=!el.checked;
}
</SCRIPT>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<asp:datagrid id="dg" style="Z-INDEX: 101; LEFT: 168px; POSITION: absolute; TOP: 40px" runat="server"
Width="440px" AutoGenerateColumns="False">
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<asp:CheckBox id="chkExport" runat="server"></asp:CheckBox>
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="IntegerValue"></asp:BoundColumn>
<asp:BoundColumn DataField="StringValue"></asp:BoundColumn>
<asp:BoundColumn DataField="CurrencyValue"></asp:BoundColumn>
</Columns>
</asp:datagrid><asp:button id="Button1" style="Z-INDEX: 102; LEFT: 168px; POSITION: absolute; TOP: 8px" runat="server"
Text="显示内容"></asp:button></FONT></form>
</body>
</HTML>
以下是CS文件
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace DataGridCheck
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.DataGrid dg;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if (!Page.IsPostBack)
{
dg.DataSource= CreateDataSource() ;
dg.DataBind();
}
}
ICollection CreateDataSource()
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
for (int i = 0; i < 9; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i + 1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
Web 窗体设计器生成的代码
private void Button1_Click(object sender, System.EventArgs e)
{
System.Web.UI.WebControls.CheckBox chkExport;
foreach (DataGridItem dgItem in dg.Items)
{
chkExport=(CheckBox)dgItem.FindControl("chkExport");
if(chkExport.Checked)
{
Response.Write("<script>alert('"+dgItem.Cells[2].Text+"和"+dgItem.Cells[3].Text+"')</script>");
}
}
}
private void dg_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if(e.Item.ItemIndex<0) return;
if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
System.Web.UI.WebControls.CheckBox chkExport;
chkExport=(CheckBox)e.Item.FindControl("chkExport");
chkExport.Attributes.Add("OnClick","SetCheckBoxState()");
e.Item.Attributes.Add("onmouseover","currentcolor=this.style.backgroundColor;this.style.backgroundColor='48d1cc'");
e.Item.Attributes.Add("onmouseout","this.style.backgroundColor=currentcolor");
}
}
}
}
