我们项目后台操作中不可避免的会有同时删除多项的操作，本文实现的就是当点击全选时，选定当前页中所有项，当取消了某一项的选定，则“全选”CheckBox的checked也为false；然后在后台中取到所选定的项的ID，实现同时删除多项的功能。
前台代码
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="NewsForm.aspx.cs" Inherits="Admin_NewsForm" %>
<!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 type="text/javascript" language="javascript">
function isOrNotCheckAll(checkValue)
{
var arrAllCheckBoxes = document.getElementsByTagName("input");
//check all
if(checkValue==true)
{
for(i=0;i<arrAllCheckBoxes.length;i++)
{
if(document.getElementById(arrAllCheckBoxes[i].id).type=="checkbox")
{
document.getElementById(arrAllCheckBoxes[i].id).checked=true;
}
}
}
//do not check any one
if(checkValue==false)
{
for(i=0;i<arrAllCheckBoxes.length;i++)
{
if(document.getElementById(arrAllCheckBoxes[i].id).type=="checkbox")
{
document.getElementById(arrAllCheckBoxes[i].id).checked=false;
}
}
}
}
function CBDeleteClick(clientID,checkAllClientID)
{
var arrAllCheckBoxes = document.getElementsByTagName("input");
//there has some one not be checked
if(document.getElementById(clientID).checked==false)
{
for(i=0;i<arrAllCheckBoxes.length;i++)
{
if(arrAllCheckBoxes[i].id.indexOf("CheckAll")!=-1)
{
arrAllCheckBoxes[i].checked=false;
}
}
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:Image ID="Image1" runat="server" ImageUrl="HXImages/button/btn_add.gif" />
<asp:ImageButton ID="BtnDelete" runat="server"
ImageUrl="~/Admin/HXImages/button/btn_del.gif" onclick="BtnDelete_Click" />
<asp:GridView ID="GVNews" runat="server" AutoGenerateColumns="False" DataKeyNames="newsID"
Width="100%" onrowdatabound="GVNews_RowDataBound"
onrowdeleting="GVNews_RowDeleting" AllowPaging="True"
onpageindexchanging="GVNews_PageIndexChanging" PageSize="3" >
<Columns>
<asp:TemplateField>
<HeaderTemplate>
全选
<asp:CheckBox ID="CheckAll" runat="server" OnClick="javascript: return isOrNotCheckAll (this.checked);" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="CBDelete" runat="server" />
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:BoundField DataField="newsID" HeaderText="序号" >
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="newsTitle" HeaderText="标题">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:TemplateField HeaderText="添加日期">
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
<%# Convert.ToDateTime(Eval("newsDate")).ToString("yyyy-MM-dd")%>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="newsDegree" HeaderText="点击次数(次)">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:TemplateField HeaderText="操作">
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
<asp:ImageButton ID="ImgDel" title="删除" CommandName="delete" ImageUrl="HXImages/del.gif" runat="server" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</form>
</body>
</html>
后台代码
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
public partial class Admin_NewsForm : System.Web.UI.Page
{
string sql = null;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGVNews();
BtnDelete.Attributes.Add("onclick", "return confirm('确定要删除吗？');");
}
}
void BindGVNews()
{
sql = string.Format("select * from newsTable order by newsID desc");
DataTable dt = DataBase.ExecuteDataSet(sql).Tables[0];
GVNews.DataSource = dt.DefaultView;
GVNews.DataBind();
}
protected void GVNews_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
string newsID = GVNews.DataKeys[e.RowIndex].Value.ToString();
sql = string.Format("delete from newsTable where newsID={0}", Convert.ToInt32(newsID));
int i = DataBase.ExecuteNonQuery(sql);
if (i > 0)
{
BindGVNews();
}
}
protected void GVNews_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
GVNews.PageIndex = e.NewPageIndex;
BindGVNews();
}
protected void GVNews_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
((ImageButton)e.Row.FindControl("ImgDel")).Attributes.Add("onclick", "return confirm('确定要删除吗？')");
((CheckBox)e.Row.FindControl("CBDelete")).Attributes.Add("onclick", "CBDeleteClick('"+((CheckBox)e.Row.FindControl("CBDelete")).ClientID+"')");
}
}
string GetDeleteIDs()
{
string IDs = null;
foreach (GridViewRow gvr in GVNews.Rows)
{
CheckBox cb = (CheckBox)gvr.FindControl("CBDelete");
if (cb.Checked)
{
if (IDs == null)
{
IDs = GVNews.DataKeys[gvr.RowIndex].Value.ToString();
}
else
{
IDs = IDs+"," + GVNews.DataKeys[gvr.RowIndex].Value.ToString();
}
}
}
return IDs;
}
protected void BtnDelete_Click(object sender, ImageClickEventArgs e)
{
string newsIDs = this.GetDeleteIDs();
if (newsIDs != null)
{
sql = string.Format("delete from newsTable where newsID in ({0})", newsIDs);
int i = DataBase.ExecuteNonQuery(sql);
if (i > 0)
{
BindGVNews();
}
}
else
{
Response.Write("<script>alert('请指定要删除的项！');</script>");
}
}
}