全部选中与取消操作,选中后的删除(ajax)实现无刷新效果

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现在我们在编程的时刻总是要利用一些最新的技术去解决问题。。。。下面是我用ajax与jequery结合在一起使用的一个实例。希能给一起学习的朋友们带来帮助。

前台代码:<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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>用户信息操作</title>
<script language="javascript" type="text/javascript" src="ajax/jquery.js"></script>
<script language="javascript" type="text/javascript">
//页面的初始化
$(document).ready( function(){ loadUserInfo(); });
//加载用户信息到页面
function loadUserInfo()
{
$.ajax(
{
type:"POST",
url:"Default.aspx",
data:{action:'action'},
success:loadUserInfoCallbace
}
);
}
//页面初始化回调函数
function loadUserInfoCallbace(r)
{
if(r=="")
{
$("#userInfo").html("暂无数据");
}
else
{
$("#userInfo").html(r);
}
}
//全部选中
function CheckAll(obj)
{
$("input[@type=checkbox][@name=checkItem]").attr("checked",$(obj).attr("checked"));
}
//收集所有选中项
function NumberID()
{
var allcheckboxs=$("input[@type=checkbox][@name=checkItem][checked]");
var ids="";
for(i=0;i<allcheckboxs.length;i++)
{
var id=$(allcheckboxs[i]).attr("id").split("_")[1];
ids+=id;
ids+=",";
}
return ids;

}
//删除用户
function DeleteUser()
{

if(!window.confirm("您真的要删除选中用户信息吗?"))
{
return;
}
var ids=NumberID();
$.ajax({
type:'POST',
url:'Default.aspx',
data:{action:'Delete',userid:ids},
success:deleteUserCall
});
}
//删除用户回调函数
function deleteUserCall(r)
{
if(r=="ok")
{
alert("删除成功");
loadUserInfo();
}
else
{
alert("失败");
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div style="text-align:center" id="userInfo">

</div>

</form>
</body>
</html>

后台代码:

using System;
using System.Data;
using System.Configuration;
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;
using System.Data.SqlClient;
using System.Text;

public partial class _Default : System.Web.UI.Page
{
string Straction = "";
protected void Page_Load(object sender, EventArgs e)
{
Straction = Request["action"];
if(Straction=="action")
{
UserInfo();
}
if (Straction == "Delete")
{
DeleteUser();
}
}
/// <summary>
/// 周昕 2009-6-8号加载用户详细信息
/// </summary>
public void UserInfo()
{
SqlConnection mycon = new SqlConnection();
mycon.ConnectionString = ConfigurationManager.ConnectionStrings["BoBoConn"].ToString();
string sql = "select * from loginuser";
SqlCommand mycom = new SqlCommand(sql, mycon);
mycon.Open();
SqlDataReader myda = mycom.ExecuteReader();
StringBuilder str = new StringBuilder();
str.Append("<table><tr><td><input id='checkall' name='checkall' type='checkbox' onclick='CheckAll(this)'/>全选</td><td>用户名</td><td>用户全名</td></tr>");
while (myda.Read())
{
str.Append("<tr><td>");
str.Append("<input id='checkItem_" + myda["ID"].ToString() + "' type='checkbox' name='checkItem' style='text-align='left' onclick=' NumberID()'/></td>");
str.Append("<td>" + myda["UserName"].ToString() + "</td>");
str.Append("<td>" + myda["FullName"].ToString() + "</td></tr>");
}
str.Append("</table>");
str.Append(" <div style=' text-align:center'><input type='button' value='删除' onclick='DeleteUser()' /></div>");
Response.Clear();
Response.ContentType = "application/text";
Response.Write(str);
Response.End();
}
/// <summary>
/// 周昕 2009-6-8 删除选中用户的详细信息
/// </summary>
public void DeleteUser()
{
//获取用户ID
string strID = Request["userid"];
string Userid = strID.Substring(0, strID.Length - 1);
//转换成为数组
string[] stridArray = Userid.Trim().Split(',');
string sql = "delete from loginuser where ID='" + stridArray[0].ToString() + "'";
for (int i = 0; i < stridArray.Length; i++)
{
string id = stridArray[i].ToString();

sql += "or ID='" + id + "'";
}
SqlConnection mycon = new SqlConnection();
mycon.ConnectionString = ConfigurationManager.ConnectionStrings["BoBoConn"].ToString();
mycon.Open();
SqlCommand mycom = new SqlCommand(sql, mycon);
int n = (int)mycom.ExecuteNonQuery();
mycon.Close();
if (n > 0)
{
Response.Clear();
Response.ContentType = "application/text";
Response.Write("ok");
Response.End();
}
else
{
Response.Clear();
Response.ContentType = "application/text";
Response.Write("no");
Response.End();
}
}
}