1 <script type="text/javascript">
2 $(document).ready(function (e) {
3
4 $("#btn").click(function(e){
5 //取值
6 var uid = $("#txtUid").val();
7
8 //调AJax
9 $.ajax({
10
11 url: "Check.aspx", //处理页面
12 type: "POST", //数据提交方式
13 data: { uid: uid }, //要传输的数据，JSON格式
14 datatype: "TEXT", //返回数据格式
15 success: function (data) { //回调函数
16
17 alert(data);
18
19 }
20 });
21
22 })
23
24 })
25
26 </script>
Check.aspx页面
string uid = Request["uid"].ToString();
TextDataContext _context = new TextDataContext();
var query = _context.login.Where(p => p.userName == uid);
if (query.Count() > 0)
{
Response.Write("该用户名存在！");
}
else
{
Response.Write("该用户名可以使用！");
}
Response.End();