页面异步获取数据

页面regist.aspx：

<script type="text/javascript">
function CheckEmail(obj) {
var email = obj.value;
$.ajax({
type: "POST",
url: "regist.aspx", //提交给自己
data: { "checkmail": email},
timeout: 10000,
success: function(data) {
var myinfo = eval('(' + data + ')');
CheckEmailComplete(myinfo.info);
}
});
}

页面代码regist.aspx.cs

protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { if (Request["checkmail"] != null) {//异步获取 ReturnJson(); return; } } } string CheckMail(string mail) { string mymail = mail.Trim(); if(mymail.Length == 0) return "请输入邮箱"; Regex rm = new Regex(@"\w+(?:[-+.]\w+)*@\w+(?:[-.]\w+)*\.\w+(?:[-.]\w+)*",RegexOptions.IgnoreCase); if (!rm.IsMatch(mymail)) { return "邮箱格式不对"; } SqlParameter[] sqlParas = { new SqlParameter("@UserEmail", mymail) }; string sql =@"SELECT TOP 1 WebUserId FROM WebUser WHERE UserEmail=@UserEmail"; if (SQLHelper.DBHelper.ExecuteScalar(CommandType.Text, sql, sqlParas) != null) { return "已被注册,<a href='Login.aspx' class='blue'><u>登录</u>?</a>"; } return ""; } void ReturnJson() { string info = CheckMail(Request["checkmail"]); string json = String.Format(@"{{""info"":""{0}""}}", info); Response.Clear(); Response.Write(json); Response.End(); }