using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Web;
using?System.Web.UI;
using?System.Web.UI.WebControls;
using?System.Data;
using?System.Data.OleDb;

public?partial?class?UserCheck?:?System.Web.UI.Page
{
????protected?void?Page_Load（object?sender?EventArgs?e）
????{

????}
????protected?void?txtUName_TextChanged（object?sender?EventArgs?e）
????{
????????Label1.Text?=?““;
????????System.Threading.Thread.Sleep（300）;
????????if?（checkUName（txtUName.Text）?==?1）
????????????Label1.Text?=?“該用戶名已經存在“;????????????
????????else
????????????Label1.Text?=?“該用戶名不存在，可以注冊“;
????}
????protected?int?checkUName（string?uName）?{
????????int?flag?=?0;
????????using?（OleDbConnection?conn?=?new?OleDbConnection（@“Provider=Microsoft.ACE.OLEDB.12.0;Data?S

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-05-23?17:21??AjaxNoRefresh\App_Data\
?????文件??????425984??2019-05-23?17:21??AjaxNoRefresh\App_Data\AjaxDB.accdb
?????文件????????7936??2019-05-23?16:47??AjaxNoRefresh\UserCheck.aspx
?????文件????????1188??2019-05-23?16:29??AjaxNoRefresh\UserCheck.aspx.cs
?????文件?????????277??2019-05-23?15:42??AjaxNoRefresh\web.config