user/detection.aspx.cs

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
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;

public partial class user_detection : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // 检测用户名是否已被使用
        if (Request.QueryString["username"] != null)
        {
            Regular regex = new Regular();
            SqlStore sql = new SqlStore();
            string username = Request.QueryString["username"];
            if (regex.IsUserName(username) && !sql.UserNameJudge(username))
                Response.Write("alert('恭喜您，该用户名可以使用！');");
            else
                Response.Write("alert('抱歉，该用户名已经被注册，请尝试其他名称！');");
        }
        Response.End();
    }
}