Register.aspx.cs

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

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

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        bool ReName = false;
        //判断用户名是否存在
        ReName = RepeatName();
        //如果用户名不存在与所有控件验证都通过的时候
        if (Page.IsValid && ReName)
        {
            UserInfo user = new UserInfo();
            user.UserName = UserName.Text;
            user.Name = Name.Text;
            user.Password = PassWord.Text;
            user.Email = Email.Text;
            user.Address = Address.Text;
            user.DateTime = DateTime.Now.Date;
            UserLogin.Add(user);

            //以用户登录身份跳到主页
            Response.Redirect("Default.aspx");
        }
        else Response.Write("<script>alert('注册失败')</script>");
    }
    protected void RepeatBtn_Click(object sender, EventArgs e)
    {
        bool ReName = RepeatName();//判断用户名是否存在
    }
    public bool RepeatName()
    {
         string name = UserName.Text;//获取用户的输入
        if (UserLogin.RepeatName(name) > 0)        //判断用户是否存在
        {
            Response.Write("<script>alert('用户名存在')</script>");
            return false;
        }
        else
        {
            Response.Write("<script>alert('恭喜你，用户名不存在')</script>");
            return true;
        }
    }