WebSite/UserLogin.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;

using Entities;
using NBear.Data;
using NBear.Common;
using NBear.Web.UI;

public partial class UserLogin : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }
    protected void btnLogin_Click(object sender, EventArgs e)
    {
        string UserName = tbUserName.Text.Trim();
        string Password = tbPassword.Text.Trim();
        Entities.User[] aUser = Gateways.SdaiBuy.From<Entities.User>()
            .Where(Entities.User._.UserName == UserName)
            .Where(Entities.User._.Password == Password)
            .ToArray<Entities.User>();
        lblError.Text = "";

        //获的从哪里转到登陆的，登陆后返回原来的地方
        string FromURL;
        if(Request.Params ["fromurl"]!=null )
        {
            FromURL = Request.Params["fromurl"];
        }else
        {
            FromURL = Request.UrlReferrer.ToString();
        }

        if (aUser.Length > 0)
        {
            Session["UserName"] = aUser[0].UserName;
            Session["UserID"] = aUser[0].ID;
            Response.Redirect(FromURL);
        }
        else
        {
            lblError.Text = "用户名密码错误！";
        }
    }
}