denglu.aspx.cs

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

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

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (TextBox1.Text == "")
        {
            Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('请输入用户名！');</script>");
            return;
        }

        if (TextBox2.Text == "")
        {
            Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('请输入密码！');</script>");
            return;
        }

        DataSet ds = DbHelperSQL.Query("select * from members where lname='" + TextBox1.Text + "' and pass='" + TextBox2.Text + "'");

        //判断用户是否存在
        if (ds.Tables[0].Rows.Count > 0)
        {
            DataRow dr = ds.Tables[0].Rows[0];
            //把用户信息存入到Session
            Session["lname"] = dr["lname"].ToString();
            //跳转          
            Response.Redirect("Default.aspx");
        }
        else
        {
            Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "<script>alert('用户名或密码错误！');</script>");
            return;
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {

    }
}