Login.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;
using System.Data.SqlClient;
using System.Drawing;//引入命名空间

public partial class Login : System.Web.UI.Page
{
    DB db=new DB();
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string uname = AdminName.Text;
        string upwd = AdminPwd.Text;
        string sql = "select * from Admin where AdminName='" + uname + "'and AdminPwd='" + upwd + "'";
        SqlDataReader dr = db.reDr(sql);

        string yzm = txtValidateNum.Text;
        if (Session["image"].ToString() == yzm)
        {
            if (dr.Read() == true)
            {
                Session["AdminPwd"] = dr["AdminPwd"].ToString(); //保存密码到Session

                //Session["power"] = dr["AdminPower"].ToString();
                Response.Redirect("~/Admins/Main.aspx");
            }
            else
            {
                Label1.Text=("用户名或密码错误，请返回检查！");
            }
        }
        else
        {
            Label1.Text = ("验证码格式错误");
        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        Response.Redirect("Login.aspx");
    }
}