Admin/Login.aspx.cs

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using System;
using System.Collections.Generic;

using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

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

    }
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        if (TextBox2.Text.ToString().Trim() == "" || TextBox1.Text.ToString().Trim() == "")
        {
            Response.Write("<script>javascript:alert('请输入完整');history.back();</script>");
            Response.End();
        }
        else
        {
            string membername = this.TextBox1.Text.Trim();
            string pwd = TextBox2.Text;
            string sql1 = "select * from TB_Admin where UserName='{0}' and Password='{1}'";
            string sql2 = string.Format(sql1, membername, pwd);
            DataTable dt = DBHelper.GetDataSet(sql2).Tables[0];
            if (dt.Rows.Count>0)
            {
                Session["username"] = this.TextBox1.Text;
                Response.Redirect("manage.aspx");
            }
            else
            {
                Response.Write("<script>javascript:alert('对不起，用户名或密码不正确!');</script>");
            }
        }
    }
}