Admin/Login.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;

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();
        }
        string sql;




        sql = "select * from [User] where u_Num='" + TextBox1.Text.ToString().Trim() + "' and u_PWD='" + TextBox2.Text.ToString().Trim() + "' and Role='管理员'";
        DataSet result = DBHelper.GetDataSet(sql);
        if (result != null)
        {
            if (result.Tables[0].Rows.Count > 0)
            {
                Session["username"] = TextBox1.Text.ToString().Trim();
                Session["cx"] =result.Tables[0].Rows[0]["Role"].ToString();
                Session["PWD"] = this.TextBox2.Text;
                Response.Redirect("main.aspx");
            }
            else
            {
                Response.Write("<script>javascript:alert('对不起，用户名或密码不正确!');history.back();</script>");
            }
        }
        else
        {
            Response.Write("<script>javascript:alert('对不起，系统错误，请不要越权操作!');</script>");
        }

    }
}