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

    }
    protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        string yhm = this.yhm.Text;//用户名
        string mm = this.mm.Text;//密码
        string qx = this.qx.Text;
        if (yhm.Length == 0)
        {
            MessageBox.Show(this.Page, "用户名名不能为空");
            return;
        }
        if (mm.Length == 0)
        {
            MessageBox.Show(this.Page, "密码不能为空");
        }
        string wheresql = " and yhm='" + yhm + "' and mm='" + mm + "'";
        string sql = "";

        if (qx == "学生")
        {
            sql = "select * from xuesheng where 1=1";
        }
        else {
            sql = "select * from jiaoshi where 1=1 and qx='"+qx+"'" ;
        }
        DataTable dt = DBHelper.GetDataSet(sql);
        if (dt.Rows.Count > 0)
        {


         //   Session["id"] = dt.Rows[0]["id"].ToString();
            Session["yhm"] = yhm;
            Session["mm"] = mm;
            Session["qx"] = qx;
            Session["bj"] = dt.Rows[0]["bj"].ToString();
            Response.Redirect("index.htm");
        }
        else
        {
            MessageBox.Show(this, "您输入的用户名或密码不正确");

            return;