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 login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            cx.Items.Add("管理员");
            cx.Items.Add("教师");
            cx.Items.Add("学生");
        }
    }
    protected void btLogin_Click(object sender, ImageClickEventArgs 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 = "";
        if (cx.Text.ToString().Trim()=="管理员")
        {
            sql = "select * from allusers where username='" + TextBox2.Text.ToString().Trim() + "' and pwd='" + TextBox1.Text.ToString().Trim() + "'";
        }
        if (cx.Text.ToString().Trim() == "学生")
        {
            sql = "select * from xuesheng where xuehao='" + TextBox2.Text.ToString().Trim() + "' and mima='" + TextBox1.Text.ToString().Trim() + "'";
        }
        if (cx.Text.ToString().Trim() == "教师")
        {
            sql = "select * from jiaoshi where yonghuming='" + TextBox2.Text.ToString().Trim() + "' and mima='" + TextBox1.Text.ToString().Trim() + "'";
        }
        //Response.Write(sql);
        //Response.End();
        DataSet result = new DataSet();
        result = new Class1().hsggetdata(sql);
        // result = new TestOnline.Class1().hsggetdata(sql);
        if (result != null)
        {
            if (result.Tables[0].Rows.Count > 0)
            {
                Session["username"] = TextBox2.Text.ToString().Trim();

                if (cx.Text.ToString().Trim() == "管理员")
                {