admin/adminlogin.aspx.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Data.SqlClient;
using System.Data;

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

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string str = "";
        if (TextBox1.Text == "")
        {
            str = "用户名不能为空！";
        }

        else if (TextBox2.Text == "")
        {
            str = "密码不能为空！";
        }
        else
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append(@" select * from admin ");
            strSql.Append(@" where lname=@lname and pwd=@pwd");
            SqlParameter[] parameters = new SqlParameter[] {
            new SqlParameter("@lname", SqlDbType.VarChar,50),
            new SqlParameter("@pwd", SqlDbType.VarChar,50)     };
            parameters[0].Value = TextBox1.Text;
            parameters[1].Value = TextBox2.Text;
            SqlDataReader sdr = DbHelperSQL.ExecuteReader(strSql.ToString(), parameters);
            if (sdr.Read())
            {
                Session["aid"] = sdr["aid"].ToString();
                Session["name"] = sdr["lname"].ToString();
                Session["power"] = "网站管理员";
                Response.Redirect("index.aspx");

            }
            else
            {
                str = "该用户名或密码错误。";
            }
        }

        //弹出提示信息
        MessageBox.Show(this, str);
    }
}