Web/admin/login.aspx.cs

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using System;
using System.Collections;
using System.Configuration;
using System.Data;
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;

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

    }
    protected void reset_Click(object sender, EventArgs e)
    {
        this.username.Text = "";
        this.password.Text = "";

    }

    protected void logins_Click(object sender, EventArgs e)
    {
        string sql = "select * from admin where username='"+username.Text+"' and password='"+password.Text+"' and power='"+this.DropDownList1.Text+"'";
        DataSet ds = Bll.DbHelperSQL.Query(sql);
        if (ds.Tables[0].Rows.Count != 0)
        {
            Session["admin"] = ds.Tables[0].Rows[0]["username"].ToString();
            Session["name"] = ds.Tables[0].Rows[0]["realName"].ToString();
            Session["power"] = ds.Tables[0].Rows[0]["power"].ToString();
            Session["id"] = ds.Tables[0].Rows[0]["id"].ToString();
            Session["zwid"] = ds.Tables[0].Rows[0]["zwid"].ToString();
           
            Response.Redirect("Main.aspx");
        
        }
    }
}