login.aspx.cs

来自「一个比较不错的专门为技术型站点订制的专业论坛源码」· CS 代码 · 共 88 行

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace bbs
{
	/// <summary>
	/// Summary description for login.
	/// </summary>
	public class login : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox UserName;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
		protected System.Web.UI.WebControls.TextBox Password;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
		protected System.Web.UI.WebControls.Label errormessage;
		protected System.Web.UI.WebControls.Button Button1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// Put user code to initialize the page here
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{
			if(Page.IsValid)
			{
				if(IsUserIdentify())
				{
					Response.Redirect(Request["returnurl"]);
				}
				else
				{
					this.errormessage.Visible = true;
				}
			}
		}

		private bool IsUserIdentify()
		{
			SqlConnection conn = new SqlConnection((string)Application["ConnectionString"]);
			conn.Open();
			string sql = "select id from Users where UserName = '" + this.UserName.Text + "' and Password = '" + this.Password.Text + "'";
			SqlCommand cmd = new SqlCommand(sql,conn);
			SqlDataReader reader = cmd.ExecuteReader();
			if(reader.Read())
			{
				Session["userid"] = reader["id"].ToString();
				return true;
			}
			else
			{
				return false;
			}
		}
	}
}