login.aspx.cs

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

namespace WebNews
{
	/// <summary>
	/// Login 的摘要说明。
	/// </summary>
	public class Login : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.TextBox TextUserId;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
		protected System.Web.UI.WebControls.LinkButton LinkButtonLogin;
		protected System.Web.UI.WebControls.Label LabMessage;
		protected System.Web.UI.WebControls.TextBox TextPassword;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.LinkButtonLogin.Click += new System.EventHandler(this.LinkButtonLogin_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void BtnRegister_Click(object sender, System.EventArgs e)
		{
			Response.Redirect("register.aspx");
		}

		private void LinkButtonLogin_Click(object sender, System.EventArgs e)
		{
			Response.Write("登录页面");

			int num;

			string userId = this.TextUserId.Text.Trim();
			string password = this.TextPassword.Text.Trim();

			SqlConnection conn = new SqlConnection();
			conn.ConnectionString = App_Data.ClassConnection.CONN_STRING;
			conn.Open();

			SqlCommand cmd = new SqlCommand("select count(*) from users where userID='"+userId+"' and password='"+password+"'",conn);
			num = Convert.ToInt32(cmd.ExecuteScalar());

			if(num == 1)
			{
				this.LabMessage.Text = "登录成功";
				Session["userId"] = this.TextUserId.Text.Trim();

				if(Session["title"].ToString() != "" && Session["link"].ToString() != "")
				{
					Response.Redirect("AddCollection.aspx");
				}
				else
				{
					Response.Redirect("MyAcount.aspx");
				}
			}
			else
			{
				this.LabMessage.Text = "登录失败";
			}
		}
	}
}