admin.aspx.cs

这是我制作的一个小论坛源码··能够简单实现发表帖子··管理帖子·后台管理等功能

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 bbs
{
	/// <summary>
	/// admin 的摘要说明。
	/// </summary>
	public class houtai : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox TextBox_PWD;
		protected System.Web.UI.WebControls.Button Button_login;
		protected System.Web.UI.WebControls.TextBox TextBox_UserName;
		protected System.Web.UI.WebControls.Button Button_Clear;
	
		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.Button_login.Click += new System.EventHandler(this.Button_login_Click);
			this.Button_Clear.Click += new System.EventHandler(this.Button_Clear_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button_login_Click(object sender, System.EventArgs e)
		{
			string ConnectionString=System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
			string sqlstr="select * from users where username='"+this.TextBox_UserName.Text+"'and pwd='"+this.TextBox_PWD.Text+"' and iPowerLevels=2";

			SqlConnection conn = new SqlConnection(ConnectionString);
			SqlCommand cmd=new SqlCommand(sqlstr,conn);
			try
			{
				
				if(conn.State!=ConnectionState.Open)
				{
					conn.Open();
				}
				int count=Convert.ToInt32(cmd.ExecuteScalar());
				if(count>0)
				{
				
					Session["UserName"]=this.TextBox_UserName.Text;
					Response.Redirect("Manage.aspx");

				}
				else
				{
					Response.Write("用户名不存在或密码不正确!");
				}

			
			}
			catch(Exception ex)
			{	
				Response.Write(ex.Message);
				conn.Close();
			}
			finally
			{		
				conn.Close();
				conn.Dispose();
				conn=null;
			}
		}

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