index.aspx.cs

留言板得源代码 是初学网络的较好代码

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 Aspnet
{
	/// <summary>
	/// index 的摘要说明。
	/// </summary>
	public class index : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.HyperLink HyperLink1;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.TextBox TB_name;
		protected System.Web.UI.WebControls.TextBox TB_pwd;
		protected System.Web.UI.WebControls.RadioButtonList RBL_type;
		protected System.Web.UI.WebControls.Button BT_submit;
		protected System.Web.UI.WebControls.RequiredFieldValidator RFV_name;
		protected System.Web.UI.WebControls.RequiredFieldValidator RFV_pwd;
		protected System.Web.UI.WebControls.Button BT_cancel;
		protected string selectstr;
	
		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.BT_submit.Click += new System.EventHandler(this.BT_submit_Click);
			this.BT_cancel.Click += new System.EventHandler(this.BT_cancel_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void BT_submit_Click(object sender, System.EventArgs e)
		{
			string strconn="server=localhost;database=Aspnet;uid=sj;pwd=";
			SqlConnection Conn=new SqlConnection(strconn);
			if(RBL_type.SelectedItem.Value.ToString()=="普通用户")
			{
				selectstr="select count(*) from UserInfo where UserName like '"+TB_name.Text+"' and Pwd like '"+TB_pwd.Text+"'";				
			}
			else
			{
				selectstr="select count(*) from AdminInfo where AdminID like '"+TB_name.Text+"' and Adminpwd like '"+TB_pwd.Text+"'";
			}
			Session["type"]=RBL_type.SelectedItem.Value.ToString();
			SqlCommand mycommand=new SqlCommand(selectstr,Conn);
			Conn.Open();
			int flag=(int)mycommand.ExecuteScalar();
			Conn.Close();
			if(flag>0)//用户存在
			{
				Session["UserName"]=TB_name.Text;
				Response.Redirect("Viewmessage.aspx");
			}
			else
			{
				Label1.Text="对不起，用户名和密码不符，请重新输入！";
				TB_name.Text="";
				TB_pwd.Text="";
			}		
		}

		
		private void BT_cancel_Click(object sender, System.EventArgs e)
		{
			TB_name.Text="";
			TB_pwd.Text="";
		}
	}
}