guestbook_main.aspx.cs

这是一个ASP.NET和数据库的程序

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;
using System.Configuration;
namespace baogelyb
{
	/// <summary>
	/// guestbook_main 的摘要说明。
	/// </summary>
	public class guestbook_main : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label name;
		protected System.Web.UI.WebControls.Label content;
		protected System.Web.UI.WebControls.TextBox replytime;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
		protected System.Web.UI.WebControls.TextBox replycontent;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.Button Button2;
	    
		private void Page_Load(object sender, System.EventArgs e)
		{
			if(Session["name"]==null||Session["name"].ToString()=="false")
			{
				Response.Redirect("fail.htm");
			}
			if(!IsPostBack)
			{
				CDataBind();
			}
		}


		private void CDataBind()
		{
			
			//			string Addtime=DateTime.Now.ToString().Substring(0,10);
			int CID=Convert.ToInt32(Request.QueryString["id"].Trim());
			//取得数据库路径
//			string dbPath=System.Configuration.ConfigurationSettings.AppSettings["lyb"];
//			//定义连接字符串
//			string ACconnStr="Provider=Microsoft.Jet.Sql.4.0;Data Source="+Server.MapPath(dbPath);
			//创建数据库对像
			SqlConnection ACconn=db.createconnection();
			//数据库操作
			try
			{
				ACconn.Open();
				//取得所需操作的记录ID

				//定义SQL语句
				string ACsql="select * from lyb where id="+CID;
				//创建Command对像
				SqlCommand ACcomm=new SqlCommand(ACsql,ACconn);
				//通过执行Command实例化DataReader类
				SqlDataReader ACdr=ACcomm.ExecuteReader();
				
				if(ACdr.Read())
				{
					
					this.name.Text=ACdr["name"].ToString();
					this.content.Text=ACdr["content"].ToString();
					this.replytime.Text=ACdr["replytime"].ToString();
					this.replycontent.Text=ACdr["replycontent"].ToString().Replace("<br>","\r\n");
                    
					//					this.Addtime.Text=ACdr["Addtime"].ToString().Substring(0,8);
					//					this.Addtime.Text=ACdr["Addtime"].ToString("yyyy-MM-dd");
				
					ACdr.Close();

				}
					
				else
				{
					Response.Write("对不起，请先填加留言");
				}
			
			}
			catch(Exception ex)
			{
				Response.Write(ex.ToString());
			}
			finally
			{
				ACconn.Close();

			}
		}
		#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.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Button2.Click += new System.EventHandler(this.Button2_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{
			//取得数据库路径
//			string dbPath=System.Configuration.ConfigurationSettings.AppSettings["lyb"];
//			//定义连接字符串
//			string ACconnStr="Provider=Microsoft.Jet.Sql.4.0;Data Source="+Server.MapPath(dbPath);
			//创建数据库连接对像
			SqlConnection ACconn=db.createconnection();
			//操作数据库
			try
			{
			
				int CID=Convert.ToInt32(Request.QueryString["id"].Trim());
				ACconn.Open();
				//定义所需SQL
				string ACsql="Update lyb set name='"+name.Text+"',content='"+this.content.Text+"',replycontent='"+this.replycontent.Text.ToString().Replace("\r\n","<br>")+"',replytime='"+this.replytime.Text+"' where id="+CID;

				//创建Command对像
				SqlCommand ACcomm=new SqlCommand(ACsql,ACconn);
				ACcomm.ExecuteNonQuery();
				Response.Write("<script>alert('留言回复成功');</script>");


			}
			catch(Exception ex)
			{
				Response.Write(ex.ToString());
			}
			finally
			{
				ACconn.Close();
			}
		}

		private void Button2_Click(object sender, System.EventArgs e)
		{
			this.replytime.Text="";
			this.replycontent.Text="";
		}
	}
}