editmsg.aspx.cs

ASP.NET实战编程(六) 电子商务系统

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.OleDb;

namespace txl
{
	/// <summary>
	/// editmsg 的摘要说明。
	/// </summary>
	public class editmsg : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox txtTheme;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
		protected System.Web.UI.WebControls.TextBox txtContent;
		protected System.Web.UI.WebControls.Label lblName;
		protected System.Web.UI.WebControls.Label lblDate;
		protected System.Web.UI.WebControls.Button btnOK;
		protected System.Web.UI.WebControls.Button btnReturn;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
		OleDbConnection cn;
		OleDbCommand cmd;
		OleDbDataReader dr;
		//OleDbDataAdapter da;
		//DataSet ds;
		string strConn,strSQL;
		public string strClid;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			if(Session.Count==0) Page.Response.Redirect("default.aspx");
			else 
				if(Session["uid"].ToString()=="") Page.Response.Redirect("default.aspx");
			
			
			strConn="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+Server.MapPath("txl.mdb");					
			cn=new OleDbConnection(strConn);
			cn.Open();
			strSQL="select b_uid,cl_m1,cl_m2,b_clid from board,classinfo where cl_id=(select b_clid from board where b_id="+Page.Request["msgid"].ToString()+") and b_id="+Page.Request["msgid"].ToString();
			cmd=new OleDbCommand(strSQL,cn);
			dr=cmd.ExecuteReader();
			while(dr.Read())
				if(!(Session["uid"].ToString()==dr[0].ToString()|Session["uid"].ToString()==dr[1].ToString()|Session["uid"].ToString()==dr[2].ToString()))
				{
					strClid=dr["b_clid"].ToString();
					dr.Close();
					cn.Close();
					Page.Response.Redirect("board.aspx?clid="+strClid);					
				}
			dr.Close();

			strSQL="select b_clid from board where b_id="+Page.Request["msgid"].ToString();
			cmd=new OleDbCommand(strSQL,cn);
			dr=cmd.ExecuteReader();
			while(dr.Read())
				strClid=dr[0].ToString();
			dr.Close();
			


			strSQL="select b_theme,b_cnt,b_date,u_name from board,userinfo where u_id=(select b_uid from board where b_id="+Page.Request["msgid"].ToString();
			strSQL+=") and b_id="+Page.Request["msgid"].ToString();	
			cmd=new OleDbCommand(strSQL,cn);
			dr=cmd.ExecuteReader();
			if(!Page.IsPostBack)
				while(dr.Read())
				{
					txtTheme.Text=dr[0].ToString();
					txtContent.Text=dr[1].ToString();
					lblName.Text=dr[3].ToString();
					lblDate.Text=dr[2].ToString();
				
				}
			dr.Close();
			cn.Close();
			

		}

		#region Web Form Designer generated code
		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.btnOK.Click += new System.EventHandler(this.btnOK_Click);
			this.btnReturn.Click += new System.EventHandler(this.btnReturn_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btnOK_Click(object sender, System.EventArgs e)
		{
			strConn="Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+Server.MapPath("txl.mdb");
			strSQL="Update board SET b_theme='"+txtTheme.Text;
			strSQL+="',b_cnt='"+txtContent.Text;
			strSQL+="',b_editer="+Session["uid"].ToString();
			strSQL+=",b_edittime=Now() where b_id="+Page.Request["msgid"].ToString();
			cn=new OleDbConnection(strConn);
			cn.Open();
			cmd=new OleDbCommand(strSQL,cn);
			cmd.ExecuteNonQuery();
			cmd.Dispose();

			
			cn.Close();
			
			Page.Response.Redirect("board.aspx?clid="+strClid);


			/*Page.Response.Write(txtTheme.Text);
			Page.Response.Write("<br>");
			Page.Response.Write(txtContent.Text);
			Page.Response.Write("<br>");
			Page.Response.Write(strClid);*/
		}

		private void btnReturn_Click(object sender, System.EventArgs e)
		{
			Page.Response.Redirect("board.aspx?clid="+strClid);
		}
	}
}