editproduct.aspx.cs

一个手机电子商务网站 包含物品展示

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 MobileShop
{
	/// <summary>
	/// EditProduct 的摘要说明。
	/// </summary>
	public class EditProduct : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.HyperLink HyperLink1;
		protected System.Web.UI.WebControls.Button btnEdit;
		protected System.Web.UI.WebControls.TextBox txtProductID;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Label Label4;
		protected System.Web.UI.WebControls.TextBox txtUnitCost;
		protected System.Web.UI.WebControls.TextBox txtIntroduce;
		protected System.Web.UI.WebControls.Label Label5;
		protected System.Web.UI.WebControls.TextBox txtPicture;
		protected System.Web.UI.WebControls.Label Label6;
		protected System.Web.UI.WebControls.Label Label3;
		
	
		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(!IsPostBack)
			{
				ProductDetailDisplay();
			}
		}

		protected void ProductDetailDisplay()
		{	
			string ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=";
			ConnectionString += Server.MapPath("MobileShop.mdb");
			OleDbConnection conn = new OleDbConnection(ConnectionString);

			string SelectSqlString = "Select ProductID,UnitCost,Picture,Introduce From Product Where ID="
				+ Request.QueryString["ID"];
			
			conn.Open();
			OleDbCommand SelectCmd = new OleDbCommand(SelectSqlString, conn);

			try
			{
				OleDbDataReader dr = SelectCmd.ExecuteReader(CommandBehavior.CloseConnection); 
				dr.Read();
                txtProductID.Text = dr.GetString(0);
				txtUnitCost.Text = dr.GetDouble(1).ToString();
				txtPicture.Text = dr.GetString(2);
				txtIntroduce.Text = dr.GetString(3);
			}
			catch(Exception err)
			{
				Response.Write(err.Message);
			}
			finally
			{
				conn.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.btnEdit.Click += new System.EventHandler(this.btnEdit_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btnEdit_Click(object sender, System.EventArgs e)
		{

			string ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=";
			ConnectionString += Server.MapPath("MobileShop.mdb");
			OleDbConnection conn = new OleDbConnection(ConnectionString);

			string UpdateSqlString = "Update Product Set ProductID='" + txtProductID.Text + "',"
				+ "UnitCost='" + txtUnitCost.Text + "',"
				+ "Picture='" + txtPicture.Text + "',"
				+ "Introduce='" + txtIntroduce.Text + "' where ID=" 
				+ Request.QueryString["ID"];
			OleDbCommand UpdateCmd = new OleDbCommand(UpdateSqlString, conn);

			conn.Open();
			try
			{
				UpdateCmd.ExecuteNonQuery();
				Label6.Visible = true;
			}
			catch(Exception err)
			{
				Response.Write(err.Message);
			}
			finally
			{
				conn.Close();
			}
		}
	}
}