addproduct.aspx.cs

来自「一个手机电子商务网站 包含物品展示」· CS 代码 · 共 142 行

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>
	/// ShowProduct 的摘要说明。
	/// </summary>
	public class ShowProduct : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.Label Label3;
		protected System.Web.UI.WebControls.Label Label4;
		protected System.Web.UI.WebControls.TextBox txtProductID;
		protected System.Web.UI.WebControls.TextBox txtUnitCost;
		protected System.Web.UI.WebControls.TextBox txtIntroduce;
		protected System.Web.UI.WebControls.HyperLink HyperLink1;
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator1;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator2;
		protected System.Web.UI.WebControls.RequiredFieldValidator RequiredFieldValidator3;
		protected System.Web.UI.WebControls.Label Label5;
		protected System.Web.UI.WebControls.TextBox txtPicture;
		protected System.Web.UI.WebControls.Button btnAdd;
	
		private void Page_Load(object sender, System.EventArgs e)
		{

		}

		#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.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
			this.Button1.Click += new System.EventHandler(this.btnAdd_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btnAdd_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 InsertSqlString;
			//string InsertSqlString1 = "Insert into Product(Manufacturer,ProductID,UnitCost,Introduce";
			//string InsertSqlString2 = ") Values ('";
			//InsertSqlString2 += Request.QueryString["Manufacturer"] + "','";
			//InsertSqlString2 += txtProductID.Text.Trim() + "','";
			//InsertSqlString2 += txtUnitCost.Text.Trim() + "','";
			//InsertSqlString2 += txtIntroduce.Text.Trim();
			string InsertSqlString = "Insert into Product(Manufacturer,ProductID,UnitCost,Introduce,Picture) Values ('";
			InsertSqlString += Request.QueryString["Manufacturer"] + "','";
			InsertSqlString += txtProductID.Text.Trim() + "','";
			InsertSqlString += txtUnitCost.Text.Trim() + "','";
			InsertSqlString += txtIntroduce.Text.Trim() + "','"; 

			if(txtPicture.Text.Trim() != "")
			{
				InsertSqlString += txtPicture.Text.Trim() + "')";
			}
			else
			{
				InsertSqlString += "default.jpg')";
			}
			
			OleDbCommand InsertCmd = new OleDbCommand(InsertSqlString, conn);

			string SelectSqlString = "Select * From Product where ProductID='" + txtProductID.Text.Trim() + "' AND Manufacturer='" + Request.QueryString["Manufacturer"] + "'";
			OleDbCommand SelectCmd = new OleDbCommand(SelectSqlString, conn);
			
				
			conn.Open();

			try
			{
				if(SelectCmd.ExecuteScalar() == null)
				{
					InsertCmd.ExecuteNonQuery();
					ClearTextBox();
					this.btnAdd.Visible = false;
					this.Button1.Visible = true;
				}
				else
				{
					ClearTextBox();
					MessageBox("产品已存在！");
				}

			}
			catch(Exception err)
			{
				Response.Write(err.Message);
			}
			finally
			{
				conn.Close();
			}
		}
		
		public void ClearTextBox()
		{
			txtProductID.Text = "";
			txtUnitCost.Text = "";
			txtIntroduce.Text = "";
		}

		public   void   MessageBox(string   strMessage)   
		{   
			Response.Write("<"+"SCRIPT   language=javascript>");   
			Response.Write("alert(\""+strMessage+"\");");   
			Response.Write("<"+"/SCRIPT>\n");   
		}

	}
}