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;

namespace admin
{
	/// <summary>
	/// ProductList 的摘要說明。
	/// </summary>
	public class ProductList : General
	{
		protected System.Web.UI.WebControls.DataGrid GridProduct;
		protected System.Web.UI.WebControls.Button Submit;
		protected System.Web.UI.WebControls.Label Message;
		protected System.Web.UI.HtmlControls.HtmlForm Form1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			if (!Page.IsPostBack)
			{
				BindGrid();
				AdminDB.InsertAction("查看商品列表", System.DateTime.Now, User.Identity.Name);
			}
			
		}

		void BindGrid()
		{		
			AdminDB admin = new AdminDB();
			GridProduct.DataSource = admin.GetAllProduct();
			GridProduct.DataBind();
		}

		void UpdateProductInfo()
		{
			AdminDB admin = new AdminDB();

			for (int i=0; i< GridProduct.Items.Count; i++)
			{
				int productId = Convert.ToInt32(GridProduct.DataKeys[i]);

				string productName = ((TextBox) GridProduct.Items[i].FindControl("ProductName")).Text.Trim();

				decimal price = decimal.Parse(((TextBox) GridProduct.Items[i].FindControl("Price")).Text.Trim());

				string intro = ((TextBox) GridProduct.Items[i].FindControl("Intro")).Text;

				CheckBox remove = (CheckBox) GridProduct.Items[i].FindControl("Remove");
				
				try
				{

					if (remove.Checked)
					{
						admin.DeleteProduct(productId);

						AdminDB.InsertAction("刪除商品"+ productName, System.DateTime.Now, User.Identity.Name);
					}

					else
					{
						admin.AlterProduct(productId, productName, price, intro);

						AdminDB.InsertAction("修改商品"+ productName + "的信息", System.DateTime.Now, User.Identity.Name);
					}
				}
				catch
				{
					Message.Text = "輸入有誤！";
				}
			}
		}

		#region Web 窗體設(shè)計(jì)器生成的代碼
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 該調(diào)用是 ASP.NET Web 窗體設(shè)計(jì)器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 設(shè)計(jì)器支持所需的方法 - 不要使用代碼編輯器修改
		/// 此方法的內(nèi)容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.GridProduct.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.GridProduct_PageIndexChanged);
			this.Submit.Click += new System.EventHandler(this.Submit_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Submit_Click(object sender, System.EventArgs e)
		{
			UpdateProductInfo();
			BindGrid();
		}

		private void GridProduct_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
		{
			GridProduct.CurrentPageIndex = e.NewPageIndex;
			BindGrid();
		}
	}
}