administrators.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>
	/// Admin 的摘要说明。
	/// </summary>
	public class Administrators : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DropDownList DropDownList1;
		protected System.Web.UI.WebControls.Label Label5;
		protected System.Web.UI.WebControls.Button Button2;
		protected System.Web.UI.WebControls.DataGrid DataGrid1;
		protected System.Web.UI.HtmlControls.HtmlGenericControl FONT1;
		protected System.Web.UI.WebControls.HyperLink hplAddProduct;
		protected System.Web.UI.WebControls.HyperLink hplAddAdmin;
		protected System.Web.UI.WebControls.HyperLink HyperLink1;

		protected int lastEditedPage;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			
		}

		private void DataGridDataBind()
		{
			string ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=";
			ConnectionString += Server.MapPath("MobileShop.mdb");
			OleDbConnection conn = new OleDbConnection(ConnectionString);
			
			string SqlString = "Select ID,Manufacturer,ProductID,UnitCost From Product where Manufacturer='" + this.DropDownList1.SelectedItem.Value + "' Order by ProductID Asc";

			OleDbDataAdapter da = new OleDbDataAdapter(SqlString, conn);
			
			DataSet ds = new DataSet();
			try
			{
				da.Fill(ds);

				DataGrid1.DataSource = ds.Tables[0].DefaultView;
				DataGrid1.DataBind();
			}
			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.DataGrid1.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_DeleteCommand);
			this.DataGrid1.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemDataBound);
			this.Button2.Click += new System.EventHandler(this.Button2_Click);
			//if(Convert.ToBoolean(Request.QueryString["IsAdmin"]))
			//{
			if(Session["AdminID"] != null)
			{
				this.Load += new System.EventHandler(this.Page_Load);
			}
			//}
			else
			{
				Response.Redirect("Default.aspx");
			}

		}
		#endregion
		private void Button2_Click(object sender, System.EventArgs e)
		{
			DataGridDataBind();
			this.hplAddProduct.Visible = true;
			this.hplAddProduct.NavigateUrl = "AddProduct.aspx?Manufacturer=" + this.DropDownList1.SelectedItem.Value;
		}

		private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
		{
			if (e.Item.ItemIndex != -1)
			{
				e.Item.Cells[0].Text = Convert.ToString(e.Item.ItemIndex + 1);

				e.Item.Cells[2].Text = "<a href='" + "EditProduct.aspx?ID=" + e.Item.Cells[1].Text.Trim() + "'>" + e.Item.Cells[2].Text + "</a>"; 
			}
		}

		private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			int empID = (int)DataGrid1.DataKeys[e.Item.ItemIndex];
			string DeleteSqlString = "delete from Product where ID =" + empID.ToString();
			string ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=";
			ConnectionString += Server.MapPath("MobileShop.mdb");
			OleDbConnection conn = new OleDbConnection(ConnectionString);
			OleDbCommand DelectCmd = new OleDbCommand( DeleteSqlString, conn);
			conn.Open();
			try
			{
				DelectCmd.ExecuteNonQuery();
				lastEditedPage = DataGrid1.CurrentPageIndex;
				if(((DataGrid1.PageCount-DataGrid1.CurrentPageIndex)==1)&&(DataGrid1.Items.Count==1))
				{
					if(this.DataGrid1.PageCount>1)
					{
						lastEditedPage = lastEditedPage-1;
					}
					else
					{
						lastEditedPage = 0;
					}
				}
				this.DataGrid1.CurrentPageIndex = lastEditedPage;
				this.DataGridDataBind();
				Response.Redirect("Administrators.aspx");
			}
			catch(Exception err)
			{
				Response.Write(err.ToString());
			}
			finally
			{
				conn.Close();
			}
		}
	}
}