admin_upfiles.aspx.cs

非常完整的新闻发布系统

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.IO;

namespace WebNews.admin
{
	/// <summary>
	/// rm1 的摘要说明。
	/// </summary>
	public class rm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label myLabel;
		protected System.Web.UI.WebControls.DataGrid MyDataGrid;
		protected System.Web.UI.WebControls.LinkButton btnFirst;
		protected System.Web.UI.WebControls.LinkButton LinkButton2;
		protected System.Web.UI.WebControls.LinkButton LinkButton1;
		protected System.Web.UI.WebControls.LinkButton LinkButton3;
		protected System.Web.UI.WebControls.Label lblCurrentIndex;
		protected System.Web.UI.WebControls.Label lblPageCount;
	
		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(!Page.IsPostBack)
			{
				string userclass=(string)Session["userclass"];
				if(userclass.Trim()=="系统管理员")
				{
					getFile();
				}
				else 
				{
					myLabel.Text="你无权管理文件";
				}
			}
		}

		private void getFile()			   //得到文件
		{
			Directory.SetCurrentDirectory(Server.MapPath("../upfiles/"));
			string fd=Directory.GetCurrentDirectory();
			string[] fileEntries=Directory.GetFiles(fd);
			DataTable dt = new DataTable();
			DataRow dr; 
			dt.Columns.Add(new DataColumn("filename", typeof(string)));
			dt.Columns.Add(new DataColumn("time", typeof(DateTime)));
		    dt.Columns.Add(new DataColumn("lasttime", typeof(DateTime)));			
			foreach(string filename in fileEntries)
			{	
				string d=Server.MapPath("../upfiles/");
				int i=d.Length ;
				dr = dt.NewRow();	
				dr[0]=filename.Remove(0,i);
				dr[1]=File.GetCreationTime(filename);
				dr[2]=File.GetLastAccessTime(filename);
				dt.Rows.Add(dr);
			}  
			DataView dv = new DataView(dt);
			MyDataGrid.DataSource=dv;
			MyDataGrid.DataBind();
			lblCurrentIndex.Text="第"+((Int32)MyDataGrid.CurrentPageIndex+1)+"页";
			lblPageCount.Text="/共"+MyDataGrid.PageCount+"页";
		}

		public	void PagerButtonClick(Object sender, EventArgs e)		   //分页功能
		{
			//获得LinkButton的参数值
			string arg = ((LinkButton)sender).CommandArgument;
			switch(arg)
			{
				case ("next"):
					if (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1))
						MyDataGrid.CurrentPageIndex ++;
					break;
				case ("prev"):
					if (MyDataGrid.CurrentPageIndex > 0)
						MyDataGrid.CurrentPageIndex --;
					break;
				case ("last"):
					MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1);
					break;
				case("first"):
					MyDataGrid.CurrentPageIndex =0;
					break;
			}
			getFile();
		}

		#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.MyDataGrid.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.MyDataGrid_DeleteCommand);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		public void MyDataGrid_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{	 
			string userclass=(string)Session["userclass"];
			if(userclass.Trim()=="系统管理员")
			{
				string path=Server.MapPath("../upfiles/")+(string)MyDataGrid.DataKeys[e.Item.ItemIndex];;
				if(File.Exists(path))
				{
					File.Delete(path)	;
					myLabel.Text="删除文件成功";
					if(MyDataGrid.CurrentPageIndex>0)
					{
						MyDataGrid.CurrentPageIndex= MyDataGrid.CurrentPageIndex-1;
					}
					getFile();
				}
			}			
		}


	}
}