使用Treeview模拟操作系统的文件系统
<%@?Page?language="c#"?Codebehind="default.aspx.cs"?AutoEventWireup="false"?Inherits="OsFilesytem._default"?%>
<%@?Register?TagPrefix="iewc"?Namespace="Microsoft.Web.UI.WebControls"?Assembly="Microsoft.Web.UI.WebControls"?%>
<!DOCTYPE?HTML?PUBLIC?"-//W3C//DTD?HTML?4.0?Transitional//EN"?>
<HTML>
<HEAD>
<title>WebForm2</title>
<meta?name="GENERATOR"?Content="Microsoft?Visual?Studio?.NET?7.1">
<meta?name="CODE_LANGUAGE"?Content="C#">
<meta?name="vs_defaultClientScript"?content="JavaScript">
<meta?name="vs_targetSchema"?content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form?id="Form1"?method="post"?runat="server">
<iewc:TreeView?id="TreeView1"?runat="server"?AutoPostBack="True"?BackColor="#EEEEEE"></iewc:TreeView>
</form>
</body>
</HTML>
default.aspx.cs代碼：
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?Microsoft.Web.UI.WebControls;
using?System.IO;
namespace?OsFilesytem
{
///?<summary>
///?WebForm2?的摘要說明。
///?</summary>
public?class?_default?:?System.Web.UI.Page
{
protected?Microsoft.Web.UI.WebControls.TreeView?TreeView1;
private?void?Page_Load(object?sender,?System.EventArgs?e)
{
if(!Page.IsPostBack)
{
TreeNode?newnode=new?TreeNode();
newnode.Text="我的電腦";
this.TreeView1.Nodes.Add(newnode);
try?
{
string[]?drives?=?System.IO.Directory.GetLogicalDrives();
foreach?(string?str?in?drives)
{
TreeNode?tmpNd;
tmpNd=new?TreeNode();
tmpNd.Text=str;
this.TreeView1.Nodes[0].Nodes.Add(tmpNd);
//ProcessDirectory(str,tmpNd);
}
}
catch?(System.IO.IOException)
{
this.Response.Write("I/O錯誤！");
}
catch?(System.Security.SecurityException)
{
this.Response.Write("沒有訪問權限！");
}
}
}
public?void?ProcessDirectory(string?targetDirectory,TreeNode?TN)
{
if(targetDirectory.ToString()==@"A:\")
{
return;
}
TreeNode?tmpNd;
try
{
//?Process?the?list?of?files?found?in?the?directory
string?[]?fileEntries?=?Directory.GetFiles(targetDirectory);
foreach(string?fileName?in?fileEntries)
{
tmpNd=new?TreeNode();
//只顯示文件名
tmpNd.Text=fileName.Substring(fileName.LastIndexOf(@"\")+1);
//顯示文件?全名（路徑+名稱）
//tmpNd.Text=fileName;
TN.Nodes.Add(tmpNd);
}
//?Recurse?into?subdirectories?of?this?directory??
string?[]?subdirectoryEntries?=?Directory.GetDirectories(targetDirectory);
foreach(string?subdirectory?in?subdirectoryEntries)
{
tmpNd=new?TreeNode();
//只顯示文件夾名
tmpNd.Text=subdirectory.Substring(subdirectory.LastIndexOf(@"\")+1);
//顯示文件夾?全名（路徑+名稱）
//tmpNd.Text=subdirectory;
TN.Nodes.Add(tmpNd);
//ProcessDirectory(subdirectory,tmpNd);
}
}
catch
{
}
}
///?<summary>
///?獲得當前結點的全名
///?</summary>
///?<param?name="TN">當前結點</param>
///?<returns>全名</returns>
private?string?GetFullName(TreeNode?TN)
{
if(TN.Text=="我的電腦")
{
return?"我的電腦";
}
string?str_fullname="";
while(((TreeNode)TN.Parent).Text!="我的電腦")
{
str_fullname?=?TN.Text?+?@"\"?+?str_fullname;
TN=(TreeNode)TN.Parent;
}
str_fullname?=TN.Text?+?str_fullname;
return?str_fullname;
}
#region?Web?窗體設計器生成的代碼
override?protected?void?OnInit(EventArgs?e)
{
//
//?CODEGEN:?該調用是?ASP.NET?Web?窗體設計器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
///?<summary>
///?設計器支持所需的方法?-?不要使用代碼編輯器修改
///?此方法的內容。
///?</summary>
private?void?InitializeComponent()
{????
this.TreeView1.Expand?+=?new?Microsoft.Web.UI.WebControls.ClickEventHandler(this.TreeView1_Expand);
this.Load?+=?new?System.EventHandler(this.Page_Load);
}
#endregion
private?void?TreeView1_Expand(object?sender,?Microsoft.Web.UI.WebControls.TreeViewClickEventArgs?e)
{
TreeNode?TNS=this.TreeView1.GetNodeFromIndex(e.Node);
foreach(TreeNode?TN?in?TNS.Nodes)
{
this.ProcessDirectory(this.GetFullName(TN),TN);
}
}
}
}?
OVER
轉載于:https://www.cnblogs.com/RobotTech/archive/2006/10/11/526254.html
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