Control.MapPathSecure(String) 方法

定义

命名空间:

System.Web.UI

程序集:

System.Web.dll

检索虚拟路径映射到的物理路径（绝对路径或相对路径）。

protected public:
 System::String ^ MapPathSecure(System::String ^ virtualPath);

protected internal string MapPathSecure(string virtualPath);

member this.MapPathSecure : string -> string

Protected Friend Function MapPathSecure (virtualPath As String) As String

参数

virtualPath

String

相对或根相对 URL。

返回

String

所请求文件的物理路径。

例外

ArgumentNullException

virtualPath 是 null 或空字符串（“）。

示例

下面的示例使用 MapPathSecure 该方法获取包含 Page 或 UserControl 对象的虚拟目录的物理路径。

// An HttpException occurs if the server control does not,;
// have permissions to read the resulting mapped file. 
     output.Write("The Actual Path of the virtual directory : "+
     MapPathSecure(TemplateSourceDirectory)+"<br>");

    // Get all the files from the absolute path of 'MyControl';
    // using TemplateSourceDirectory which gives the virtual Directory.
        string [] myFiles=
        Directory.GetFiles(MapPathSecure(TemplateSourceDirectory));
        output.Write("The files in this Directory are <br>");

         // List all the files.
         for (int i=0;i<myFiles.Length;i++)
            output.Write(myFiles[i]+"<br>");

' An HttpException occurs if the server control does not,;
' have permissions to read the resulting mapped file.
output.Write("The Actual Path of the virtual directory : " & _
            MapPathSecure(TemplateSourceDirectory) & "<br>")

' Get all the files from the absolute path of 'MyControl';
' using TemplateSourceDirectory which gives the virtual Directory.
Dim myFiles As String() = Directory.GetFiles(MapPathSecure(TemplateSourceDirectory))
output.Write("The files in this Directory are <br>")

' List all the files.
Dim i As Integer
For i = 0 To myFiles.Length - 1
   output.Write(myFiles(i) & "<br>")
Next i

注解

此方法只能由有权读取文件以及属于完全受信任的 .dll 文件（如 System.Web.dll）的服务器控件使用。 这有助于防止安全漏洞。