发生UnauthorizedAccessException时如何跳过目录或文件

Question

代码如下。我试图从 sDirPath 的特定路径获取文件，然后存储在树视图中，基本上是制作一个自定义文件夹浏览器对话框。但问题是，当我得到无法访问的系统文件或文件夹时，我得到 UnauthorizedAccessException。它出现在文件夹或文件上，例如隐藏和系统文件夹或文件，例如 C:\ 中的 $recyle.bin 或文档和设置的快捷方式。我只想跳过这些文件夹或文件。我不想去取它们。

Dim sAllfiles() As String = Directory.GetFiles(sDirPath, "*.*")
For Each sfile As String In sAllfiles          
    Dim objFileInformation As FileInfo = New FileInfo(sfile)
    Dim tnTreeNodeSub As TreeNode
    tnTreeNodeSub=tnTreeNodeRootDirectory.Nodes.Add(objFileInformation.Name)
Next

Answer 1

Try .. Catch 语句正是针对此。

例如，这只会忽略 UnauthorizedAccessException。任何其他异常仍会终止循环。

Dim sAllfiles() As String = Directory.GetFiles(sDirPath, "*.*")
For Each sfile As String In sAllfiles
    Try
        Dim objFileInformation As FileInfo = New FileInfo(sfile)
        Dim tnTreeNodeSub As TreeNode
        tnTreeNodeSub=tnTreeNodeRootDirectory.Nodes.Add(objFileInformation.Name)
    Catch ex As UnauthorizedAccessException
        Continue For 'Ignore the exception and move on
    End Try
Next

Answer 2

Gabriel Luci 的回答修改：

Try
    Dim sAllfiles() As String = Directory.GetFiles(sDirPath, "*.*")
    For Each sfile As String In sAllfiles
        Try
            Dim objFileInformation As FileInfo = New FileInfo(sfile)
            Dim tnTreeNodeSub As TreeNode
            tnTreeNodeSub=tnTreeNodeRootDirectory.Nodes.Add(objFileInformation.Name)
        Catch ex As UnauthorizedAccessException
            Continue For 'Ignore the exception and move on
        End Try
    Next
Catch ex As UnauthorizedAccessException
    'Ignore the exception and move on
End Try

如果您直接在 sDirPath 中提供无法访问的路径，那么这样做并添加一个捕获将有所帮助，如果您不添加它将关闭您的应用程序。

发生UnauthorizedAccessException时如何跳过目录或文件

How to skip Directory or file when UnauthorizedAccessException occurs

.net

vb.net

exception

unauthorizedaccessexcepti