如何测试目录是否隐藏在C＃中？

Question

I have this loop:

  foreach (DirectoryInfo dir in downloadedMessageInfo.GetDirectories())
        {
            if (dir.Attributes != FileAttributes.Hidden)
            {
                dir.Delete(true);
            }
        }

How can I correctly skip all hidden directories?

Answer 1

Change your if statement to:

if ((dir.Attributes & FileAttributes.Hidden) != FileAttributes.Hidden)

You need to use the bitmask since Attributes is a flag enum. It can have multiple values, so hidden folders may be hidden AND another flag. The above syntax will check for this correctly.

Answer 2

在.NET 4.0中，您可以：

dir.Attributes.HasFlag(FileAttributes.Hidden)

Answer 3

Attributes是Flags值，因此您需要使用按位比较来检查它是否包含FileAttributes.Hidden ，如下所示：

if ((dir.Attributes & FileAttributes.Hidden) == 0)

Answer 4

This code works for me in VB.Net;

If (dir.Attributes.Tostring.Contains("Hidden") Then
    ' File is hidden
Else
    ' File is not hidden
EndIf