本文整理匯總了VB.NET中System.UnauthorizedAccessException類的典型用法代碼示例。如果您正苦於以下問題：VB.NET UnauthorizedAccessException類的具體用法？VB.NET UnauthorizedAccessException怎麽用？VB.NET UnauthorizedAccessException使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
在下文中一共展示了UnauthorizedAccessException類的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: Example
' 導入命名空間
Imports System.IO
Module Example
Public Sub Main()
Dim filePath As String = ".\ROFile.txt"
If Not File.Exists(filePath) Then File.Create(filePath)
' Keep existing attributes, and set ReadOnly attribute.
File.SetAttributes(filePath,
(New FileInfo(filePath)).Attributes Or FileAttributes.ReadOnly)
Dim sw As StreamWriter = Nothing
Try
sw = New StreamWriter(filePath)
sw.Write("Test")
Catch e As UnauthorizedAccessException
Dim attr As FileAttributes = (New FileInfo(filePath)).Attributes
Console.Write("UnAuthorizedAccessException: Unable to access file. ")
If (attr And FileAttributes.ReadOnly) > 0 Then
Console.Write("The file is read-only.")
End If
Finally
If sw IsNot Nothing Then sw.Close()
End Try
End Sub
End Module輸出：
UnAuthorizedAccessException: Unable to access file. The file is read-only.