本文整理匯總了VB.NET中System.Security.Permissions.FileIOPermission類的典型用法代碼示例。如果您正苦於以下問題：VB.NET FileIOPermission類的具體用法？VB.NET FileIOPermission怎麽用？VB.NET FileIOPermission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FileIOPermission類的3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: FileIOPermission
Dim f As New FileIOPermission(PermissionState.None)
f.AllLocalFiles = FileIOPermissionAccess.Read
Try
f.Demand()
Catch s As SecurityException
Console.WriteLine(s.Message)
End Try示例2: FileIOPermission
Dim f2 As New FileIOPermission(FileIOPermissionAccess.Read, "C:\test_r")
f2.AddPathList(FileIOPermissionAccess.Write Or FileIOPermissionAccess.Read, "C:\example\out.txt")
Try
f2.Demand()
Catch s As SecurityException
Console.WriteLine(s.Message)
End Try示例3: New FileIOPermission
' 導入命名空間
Imports System.Security.Principal
Imports System.Security.Permissions
Imports System.IO
public class MainClass
Shared Sub Main()
Dim oFp As FileIOPermission = New FileIOPermission(FileIOPermissionAccess.Write, "d:\test.txt")
oFp.Assert()
Try
Dim objWriter As New IO.StreamWriter(File.Open("d:\test.txt", IO.FileMode.Open))
objWriter.WriteLine("Hi there!")
objWriter.Flush()
objWriter.Close()
objWriter = Nothing
Catch objA As System.Exception
Console.WriteLine(objA.Message)
End Try
End Sub
End Class