本文整理匯總了VB.NET中System.Security.Cryptography.SHA256Managed類的典型用法代碼示例。如果您正苦於以下問題：VB.NET SHA256Managed類的具體用法？VB.NET SHA256Managed怎麽用？VB.NET SHA256Managed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SHA256Managed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: Main
' 導入命名空間
Imports System.IO
Imports System.Security.Cryptography
Public Module HashDirectory
Public Sub Main(ByVal args() As String)
If args.Length < 1 Then
Console.WriteLine("No directory selected")
Return
End If
Dim targetDirectory As String = args(0)
If Directory.Exists(targetDirectory) Then
' Create a DirectoryInfo object representing the specified directory.
Dim dir As New DirectoryInfo(targetDirectory)
' Get the FileInfo objects for every file in the directory.
Dim files As FileInfo() = dir.GetFiles()
' Initialize a SHA256 hash object.
Using mySHA256 As SHA256 = SHA256.Create()
' Compute and print the hash values for each file in directory.
For Each fInfo As FileInfo In files
Try
' Create a fileStream for the file.
Dim fileStream = fInfo.Open(FileMode.Open)
' Be sure it's positioned to the beginning of the stream.
fileStream.Position = 0
' Compute the hash of the fileStream.
Dim hashValue() As Byte = mySHA256.ComputeHash(fileStream)
' Write the name of the file to the Console.
Console.Write(fInfo.Name + ": ")
' Write the hash value to the Console.
PrintByteArray(hashValue)
' Close the file.
fileStream.Close()
Catch e As IOException
Console.WriteLine($"I/O Exception: {e.Message}")
Catch e As UnauthorizedAccessException
Console.WriteLine($"Access Exception: {e.Message}")
End Try
Next
End Using
Else
Console.WriteLine("The directory specified could not be found.")
End If
End Sub
' Print the byte array in a readable format.
Public Sub PrintByteArray(array() As Byte)
For i As Integer = 0 To array.Length - 1
Console.Write($"{array(i):X2}")
If i Mod 4 = 3 Then
Console.Write(" ")
End If
Next
Console.WriteLine()
End Sub
End Module