本篇内容主要讲解“VB.NET加密文件的实现方法”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“VB.NET加密文件的实现方法”吧!
VB.NET编程环境可以帮助开发人员打造一个性能稳定，安全可靠的编程平台，帮助开发人员大大提高编程效率。本文介绍使用XOR加密算法对数据进行加密， 这是一种很简单的算法，使用了尽量简单的VB编程方法，通俗易懂。我们可以采用更安全的算法如DES算法，IDEA算法等。
在窗体中添加一RichTextBox，设置其Name属性为SourceFile，Multiline属性为True，ScrollBars属性为3－both。添加一MainMenu，设置一菜单项“文件”，其下有“打开”，“保存”，“加密”，“解密”，“算子”等子菜单项。
以下是大致的VB.NET加密文件的程序界面：
Public Class Form1
Inherits System.Windows.Forms.Form
Dim strNum As String
Private Sub Form1_Load(ByVal eventSender
As System.Object, ByVal eventArgs
As System.EventArgs) Handles MyBase.Load
strNum = "password"
End Sub
Private Sub Form1_Resize(ByVal event
Sender As System.Object, ByVal eventArgs
As System.EventArgs) Handles MyBase.Resize
SourceFile.Width = Form1.DefInstance.Width
SourceFile.Height = Form1.DefInstance.Height
End Sub
解密过程，对xor算法而言，解密和VB.NET加密文件的过程是完全一样的
Private Function XorOut(ByRef
strNum As String, ByRef strText
As String) As String
Dim i As Integer
Dim XorValue1 As Short
Dim XorValue2 As Short
Dim strResult As String
For i = 1 To Len(strText)
XorValue1 = Asc(Mid(strText, i, 1))
XorValue2 = Asc(Mid(strNum,
(i Mod Len(strNum)) + 1, 1))
strResultstrResult = strResult &
Chr(XorValue1 Xor XorValue2)
Next
XorOut = strResult
End Function
Private Sub MenuDeEncrypt_Click
(ByVal sender As System.Object,
ByVal e As System.EventArgs)
Handles MenuDeEncrypt.Click
SourceFile.Text = XorOut(strNum,
(SourceFile.Text))
End Sub
Private Sub MenuEncrypt_Click
(ByVal sender As System.Object,
ByVal e As System.EventArgs)
Handles MenuEncrypt.Click
SourceFile.Text = XorOut(strNum,
(SourceFile.Text))
End Sub
Private Sub MenuOpen_Click(ByVal
sender As System.Object, ByVal e
As System.EventArgs) Handles
MenuOpen.Click
Dim openFile1 As New OpenFileDialog
' Determine whether the user
selected a file from the OpenFileDialog.
If (openFile1.ShowDialog() =
DialogResult.OK) _
And (openFile1.FileName.Length > 0) Then
' Load the contents of the
file into the RichTextBox.
SourceFile.LoadFile(openFile1.FileName, _
RichTextBoxStreamType.PlainText)
End If
End Sub
Private Sub MenuSave_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles MenuSave.Click
' Create a SaveFileDialog to request
a path and file name to save to.
Dim saveFile1 As New SaveFileDialog
' Initialize the SaveFileDialog to
specify the RTF extension for the file.
'saveFile1.DefaultExt = "*.rtf"
'saveFile1.Filter = "RTF Files|*.rtf"
' Determine if the user selected a
file name from the saveFileDialog.
If (saveFile1.ShowDialog() = DialogResult.OK) _
And (saveFile1.FileName.Length) > 0 Then
' Save the contents of the
RichTextBox into the file.
SourceFile.SaveFile(saveFile1.FileName, _
RichTextBoxStreamType.PlainText)
End If
End Sub
Private Sub MenuNum_Click(ByVal
sender As System.Object, ByVal e
As System.EventArgs) Handles MenuNum.Click
strNum = InputBox("请输入加密算子",
"设置加密算子")
End Sub
End Class
到此，相信大家对“VB.NET加密文件的实现方法”有了更深的了解，不妨来实际操作一番吧！这里是编程网网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！
