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 eventSender 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!这里是亿速云网站,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!
亿速云「云服务器」,即开即用、新一代英特尔至强铂金CPU、三副本存储NVMe SSD云盘,价格低至29元/月。点击查看>>
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。