form1.vb

Visual.Basic.NET实用编程百例-47.6M.zip

Public Class Form1
    Inherits System.Windows.Forms.Form
    Dim strcodekey As String
    Dim strencryptnum As String

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写 dispose 以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents RichTextBox1 As System.Windows.Forms.RichTextBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.RichTextBox1 = New System.Windows.Forms.RichTextBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.SuspendLayout()
        '
        'RichTextBox1
        '
        Me.RichTextBox1.Location = New System.Drawing.Point(0, 40)
        Me.RichTextBox1.Name = "RichTextBox1"
        Me.RichTextBox1.Size = New System.Drawing.Size(288, 232)
        Me.RichTextBox1.TabIndex = 0
        Me.RichTextBox1.Text = ""
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(8, 8)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(32, 23)
        Me.Label1.TabIndex = 1
        Me.Label1.Text = "密码"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(48, 8)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.TabIndex = 2
        Me.TextBox1.Text = ""
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(160, 8)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(48, 23)
        Me.Button1.TabIndex = 3
        Me.Button1.Text = "加密"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(224, 8)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(48, 23)
        Me.Button2.TabIndex = 4
        Me.Button2.Text = "解密"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(292, 273)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.RichTextBox1)
        Me.Name = "Form1"
        Me.Text = "给文件加解密"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Function Cipher(ByVal strcodekey As String, ByVal strdata As String)
        Dim i As Integer
        Dim xorvalue1 As Short
        Dim xorvalue2 As Short
        Dim dataout As String
        For i = 1 To Len(strdata)
            xorvalue1 = Asc(Mid(strdata, i, 1))
            xorvalue2 = Asc(Mid(strcodekey, (i Mod Len(strcodekey)) + 1, 1))
            dataout = dataout & Chr(xorvalue1 Xor xorvalue2)
        Next
        Cipher = dataout
    End Function

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        '加密
        If TextBox1.Text = "" Then
            MsgBox("请输入加密密码！", MsgBoxStyle.OKOnly, "警告")
            TextBox1.Focus()
        Else
            If RichTextBox1.Text = "" Then
                MsgBox("请输入要加密的文本", MsgBoxStyle.OKOnly, "警告")
                RichTextBox1.Focus()
            Else
                Dim strencrypttext As String
                strcodekey = TextBox1.Text.ToString
                RichTextBox1.Text = Cipher(strcodekey, (RichTextBox1.Text))
                Button1.Enabled = False
                Button2.Enabled = True
            End If
        End If
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Button2.Enabled = False
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        '解密
        Dim strencrypttext As String
        strcodekey = TextBox1.Text.ToString
        RichTextBox1.Text = Cipher(strcodekey, (RichTextBox1.Text))
        Button2.Enabled = False
        Button1.Enabled = True
    End Sub
End Class