form1.vb

Source code for VB.NET book - Chapter 2

Public Class Form1
    Inherits System.Windows.Forms.Form

#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 Button1 As System.Windows.Forms.Button
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.RichTextBox1 = New System.Windows.Forms.RichTextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.SuspendLayout()
        '
        'RichTextBox1
        '
        Me.RichTextBox1.Dock = System.Windows.Forms.DockStyle.Top
        Me.RichTextBox1.Location = New System.Drawing.Point(0, 0)
        Me.RichTextBox1.Name = "RichTextBox1"
        Me.RichTextBox1.Size = New System.Drawing.Size(292, 160)
        Me.RichTextBox1.TabIndex = 0
        Me.RichTextBox1.Text = ""
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(152, 168)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(80, 32)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "查  找"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(48, 176)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(80, 20)
        Me.TextBox1.TabIndex = 2
        Me.TextBox1.Text = ""
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 230)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.RichTextBox1)
        Me.Name = "Form1"
        Me.Text = "查找"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim str1 As String
        str1 = TextBox1.Text
        If str1 <> "" Then
            RichTextBox1.Text = strRightpart(RichTextBox1.Text, str1)
        Else
            MsgBox("没有找到该字符串")
        End If
    End Sub
    Public Function strRightpart(ByVal strInput As String, ByVal strInputPart As String) As String
        Dim temp As String
        Dim strInput1, strInputPart1, i, Count, chrPlace As Integer
        strInput1 = Len(strInput)
        strInputPart1 = Len(strInputPart)
        For i = strInput1 To 1 Step -1
            temp = Microsoft.VisualBasic.Left(strInput, i)
            If Microsoft.VisualBasic.Right(temp, strInputPart1) = strInputPart Then Exit For
            Count = Count + 1
        Next
        chrPlace = strInput1 - Count + 1
        strRightpart = Mid$(strInput, chrPlace)
    End Function
End Class