form1.vb

来自「Visual.Basic.NET实用编程百例-47.6M.zip」· VB 代码 · 共 152 行

Imports System.Windows.Forms.RichTextBoxFinds
Public Class Form1
    Inherits System.Windows.Forms.Form
    Private i As Integer

#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 Label1 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents OpenFileDialog1 As System.Windows.Forms.OpenFileDialog
    Friend WithEvents RichTextBox1 As System.Windows.Forms.RichTextBox
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Button1 As System.Windows.Forms.Button

    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.Label1 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog
        Me.Button1 = New System.Windows.Forms.Button
        Me.RichTextBox1 = New System.Windows.Forms.RichTextBox
        Me.SuspendLayout()
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(144, 232)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(80, 24)
        Me.Button2.TabIndex = 0
        Me.Button2.Text = "查找"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(248, 232)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(88, 24)
        Me.Button3.TabIndex = 1
        Me.Button3.Text = "查找下一个"
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(8, 8)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(112, 16)
        Me.Label1.TabIndex = 2
        Me.Label1.Text = "输入要查找的字符"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(120, 0)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(96, 21)
        Me.TextBox1.TabIndex = 3
        Me.TextBox1.Text = ""
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(48, 232)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 5
        Me.Button1.Text = "打开文件"
        '
        'RichTextBox1
        '
        Me.RichTextBox1.AutoWordSelection = True
        Me.RichTextBox1.HideSelection = False
        Me.RichTextBox1.Location = New System.Drawing.Point(8, 32)
        Me.RichTextBox1.Name = "RichTextBox1"
        Me.RichTextBox1.Size = New System.Drawing.Size(360, 192)
        Me.RichTextBox1.TabIndex = 0
        Me.RichTextBox1.Text = ""
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(384, 273)
        Me.Controls.Add(Me.RichTextBox1)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Name = "Form1"
        Me.Text = "实现查找功能"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        i = 0
        i = RichTextBox1.Find(Me.TextBox1.Text)
        If i >= 0 Then
            Me.RichTextBox1.Select(i, Me.TextBox1.Text.Length)
            i = i + TextBox1.Text.Length
        End If
        Me.Button2.Enabled = True
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        Dim j As Integer
        j = RichTextBox1.Find(TextBox1.Text, i, -1, None)
        If j >= 0 Then
            Me.RichTextBox1.Select(j, Me.TextBox1.Text.Length)
            j = j + TextBox1.Text.Length
            i = j
        End If
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        OpenFileDialog1.Filter = "RTF格式文件(*.rtf)|*.rtf"
        If OpenFileDialog1.ShowDialog() = DialogResult.OK And _
        OpenFileDialog1.FileName <> "" Then
            RichTextBox1.LoadFile(OpenFileDialog1.FileName)
        End If
    End Sub
End Class