VB.NET RichTextBox.SelectionFont属性代码示例

Private Sub ToggleBold()
   If richTextBox1.SelectionFont IsNot Nothing Then
      Dim currentFont As System.Drawing.Font = richTextBox1.SelectionFont
      Dim newFontStyle As System.Drawing.FontStyle

      If richTextBox1.SelectionFont.Bold = True Then
         newFontStyle = FontStyle.Regular
      Else
         newFontStyle = FontStyle.Bold
      End If

      richTextBox1.SelectionFont = New Font( _
         currentFont.FontFamily, _
         currentFont.Size, _
         newFontStyle _
      )
   End If
End sub

' 导入命名空间
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math

Public Class MainClass

   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 

End Class

Public Class Form1
    Private Sub frmDragRichText_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ' Give the RichTextBox some text.
        Dim txt As String = "www.java2s.com."
        rchSource.Text = txt

        rchSource.Select(txt.IndexOf("www"), Len("www"))
        rchSource.SelectionFont = New Font(rchSource.SelectionFont, FontStyle.Italic)

        rchSource.Select(txt.IndexOf("."), Len("."))
        rchSource.SelectionFont = New Font(rchSource.SelectionFont, FontStyle.Bold)
        rchSource.SelectionColor = Color.Brown

        rchSource.Select(txt.IndexOf("java2s"), Len("java2s"))
        rchSource.SelectionFont = New Font(rchSource.SelectionFont, FontStyle.Bold)
        rchSource.SelectionColor = Color.Red

        rchSource.Select(txt.IndexOf("com"), Len("com"))
        rchSource.SelectionFont = New Font(rchSource.SelectionFont, FontStyle.Underline)

        rchSource.Select(0, 0)
    End Sub

End Class


<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.rchSource = New System.Windows.Forms.RichTextBox
        Me.SuspendLayout()
        '
        'rchSource
        '
        Me.rchSource.AllowDrop = True
        Me.rchSource.Anchor = CType(((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.rchSource.Location = New System.Drawing.Point(0, 0)
        Me.rchSource.Name = "rchSource"
        Me.rchSource.Size = New System.Drawing.Size(296, 200)
        Me.rchSource.TabIndex = 10
        Me.rchSource.Text = ""
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(296, 200)
        Me.Controls.Add(Me.rchSource)
        Me.Name = "Form1"
        Me.Text = "CopyPasteRichText"
        Me.ResumeLayout(False)

    End Sub
    Friend WithEvents rchSource As System.Windows.Forms.RichTextBox

End Class