具有行号的Windows窗体文本框?
时间:2020-03-06 14:38:17 来源:igfitidea点击:
我正在为我正在编写的应用程序寻找免费的winforms组件。我基本上需要一个在侧栏中包含行号的文本框。能够将其中的数据制成表格也是一大优点。
有人知道可以做到这一点的预制组件吗?
解决方案
看一下SharpDevelop Ccompiler / IDE源代码。他们有一个复杂的带有行号的文本框。我们可以查看源代码,弄清楚他们在做什么,然后自己实现。
这是我所引用的示例:
替代文字http://community.sharpdevelop.net/photos/mattward/images/original/FeatureTourQuickClassBrowser.aspx
在http://www.xtremedotnettalk.com/showthread.php?s=&threadid=49661&highlight=RichTextBox上有一个包含代码的项目。
我们可以使用以下用户/密码登录该站点以下载zip文件:bugmenot / bugmenot
参考Wayne的文章,这里是相关代码。它使用GDI在文本框旁边绘制行号。
Public Sub New() MyBase.New() 'This call is required by the Windows Form Designer. InitializeComponent() 'Add any initialization after the InitializeComponent() call SetStyle(ControlStyles.UserPaint, True) SetStyle(ControlStyles.AllPaintingInWmPaint, True) SetStyle(ControlStyles.DoubleBuffer, True) SetStyle(ControlStyles.ResizeRedraw, True) End Sub Private Sub RichTextBox1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles RichTextBox1.SelectionChanged FindLine() Invalidate() End Sub Private Sub FindLine() Dim intChar As Integer intChar = RichTextBox1.GetCharIndexFromPosition(New Point(0, 0)) intLine = RichTextBox1.GetLineFromCharIndex(intChar) End Sub Private Sub DrawLines(ByVal g As Graphics, ByVal intLine As Integer) Dim intCounter As Integer, intY As Integer g.Clear(Color.Black) intCounter = intLine + 1 intY = 2 Do g.DrawString(intCounter.ToString(), Font, Brushes.White, 3, intY) intCounter += 1 intY += Font.Height + 1 If intY > ClientRectangle.Height - 15 Then Exit Do Loop End Sub Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs) DrawLines(e.Graphics, intLine) End Sub Private Sub RichTextBox1_VScroll(ByVal sender As Object, ByVal e As System.EventArgs) Handles RichTextBox1.VScroll FindLine() Invalidate() End Sub Private Sub RichTextBox1_UserScroll() Handles RichTextBox1.UserScroll FindLine() Invalidate() End Sub
RichTextBox被这样重写:
Public Class UserControl1 Inherits System.Windows.Forms.RichTextBox Public Event UserScroll() Protected Overrides Sub WndProc(ByRef m As System.Windows.Forms.Message) If m.Msg = &H115 Then RaiseEvent UserScroll() End If MyBase.WndProc(m) End Sub End Class
(在xtremedotnettalk.com论坛上由divil编写的代码。)
.NET的CodePlex中有一个源代码编辑组件,
http://www.codeplex.com/ScintillaNET