changing the background color of the selected text in an RTB

[njuneardave]

Hey,

 

I want to change the background color of the selected text in an rtb (not the WHOLE rtb background... just the background of the selection). I can't find any methods to do so in the C# library. Any ideas?

 

 

Thanks so much!

[Malfunction]

doesn't this work?

RichTextBox1.SelectionBackColor = Color.Yellow

[njuneardave]

im using .net 2003, and it isn't included in the standard library for an RTB in 2003 D=

[DiverDan]

It's been a while since I dug into this so please bear with me. As I remember, you'll need to look into the RTF code and do some string manipulation to set the selected RTF backcolor. Here's the code that I adapted for setting and de-setting a highlight to the selected RTF.

 

   Private Sub Add_Highlight(rtf As RichTextBox)
       If rtf.SelectedText.Length <= 0 Then Exit Sub

       Try
           Dim strRTF As String = rtf.SelectedRtf
           Dim startpos As Integer = strRTF.IndexOf("\uc1") - 1
           Dim nextpos As Integer = strRTF.IndexOf("\pard\") + 6
           Dim strResult As String

           If strRTF.IndexOf("highlight1\") < 0 Then
               strResult = strRTF.Insert(nextpos, "highlight1\").Insert(startpos, HighlightBlackRtf(Color.Yellow))
               rtf.SelectedRtf = strResult
           Else 'if the text is already highlighted
               strResult = strRTF.Replace("{\colortbl;\red255\green255\blue0;}", "")
               strResult = strRTF.Replace("highlight1\", "")
               rtf.SelectedRtf = strResult
           End If

       Catch ex As Exception
           Console.WriteLine(ex.Message)
       End Try
   End Sub

   Private Function HighlightBlackRtf(ByVal c As Color) As String
       Dim strcol As String = "{\colortbl ;\red" & c.R & "\green" & c.G & "\blue" & c.B & ";}"
       Return strcol
   End Function

 

I hope this will help you.