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01.15.2008 at 05:19PM PST, ID: 23085919
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Adding Text to Rich Text Box

Tags: Microsoft, VB.NET, 2005
How do you change the font for the Rich Text Box?

Can you do an example where the code adds 3 lines of text, one regular, on bold, and one italic to a rich text box?

Thank you,

Crazy_Penguin
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Question Stats
Zone: Programming
Question Asked By: Crazy_Penguins
Solution Provided By: FernandoSoto
Participating Experts: 3
Solution Grade: A
Views: 268
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01.15.2008 at 05:24PM PST, ID: 20668530

Rank: Wizard

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01.15.2008 at 05:40PM PST, ID: 20668594

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01.15.2008 at 08:59PM PST, ID: 20669335

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01.15.2008 at 09:04PM PST, ID: 20669352

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01.15.2008 at 09:10PM PST, ID: 20669368

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01.15.2008 at 09:21PM PST, ID: 20669404

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01.15.2008 at 05:24PM PST, ID: 20668530

Rank: Wizard

you have to select some text portion, and change the font of the selection. Some tutorial:
http://www.startvbdotnet.com/controls/rtb.aspx
 
01.15.2008 at 05:40PM PST, ID: 20668594

Rank: Wizard

to select a line you can do something like this:

Public Sub SelectLine(line as Integer)
    Dim start as Integer = richtextbox1.GetFirstCharIndexFromLine(line)
    Dim end as Integer = richtextbox1..GetFirstCharIndexFromLine(line+1)

    If start<=0 Then
        start = 0
        end = 0
    End If
    If end<= 0 Then
        end = richtextbox1.Text.Length
    End If
    richtextbox1.Select(start, end-start)        
End Sub
 
01.15.2008 at 08:59PM PST, ID: 20669335

Rank: Genius

Hi Crazy_Penguins;

This is not all that easy to do programmatically because you have to get the formatting correct. Microsoft has a web page that defines all the formating that needs to be done.

Rich Text Format (RTF) Specification, version 1.6
http://msdn2.microsoft.com/en-us/library/aa140277.aspx

Note that when you insert text with RTF formatting into a RichTextBox you do so through the RTF property as shown in the sample code. First line is regular text then bold text, then Italics and the last line is regular text in the color blue.

BTW I am no expert in this area.

As a side note here is a link to a project that adds rich formatting controls to a RichTextBox.

Fernando
1:
2:
        Dim rtfString As String = "{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset0 Microsoft Sans Serif;}}{\colortbl ;\red0\green0\blue255;}\viewkind4\uc1\pard\f0\fs17 Can you do an example where the code adds 3 lines of text, one regular, on bold, and one italic to a rich text box?\par\par\b Can you do an example where the code adds 3 lines of text, one regular, on bold, and one italic to a rich text box?\par\b0\par\i Can you do an example where the code adds 3 lines of text, one regular, on bold, and one italic to a rich text box?\par\par\pard\cf1\i0 Can you do an example where the code adds 3 lines of text, one regular, on bold, and one italic to a rich text box?\cf0\fs17\par}"
        RichTextBox1.Rtf = rtfString
Open in New Window
Accepted Solution
 
01.15.2008 at 09:04PM PST, ID: 20669352

Rank: Genius

Sorry, here is the link I talked about in my last post

A RichTextBox with a richtext toolbar. By Richard Parsons
http://www.codeproject.com/KB/miscctrl/richtextboxextended.aspx

Fernando
 
01.15.2008 at 09:10PM PST, ID: 20669368

Rank: Master

Can you do an example where the code adds 3 lines of text, one regular, on bold, and one italic to a rich text box?

' Select first line and the following code
Dim ft as Font=New Font(FontFamily,req_size,FontStyle.Regular)
richtextBox1.SelectionFont=ft                                                  

change FontStyle .Regular to FontStyle.Bold and FontStyle.Italic as follow for bold

Dim ft as Font=New Font(FontFamily,req_size,FontStyle.Bold)
richtextBox1.SelectionFont=ft
 
01.15.2008 at 09:21PM PST, ID: 20669404

Rank: Wizard

to set the text unformatted:
     richtextbox1.Text = "Line one" & chr(13) & "Second line" & chr(13) & "The last line"

then call my previous procedure:
    SelectLine(0)
and format the line
    richtextbox1.SelectionFont=New Font("Arial", 12, FontStyle.Regular)

similar with other lines:
    SelectLine(1)
    richtextbox1.SelectionFont=New Font("Arial", 12, FontStyle.Bold)

    SelectLine(2)
    richtextbox1.SelectionFont=New Font("Arial", 12, FontStyle.Italic)
 
 
01.16.2008 at 01:20PM PST, ID: 20676276
The accepted answer was what I was looking for, a way of doing it without selecting text, as my app will be adding a continues log information, I did not want to have to select text, just add.
 
 
01.16.2008 at 02:13PM PST, ID: 20676745
Even better documentation and dynamic adding of text....
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
        Dim rtfString As String = "{\rtf1\ansi\ansicpg1252\deff0\deflang1033_{\fonttbl{\f0\fnil\fcharset0 Microsoft Sans Serif;}}{\colortbl ;\red0\green0\blue255;}\viewkind4\uc1\pard\f0\fs17 Line 1\par\par\b Line 2\par\b0\par\i Line 3\par\par\pard\cf1\i0 Line 4\cf0\fs17\par}"
        '\fs20      Sets font size to 20 units
        '\par       new paragraph (line)
        '\b         Bold Text
        '\i         italic text
        rtfString = "{\rtf\ansi\deff0{\fonttb1{\f0\froman Microsoft Sans Serif;}}\fs20 This is plain text. \par{\b Some more text.}\par}"
        RichTextBox1.Rtf = rtfString
 
        'make new string of the RTF codes already in the box, then remove the last '}', then add text and re-add the '}'
        Dim val2 As String = RichTextBox1.Rtf.Remove(RichTextBox1.Rtf.LastIndexOf("}".ToString), 1) & "more and {\i more}}"
        RichTextBox1.Rtf = val2
        'TextBox1.Text = val2   'drop RTF codes in normal text box for debug
Open in New Window
 
 
01.16.2008 at 03:30PM PST, ID: 20677362
One more note, on line 1 of the code above, specifying the String is not needed - it is overwritten line 6 anyhow.
 
 
01.16.2008 at 04:31PM PST, ID: 20677723
Not a problem, glad I was able to help. ;=)
 
 
 
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