Replace text in RichTextBox eith keep formatting

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C#

WPF

RichTextBox

Hi Group

how can i replace text in WPF RichTextBox with keep replaced text formatting??

Posted 30-Jul-14 4:21am

Antranig Marachlian

Updated 28-Jun-16 21:24pm

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BillWoodruff 30-Jun-16 0:39am

It's important you make an attempt to code this yourself, and show your code here; include any error messages.

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gratedevenderpal sharma · Answer 1 · 2016-06-28T21:24:00

Solution 1

C#

RTB.SelectAll();

           string[] textArray = RTB.SelectedText.Split(new char[] { '\n' });

           foreach (string strText in textArray)
           {
               if (!string.IsNullOrEmpty(strText))
                   RTB.Rtf = RTB.Rtf.Replace(strText, strText.ToUpper());
           }

Posted 28-Jun-16 21:24pm

gratedevenderpal sharma

Comments

BillWoodruff 29-Jun-16 14:23pm

+4 I think you are on your way to an excellent answer here. I'd like to see you earn a #5 :) by handling the case where you replace ONLY within the selection. As it is now, you'd replace every occurrence of the matched-string in ALL the Rtf.

Also, let me ask you to think about why you chose to split the Selection in the first place. What if the user wanted to replace content that included line-breaks ?

fyi: you can use an "empty" char[] and the 'RemoveEmptyEntries option, and the resulting string[] will be only the Rtf content lines.

cheers, Bill

private char[] splitChars = new char[] {};

var splitstr = someString.Split(splitChars, StringSplitOptions.RemoveEmptyEntries);