C# Tutorial 26: Search and highlight text in Textbox or richTextBox in C#

How to highlight occurrences of a search term in text in Visual Studio Highlight Find Results C# Highlight all occurrences of selected word – Visual Studio C…
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20 responses to “C# Tutorial 26: Search and highlight text in Textbox or richTextBox in C#”

1. J. Bertilsson says:

   27/02/2015 at 5:22 pm

   I think It would be a smarter choice to use streamreader to open the file

   Reply
2. Robert Carlson says:

   27/02/2015 at 6:08 pm

   With this code it un-formats my RTF, say I have set font to a size and
   color, as soon as I do a search BOOM no more size and color. Do you have a
   fix for this?

   Reply
3. Alex Johnson says:

   27/02/2015 at 6:33 pm

   What is RichTextBoxFinds for a normal textbox? please help.

   Reply
4. Rasyid Safie says:

   27/02/2015 at 7:17 pm

   can you teach us how to search and open doc. file in VS??

   Reply
5. Lasaphon says:

   27/02/2015 at 8:00 pm

   How to count number of highlight?

   Reply
6. Ferii24 says:

   27/02/2015 at 8:40 pm

   This video saved my life! Thank you very much! :)

   Reply
7. Ricardo Garcia says:

   27/02/2015 at 9:18 pm

   Greetings;
   Once again nice tutorial.
   You forgot to prevent users from messing up teir heads (lol).
   As i was learning this i found myself with some issues.
   1) Scrolling my RichTextBox (to find the matching words – while a seach is
   active)
   the RTB is always showing the it’s first lines / the top of the file)

   I believe that to prevent this we have to know how to:
   – Go to the first matching word
   – Go to next found word (with a button for example)

   Maybe some extra coding is needed. I’m not sure yet; as “search” funtion is
   new for me.

   Can you show us how it could be done?
   Thanks in Advance

   Reply
8. k.ansudeen Imran says:

   27/02/2015 at 9:45 pm

   hi!!!!!!!!! can u upload a video about how to open command prompt using
   c#?also how to run commands through c#?

   Reply
9. PCGaming300 says:

   27/02/2015 at 10:31 pm

   The one problem with the highlighting is that it is case sensitive

   Reply
10. preethi vps says:

    27/02/2015 at 11:20 pm

    how can you reference a xml file which is uploaded in rich textbox.if it
    is in c drive then fine it it is in rich text box.. want to know for RTB.

    var doc =
    XDocument.Load(@”C:UsersIT-AdministratorDesktop2014-01-07_Middlesex.xml”);
    working ….fine……

    Reply
11. Ricardo G. says:

    28/02/2015 at 12:07 am

    It would be good to clarify what the integer is…
    Index = ???
    I believe it’s the cursor location inside the textBox. But not sure

    Reply
12. Bruno Camargo says:

    28/02/2015 at 1:03 am

    thanks

    Reply
13. pancowong says:

    28/02/2015 at 1:36 am

    dont work in find number.

    Reply
14. craisin1 says:

    28/02/2015 at 2:36 am

    My question is, why do you initialize the RichTextBox.Text back to blank
    and then re-input the same text value? Anyway, it put me on the right track
    and I thank you for that. Although I use VB.Net, it is dead easy to
    interpret C# Code into VB.Net (and vice-versa). Don’t you all just love the
    .Net framework? 🙂

    Reply
15. craisin1 says:

    28/02/2015 at 2:52 am

    For the search to work more than once (i.e. a subsequent search is
    performed) you must alter the first “While” statement to: while (index < richTextBox1.Text.LastIndexOf(textBox1.Text, richTextBox1.TextLength)

    Reply
16. laszap says:

    28/02/2015 at 3:33 am

    i really thank you for your very useful videos. in this tutoarial, the
    program underlines the line “index = richTextBox1.Text.IndexOf(textBox1,
    index) + 1;” telling that this method doesn’t exit with these arguments.
    How can i fix it ?

    Reply
17. Paul Andrew Doctolero says:

    28/02/2015 at 3:43 am

    Ghjhbkiguhhjjioiujgigtfjhfhfsfchk

    Reply
18. Yanky Kalifornia says:

    28/02/2015 at 4:20 am

    thank for the video

    Reply
19. Chee Yi Xu says:

    28/02/2015 at 4:29 am

    how do i search the word regardless of letter case?

    Reply
20. Jeremy Munene says:

    28/02/2015 at 5:02 am

    Firstly, thanks for these tutorials. Secondly when I search the first time
    its fine, but the second time it does not search

    Reply