Results 1 to 4 of 4

Thread: [RESOLVED] Displaying Greek beta symbol in TreeView icon text (read from disk)

  1. #1

    Thread Starter
    Member
    Join Date
    Mar 2022
    Posts
    39

    Resolved [RESOLVED] Displaying Greek beta symbol in TreeView icon text (read from disk)

    I was able to paste a Greek beta symbol from the MS Windows Character Map (Microsoft Sans Serif) directly into code, and can compile, and run and the symbol shows when the text string is used for a Treeview icon's text. However, when I loop through the Treeview structure, and save all the icon text strings to an ascii text file, then load the text file and fill in the strings for each Treeview icon, there is a strange symbol showing for the Greek beta.

    What is the best practice for showing a Greek symbol in a Treeview icon's text string, saving this string to disk (ascii text), reading the file, and showing the Greek symbol in the respective Treeview icon's text? I do this all the time with HTML, but I think it's a UTF-16 issue(?).

    Is there a switch setting for a Treeview that needs to be set to recognize UTF-16 text string characters?
    Last edited by pel11; Jun 27th, 2022 at 05:05 PM.

  2. #2
    Fanatic Member Delaney's Avatar
    Join Date
    Nov 2019
    Location
    Paris, France
    Posts
    803

    Re: Displaying Greek beta symbol in TreeView icon text (read from disk)

    the Greek symbol are not ASCII character so when you save them, they are replaced by the ASCII character of the same code (if i remember correctly)

    try this page : https://stackoverflow.com/questions/...eek-characters

    an alternative is to write all your character in unicode and call them like that

    ChrW(&H3B1) (for alpha)

    https://www.rapidtables.com/code/tex...haracters.html
    Last edited by Delaney; Jun 26th, 2022 at 03:08 AM.
    The best friend of any programmer is a search engine
    "Don't wish it was easier, wish you were better. Don't wish for less problems, wish for more skills. Don't wish for less challenges, wish for more wisdom" (J. Rohn)
    “They did not know it was impossible so they did it” (Mark Twain)

  3. #3
    .NUT jmcilhinney's Avatar
    Join Date
    May 2005
    Location
    Sydney, Australia
    Posts
    108,822

    Re: Displaying Greek beta symbol in TreeView icon text (read from disk)

    Quote Originally Posted by pel11 View Post
    save all the icon text strings to an ascii text file
    That's the problem. It's nothing to do with the TreeView. If the characters are displaying correctly to begin with then there's obviously nothing wrong with the control. The issue is how you're saving the text. You haven't shown us that so we can't tell you what you're doing wrong. The only thing you can save as ASCII text is ASCII text. If you have Unicode text, save it as that.

  4. #4

    Thread Starter
    Member
    Join Date
    Mar 2022
    Posts
    39

    Re: Displaying Greek beta symbol in TreeView icon text (read from disk)

    The fix was to encode what was being saved, using, e.g.

    Code:
    Dim sw As StreamWriter = New StreamWriter(FileName, True, Encoding.Unicode)
    When reading in, you don't need to specify encoding in the streamreader, just use what you normally use:

    Code:
    Dim sr As New StreamReader(New FileStream(FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
    Works very good, the same Greek character as that one used in the code (pasted from the character map) was saved to disk, and the font size and family were preserved.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  



Click Here to Expand Forum to Full Width