Text File Load with VB.Net and Rich TextBox

~OSD~ 2,201

Feb 10, 2021, 10:06 PM

Hi,

I have text file which looks like as follows:

Now I used Rich Text Box to display the contents of this text file on VB form as:

RichTextBox1.LoadFile("D:\Backup\AppList.txt", RichTextBoxStreamType.PlainText)

I have noticed two strange characters (ÿþ) appended as:

or sometimes on top as:

Any thoughts why this strange characters appeared and how to get rid of them?

Xingyu Zhao-MSFT 5,371 Reputation points

Feb 11, 2021, 8:41 AM

Hi @~OSD~ ,
You can also share your text file here, and it will help us reproduce your problem.

Accepted answer

Viorel 121.3K Reputation points

Feb 11, 2021, 6:29 AM
Try an alternative:

RichTextBox1.Text = File.ReadAllText("D:\Backup\AppList.txt")

Or change the encoding of AppList.txt, if possible. Use “UTF-8 with signature” encoding.
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1 person found this answer helpful.
~OSD~ 2,201 Reputation points

Feb 11, 2021, 8:24 AM

Thanks, ReadAllText worked better compared to LoadFile.
I noticed also that text can easily be removed when displayed in RichTextBox. Can we further control it that data that is displayed in RichTextTextBox1 is read only (or similar, the purpose is to avoid any accidental modification in actual source file /AppList.txt).

Viorel 121.3K Reputation points

Feb 11, 2021, 10:50 AM

If you execute something like this:

fs = New FileStream("D:\Backup\AppList.txt", FileMode.Open, FileAccess.Read, FileShare.Read)

where fs is:

Private fs As FileStream ' a new class member

then the file will be protected against modification and deletion. To cancel such locking, execute:

fs.Dispose()

You can open a new question if this does not work.

~OSD~ 2,201 Reputation points

Feb 11, 2021, 11:27 AM

Thanks for reply.
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