[RESOLVED] TextBox questions

[smertniki]

hello guys

I have two questions about textbox component...

1 - which is the maximum length and (if possible) how we can expand it?

2 - how to disable the vertical scrollbar of a multiline textbox while we are opening text files? usefull to speed up the opening process

Thanks!

[Siddharth Rout]

1. Normal Text box has a limit of 255 characters and multiline textbox has a limit of 32,000 characters

2. The scrollbar property is read only at runtime. if you want you can set it to none at designtime...

[smertniki]

Thanks for the informations koolsid!

[Merri]

To speed up opening process you should give the textbox the whole file at once. This means you should build up a string to put in the textbox.

The easiest way to read a whole file at once:

Open Filename For Input As #1
    Text1.Text = Input(LOF(1), #1)
Close #1

If you need to do other processing and thus can't read a file directly, do not use Text1.Text = Text1.Text & Something! This will be very slow. Use a string variable instead.

[smertniki]

To speed up opening process you should give the textbox the whole file at once. This means you should build up a string to put in the textbox.

The easiest way to read a whole file at once:

Open Filename For Input As #1
    Text1.Text = Input(LOF(1), #1)
Close #1

If you need to do other processing and thus can't read a file directly, do not use Text1.Text = Text1.Text & Something! This will be very slow. Use a string variable instead.

Thanks for the tips Merri, and very nice website btw

[smertniki]

Last question...

Does anyone knows an alternative component without that 32.000 characters limitation?

I'm looking for a component which can deal with huge data

Thanks!

[dee-u]

You could consider using Richtextbox instead.

[Merri]

However, at few megabytes RTB gets pretty slow and sluggish. You'd need to be able to have a component that doesn't load the entire file to memory at once, instead reads just the scroll positions and keeps track of any changes made so that it'll display things correctly. Doing only reading display is pretty easy, going for the editing business is the hard part.

UniText that I've made can also show more than 32768 characters.

[Tom Moran]

Actually the text box control can hold over 32K it just can't load it. You can do it however through the API. Check this link:

http://www.planet-source-code.com/vb...69294&lngWId=1

[smertniki]

Thanks a lot!