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Autostretch lable or textbox

Posted on 2004-04-10
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Last Modified: 2008-01-09
i'm looking for a multiline textbox or lable that would change its height (Size.Y) property to avoid vertical scrollbars! while being a perfect fit (no waisted space at the bottom!).

or

a windows control or a way to create an auto strech text control! It could be a textbox label or even drawing text using GDI! All I want is to be able to tell what’s the triangle size covered by the text! So I can resize the window containing the text control to surround the text without waited space! It should support multiline text as well!

a good example would be a list view that that would resize its self to avoid scroll bars!
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Question by:keivan_b
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caner_elci earned 540 total points
ID: 10800131
There is a method of Graphics class, which gives exactly what you need: MeasureString(). As far as I know, it accepts multi-line strings too.. Just try something like this in textBox1's TextChange event:

Graphics g = Graphics.FromHwnd( textBox1.Handle );
SizeF textSize = g.MeasureString( textBox1.Text, textBox1.Font, 0, StringFormat.GenericDefault );
textBox1.Width = (int)textSize.Width;
textBox1.Height = (int)textSize.Height;

I think this will help you.. But you may need to do some optimizations, adding textbox borders etc...

Caner ELCI
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Expert Comment

by:AlexFM
ID: 10801194
Use DrawText API with DT_CALCRECT flag. To get hDC parameter use GetDC API.
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Expert Comment

by:caner_elci
ID: 10801201
Isn't this C# board???
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Expert Comment

by:AlexFM
ID: 10801224
Yes.
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Author Comment

by:keivan_b
ID: 10801824
caner_elci, i tried your answer but it doesn't seem to care about the height as it resizes the text box too a long one so all the text fit in one line!

this is my form load hanndler:

this.textBox1.Text="asdasdads asdadada  asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada asdadada";

Graphics g = Graphics.FromHwnd( textBox1.Handle );
SizeF textSize = g.MeasureString( textBox1.Text, textBox1.Font, 0, StringFormat.GenericDefault );
textBox1.Width = (int)textSize.Width;
textBox1.Height = (int)textSize.Height;
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Author Comment

by:keivan_b
ID: 10801852
ok, i found a way to fix it!

MeasureString has an overload:
SizeF textSize = g.MeasureString(textBox1.Text, textBox1.Font,textBox1.Width);
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Expert Comment

by:caner_elci
ID: 10806399
Well, you could also not set the width of textBox1.. Anyway, I think it works well now?
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