TextBox Capacity?

[Patrick de Ridder]

What is the maximum string length a textbox will take?
Thank you.

 

[Noah Coad [MVP]]

Well the 'Text' property is of type string and a string has a 'Length'
property of type int and int.MaxValue is over 2 billion, which could
corrilate to an approximately 2GB string. So the point is that you'll
proboly hit an "OutOfMemoryException" before reaching its limit (at arround
700 million characters).

- Noah Coad -
Microsoft MVP

 

[Patrick de Ridder]

Thank you Noah for responding.

In the Properties Box there is a value MaxLength which is standard set to
32767.
Presumably they are characters. So do I need to change that vale if I want
to be sure that the textBox doesn't run out of capacity? Or should I measure
up the string all the time and add a bit of capacity when a threshold is
reached?

Patrick.

 

[Noah Coad [MVP]]

That's the limit on how many characters the user can enter, not the number
that can be displayed.

-Noah

 

[Patrick de Ridder]

Yes, so I just change that to say 1000000?
Please let me know.

 

[Noah Coad [MVP]]

Just give it a try. You can write some very simple test code, like this.

textBox1.Text = "".PadLeft(1000000 - 6, '-');
textBox1.Text += "ending";

 

[Patrick de Ridder]

Well, it took one heck of a time. And I could bake beans on
the processor afterwards. So the limitation is not so much
capacity, as it is speed. It just becomes non-feasible. I tried
1,000,000 characters by the way.