large text (1025k(1M) not editable inside textbox control.

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In a textbox control, I load text from a large file (1025k(1M)).
When I want to write something in that textbox, it does nothing!!
(except when I delete something with "Backspace" (but not with with "Delete"))
How do I correct this strange effect?

Posted 24-Feb-12 18:30pm

_Q12_

Updated 24-Feb-12 18:31pm

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OriginalGriff · Accepted Answer · 2012-02-24T21:41:00

Solution 1

By default, a TextBoix has it's MaxLength set to 32767 characters - you are exceeding this by a HUGE margin. If you change this property, it will work as you expect. But I would find a better solution if I was you - a 1M+ text box is going to be a real pain for your users!

Posted 24-Feb-12 21:41pm

OriginalGriff

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_Q12_ 25-Feb-12 8:20am

ok, thanks. I did not see that MaxLength property. I was wondering...what is the maximum number to put there? I like the infinite number a lot. :)
My resolve to the max number:
I made a richtextbox and I done this :
[textBox1.MaxLength = richBox2.MaxLength;]
The string I was able to read from that was:
2147483647
(two billion one hundred forty-seven million four hundred eighty-three thousand six hundred forty-seven) which I find is "the maximum value for a 32-bit signed integer in computing."-(from Wikipedia).
Unfortunately, my textBox1.MaxLength is limited to this:
[textBox1.MaxLength = Int32.MaxValue;] (same as richBox2,btw)
Thanks OriginalGriff. You saved me.

OriginalGriff 25-Feb-12 9:12am

It's not just the largest number you can put in 32 bits, it's also the largest size any one object can be in .NET - 2GB. So a string can be 2GB, or an array can be 2GB, so you could have an array of 500,000 strings each of which is 2GB, but you can't have a single string which is 2,147,483,648 bytes!

But please - think about your users! One huge text box is impossible to navigate, and very, very slow to load...