ross dickinson: web and desktop software developer

ASP.Net's TextBox class and MaxLength

by Ross on July 26, 2010 at 3:14 PM under Programming | ASP.Net

You learn something new every day!

It appears that ASP.Net's TextBox class doesn't have any built-in validation for trimming the Text property's length if the MaxLength property is set to a value greater than zero.

I suppose this is to give user's more leeway in how they want to validate the control, but it's not immediately obvious that a user can get around this limitation just by altering the html! ie: A user could use the FireFox FireBug extension to remove the textbox input's maxlength attribute and load it up with as much text as they'd like!

So remember kids: Always validate your input!

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rossisdead is a 26 year old web and desktop software developer from New Jersey. He has two cats and likes long walks on the beach.

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