New feature: ASP•NET Memo Field supports Max Length (coming soon in v2013 vol 1)

The DevExpress ASP.NET Memo field now helps you to limit the amount of characters typed into it:

Server check

A nice feature of the DevExpress ASP.NET Memo control is that it will check the length on the sever side too. This way, some one cannot fraudulently try to change the limit on client-side.

While it’s possible to use JavaScript to validate form data entry, this approach can’t be totally relied upon (JavaScript may be disabled, and form data may not be trustworthy if the client has been affected by a nefarious script). Server–side validation is a much safer option, and could be used, among other things, to check that the amount of data submitted isn’t too long. –SitePoint

Uses Browser

The DevExpress ASP.NET Memo control will try to use the default browser behavior for enforcing the MaxLength limit. Otherwise, it will default to using an internal script, if necessary.

Why set a limit?

Setting a limit is a usability feature. This way, if your website visitors are typing a phone number or postal code, then you can help them by indicating what the maximum number of characters they can enter is.