Question

MaxLength Doesn't Work With Javascript Turned Off???

Asked by: champ_010

Yikes, I have a web control:

<asp:textbox ID="mytext" TextMode="MultiLine" MaxLength="3500" runat="server"/>

but when JavaScript is turned off, the textbox will not limit user input.  However, a single line textbox will limit user input to the specified MaxLength.

Why is this and how to fix?  I really need it to work with JavaScript turned off.  Is putting a validation control the only way to sort of control it?

Thanks.

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Asked On
2007-01-08 at 22:45:26ID22115772
Tags

maxlength

,

multiline

,

textbox

,

work

Topic

Programming for ASP.NET

Participating Experts
3
Points
125
Comments
7

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Answers

 

by: arif_eqbalPosted on 2007-01-08 at 23:28:45ID: 18273752

Hi champ_010
Yes for a Multiline TextBox you need either some JavaScript or a Validation Control
I used RegularExpressionValidator for that

 

by: ajaysharmaapjsPosted on 2007-01-08 at 23:37:40ID: 18273788

 

by: MogalManicPosted on 2007-01-09 at 03:54:16ID: 18274695

The <asp:TextBox> control maps to the html <input type='text'> for small text entries and the html <textarea> field for large entries.  When a MaxLength is applied, it creates a size attribute on the <input> tag, but the <textarea> tag does not have a HTML maxlength (rows & cols attributes only specify the window size of textarea).

In order to specify the maximum length, you will need to either use server side validation, or javascript.  You can either do it manually, or use the <asp:LengthValidator> control.  I would recommend the lengthvalidator, because it has the ability to do BOTH server and client(javascript) validation.

 

by: champ_010Posted on 2007-01-09 at 08:56:41ID: 18276784

<asp:LengthValidator> -- nice to learn something new.  Thanks!!!

 

by: champ_010Posted on 2007-01-09 at 09:01:44ID: 18276840

Ummm...you said:

"You can either do it manually or use the  <asp:LengthValidator> control"

There's no such thing as a  <asp:LengthValidator> control--is this a custom control you created?  If so, can you share the code?  Or direct me to a reference for this new(?) validator?

Thanks.

 

by: arif_eqbalPosted on 2007-01-09 at 22:32:18ID: 18282036

As I mentioned in my earlier post you can use the RegularExpressionValidator
Arguably this is the easiest solution
This is the ValidationExpression for the RegularExpressionValidator
^(.|\n){0,3500}$

 

by: MogalManicPosted on 2007-01-15 at 03:49:40ID: 18315637

I'm sorry I didn't get back to you.  To answer your questions, there is no asp:LengthValidator, but it is a simple control to write or use the one ajaysharmaapjs suggested.  Or if it is just a onetime validation, you can just use CustomValidator with a ServerValidate.

20120131-EE-VQP-002

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