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HomeHomeDNN Open Source...DNN Open Source...Module ForumsModule ForumsRepositoryRepositoryLimiting length of description field in a template?Limiting length of description field in a template?
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6/15/2011 7:41 AM
 
roland kamsika


Joined: 3/3/2011
Posts: 19
How would I limit the length of the Description field in a template?
 
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6/15/2011 9:55 AM
 
Steve Fabian


Steve Fabian's Avatar

Joined: 3/4/2003
Posts: 2111
There's nothing in the template or settings that you can do to set a character limit on a multiline text box.  ASP.NET renders it as a text area which does not have a MaxLength property.  You could accomplish it however, with a little jQuery. Add some script to the footer.html template to capture the keypress on the Description field and suppress any keystrokes once the desired length has been reached.  

I would also suggest you have a little div area in your template.html file where your jQuery function can display a message as to why the keystrokes aren't working from the user's perspective.  You might even have a little character counter displayed as they type.. something like .... "140 character maximum, 37 characters left" ... which you can place under the Description field text area.



 Steve Fabian
e: steve.fabian@gooddogs.com
w: http://www.gooddogs.com
 
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6/15/2011 11:24 AM
 
Steve Fabian


Steve Fabian's Avatar

Joined: 3/4/2003
Posts: 2111
oops, sorry ... you would add the jQuery to the   form.html  template file, not the footer.html file.



 Steve Fabian
e: steve.fabian@gooddogs.com
w: http://www.gooddogs.com
 
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8/3/2011 4:28 AM
 
roland kamsika


Joined: 3/3/2011
Posts: 19
Is there any chance you could post some example code to illustrate how to do this? My Jscript is poor and I don't know how to capture the keypress.

TIA
 
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8/3/2011 5:27 AM
 
roland kamsika


Joined: 3/3/2011
Posts: 19
I added the following script at the bottom of the form.html file, but when I view the page I get the error "Multiple controls with the same ID '__TEDescription' were found. FindControl requires that controls have unique IDs."
What did I do wrong?

<script src="http://api.jquery.com/scripts/events.js"></script>
<script>
var xTriggered = 0;
$("#[DESCRIPTION]").keypress(function(event) {
  if ( event.which == 13 ) {
     event.preventDefault();
   }
   xTriggered++;
   var msg = "Handler for .keypress() called " + xTriggered + " time(s).";
  $.print( msg, "html" );
  $.print( event );
});
});</script>
 
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