This is a migrated thread and some comments may be shown as answers.

don't allow user to write special characters in RadTextBox

9 Answers 843 Views
Input
This is a migrated thread and some comments may be shown as answers.
Mohammed
Top achievements
Rank 2
Mohammed asked on 14 Aug 2012, 08:04 PM
Hi,
how can I disable the user to write special characters in RadTextBox ? 
I'm also using the 
EmptyMessage property.

I want something like ajax toolkit filter extender 

9 Answers, 1 is accepted

Sort by
0
Mohammed
Top achievements
Rank 2
answered on 14 Aug 2012, 10:57 PM
Hi my friends,
i found a solution for my case and would like to share it with you : 

<telerik:RadTextBox ID="rtxtSerialNo" runat="server" MaxLength="40" Width="198px"
SelectionOnFocus="SelectAll" >
         <ClientEvents OnKeyPress="OnKeyPressSerialText"/>
</telerik:RadTextBox>


function OnKeyPressSerialText(sender, eventArgs) {
            var char = eventArgs.get_keyCharacter();
	    //will allow just letters, numbers and "-" letter 
            var exp = /[^a-zA-Z0-9-]/g;             if (exp.test(char)) {                 eventArgs.set_cancel(true);             }         }
0
Mayur
Top achievements
Rank 1
answered on 03 Sep 2012, 09:08 AM
Hi Mohammed,

I used your solution it works. But in firefox browser when i try to edit the text using back button or delete button, the editing does not happen. Instead i have to select and over write.

any suggestions ?
0
Princy
Top achievements
Rank 2
answered on 03 Sep 2012, 10:44 AM
Hi Manoj,

Modify the code as follows to achieve your scenario.

Javascript:
<script type="text/javascript">
function OnKeyPressSerialText(sender, eventArgs)
 {
  var code = eventArgs.get_keyCode();
  if (code == 8 || code == 46 || (36 < code <41)) // Checking whether the key pressed is backspace, Delete or One of the Arrow Keys.
  {
   return;
  }
  var char = eventArgs.get_keyCharacter();
  //will allow just letters, numbers and "-" letter
  var exp = /[^a-zA-Z0-9-]/g;
  if (exp.test(char))
  {
      eventArgs.set_cancel(true);
  }
 }
</script>

Hope this helps.

Thanks,
Princy.
0
Mohammed
Top achievements
Rank 2
answered on 03 Sep 2012, 11:22 AM
Thanks Princy,
0
Wayne
Top achievements
Rank 1
answered on 17 Apr 2018, 02:50 AM

Sorry I could not get this to work. Not calling the JS script. Is this also out of date as you don't have OnKeyPress its now ClientEvents-OnKeyPress.

Can you show this sample again with one aspx file and one js file.

Thank you

 

0
Eyup
Telerik team
answered on 19 Apr 2018, 01:21 PM
Hello Wayne,

Please try changing the if condition as follows:
if (code == 8 || code == 46 || (36 < code && code < 41))

I am also sending a sample working web site as requested.

Regards,
Eyup
Progress Telerik
Try our brand new, jQuery-free Angular components built from ground-up which deliver the business app essential building blocks - a grid component, data visualization (charts) and form elements.
0
Majeed
Top achievements
Rank 1
answered on 28 Jul 2018, 09:54 AM

Hi Mohammed,

this is not secured validation because If we disable the javascript from client browser than it will allow to enter restricted characetr in textbox

0
Majeed
Top achievements
Rank 1
answered on 28 Jul 2018, 09:57 AM

Hello Eyup,

I am facing some problem like Using Javascript for validation to restrict some special characters but one of our end user entered special characters by stopping/disabled the javascript from client browser.

kindly suggest me any better solution.

 

Thanks,

Majeed Khan

0
Eyup
Telerik team
answered on 02 Aug 2018, 05:34 AM
Hi Majeed,

Generally, for numeric input we suggest that RadNumericTextBox is used:
https://demos.telerik.com/aspnet-ajax/numerictextbox/overview/defaultcs.aspx

As for restricting some special symbols with RadTextBox, you can use javascript as with regular asp:TextBox. If this is not applicable for a specific user, I'm afraid this is not specifically related to Telerik and you can check discussions over the net for regular asp:TextBoxes or inputs on this matter and once you manage to achieve that, then you can use a similar logic for the RadTextBox as well.

Regards,
Eyup
Progress Telerik
Get quickly onboarded and successful with your Telerik and/or Kendo UI products with the Virtual Classroom free technical training, available to all active customers. Learn More.
Tags
Input
Asked by
Mohammed
Top achievements
Rank 2
Answers by
Mohammed
Top achievements
Rank 2
Mayur
Top achievements
Rank 1
Princy
Top achievements
Rank 2
Wayne
Top achievements
Rank 1
Eyup
Telerik team
Majeed
Top achievements
Rank 1
Share this question
or