Insert Thousand separator as you type (as needed)

[Sintayehu]

I am on the 2013. 3.1204.1050 version.

Is there a way to make the thousand separator appear only when needed?

Example :
a numeric control with masking of #9.2, with thousand separator enabled, and a place holder of _

___,456,789.22
___,___,_89.22

Some users indicated this is obtrusive and less than attractive.

So we want to see if we can get rid of the place holder and have a thousand separator that gets inserted only as needed.

Currently if I replace the place holder with space I get ...

 ,456,789.22
 ,  , 89.22

Which is even more strange.

So the ideal condition is to insert the comma as user types and as needed:
 456,789.22
 89.22

Can you point me in the right direction on how to achieve this?

[Sintayehu]

I think I can just avoid the custom work by using the No Mask feature with String format ,Min and Max input extensions.

[Petar Mladenov]

Hello Sintayehu,

Yes FormatString and no-mask (Mask = "") is usually our suggestion for such requirements. Let us know if you need further assistance or if you find some issues with these settings.

Regards,
Petar Mladenov
Telerik

[Sintayehu]

Hello Petar,

I am using No mask with a Format string of "N2", the issue I am seeing is with the delete key.

When deleting a negative number like      -123,456,789.12.

- if Caret is after the - sign delete does the expected behavior up to the thousand separator, then as soon as it reaches the separator it deletes the entire field.
- if caret is before decimal point  the caret goes back to index 0 (before the - sign.)      

I have tried overriding the handledeletekeynomask function but it relies on internal object for its logic so I didn't pursue any further in that direction.

Once you guys provide possible solution to the above issues I would like to make the Delete key be able to delete the negative sign if the caret is before it. But this wouldn't work without resolving the first two issues.


I am on version 2013. 3.1204.1050.

Thanks for the help.                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

[Petar Mladenov]

Hi Sintayehu,

The Delete Key issue you mentioned will be resolved for the upcoming Q1 release in mid-February.
As for the minus sign deletion - this seems very custom requirement. That is why we highly encourage you to override the OnKeyDown method in class that inherits from NumericInput / CurrencyInput. This way you will be able to achieve *preview event* in Silverlight and perform custom logic for the delete key. 

Regards,
Petar Mladenov
Telerik