Data validation

[Bruno Pires]

Hi,

I'm trying to understand how the valition works when using SfTextBox with IDataValidation.

I've implemented the control as the documentation says, but i'm not seing a way to manually trigger the validation, before attempting form submission.

Best,
Bruno

[Sridevi Sivakumar]

Hi Bruno,

Thank you for using Syncfusion products.

The IDataValidation interface in the SfTextBoxExt has two API’s Error and this[string columnname]. The “this[string columnname]“ is used to get the instance of the control added the application and the “Error” API is used to return the error msg which we can return if we need to have a common log for all the instance of the control and can use the other for having specific error logs for each instance. It is recommended to use the this[string columnname] to have the validation of the control which you have currently using.

we have achieved your requirement using textchanged event.Please find sample from given below

Sample Link: http://www.syncfusion.com/downloads/support/forum/138705/ze/Sample-423760758  

Please check the sample if it meets your requirement and let us know if you have any concern.
Regards,
Sridevi S. 

[Bruno Pires]

Hi,

Appreciate the reply, but the link is for a sample for autocomplete, and has no validation in place.

Regarding your comment, do you mean i should use the textchanged event to trigger the validation manually? If so, can you tell me witch API to call to trigger the validation?

Best,

Bruno

[Bruno Pires]

Hi again,

So i found out why the validation wasn't being triggered, if the binding is done with the x:bind instead of binding keyword, the validation isn't triggered.

So, now if get the texbox border red when the validtion fails, but not error message, is it the suposed to be like that?

Thanks,

Bruno

[Sridevi Sivakumar]

Hi  Bruno,

We would like to inform you that IDataValiation will not trigger any validation popup or message by itself before form submission. It will validate the Text of SfTextBoxExt control based on the validation condition and set the HasError attached property in DataValidation class. Using this property you can show/hide the validation error message in your application. We have prepared a sample for the same. You can download the sample from following link:

Sample Link: http://www.syncfusion.com/downloads/support/forum/138705/ze/AutoUWP-1763708155  

Regards
Sridevi S.