VSVelmurugan S Syncfusion Team August 10, 2015 01:11 PM UTC
Hi Kovacs, Thank you for using Syncfusion products.
Your can meet your requirement on validate some input for instances subject and category through our custom window support and the same we have prepared the workaround sample to meet you requirement, which can be downloaded from the following location.
In the above sample we have validated the subject and category instances. If you missed to mention the subject value the error class added to the subject input box and the appointment doesn’t save and the same if you missed to mention the category value the alert window will display and appointment doesn’t save.
Please let us know if it helps and if you need any further assistance on this. Regards, Velmurugan