Posted 25 Apr 2012
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I have moved this original thread to the MVVM area: http://www.kendoui.com/forums/framework/mvvm/unable-to-delete-numeric-or-date-value-and-have-model-update.aspx#2084418.
After more investigation, the controls (DatePicker and NumericTextBox) appear to be doing their part. Both control types do indeed have their values set to NULL and appear to be triggering the change event. It would seem the datasource is ignoring the change event if the value is NULL for numerics and dates.