show/hide optionalLable on run time

[rafi]

Hi,

How can i enable/disable the optional label according to changes that occurs in the view model?

my dropDownList looks like this:

<input id="children" data-bind="kendoDropDownList: { optionLabel: optionLabel, dataTextField: 'text', dataValueField: 'value', data: children, value: selectedChild, change: onChangeChild }" />

the optionLabel is bound to observable objects that contains an empty string- which means null, or to other string.
but the kendoDropDownList doesn't change when this value changes in the model.

is there any option to sent an observable value for the optionLabel?

thanks!

[Alexander Popov]

Hello Rafi,

The DropDownList does not support binding of the optionLabel, however it is possible to achieve the same using a custom binding. Changing the option label can be done by using the setOptions method, then refreshing the widget. For example: 

ddl.setOptions({optionLabel: "New label"});
ddl.refresh();

Another approach would be to subscribe to the observable's change event and apply the same logic.

Regards,
Alexander Popov
Telerik