Data and Value BindingPremium
The ComboBox enables you to configure its predefined list of options and selected value.
To set the predefined option list, use the data property. To set the selected value, use the value property.
Data Binding
To bind the ComboBox to data, use the data property of the component.
The data property accepts both:
Arrays of Primitive Values
The following example demonstrates how to bind the ComboBox to an array of primitive values.
Datasets of Objects
If the ComboBox is bound to a dataset of objects, the value of the component will correspond to the selected object. To implement the approach, set the textField property.
By default, the ComboBox compares the items by reference. To specify a field from the data object which will be used for the comparison, utilize the dataItemKey property. The dataItemKey property is useful when the reference to the selected item which is configured in the value or defaultValue property do not match its corresponding item from the data collection. If dataItemKey is not set and the references in data and value do not correspond, the selected item will not be highlighted in the drop-down list.
Value Binding
To render the selected value, use the value property of the ComboBox. If you set the value through the value property, hook up to the onChange event and manually update the value of the value property.