Keyboard Support
This article explains the keyboard shortcuts present in RadComboBox as well as the properties can be used for the keyboard navigation.
Keyboard Shortcuts
Using the keyboard you can perform some of the most common tasks. This section describes the keyboard shortcuts used by the RadComboBox.
F4 - pressing the F4 key will open the dropdown of RadComboBox when it is closed. Respectively, if your RadComboBox's dropdown is opened, pressing again the F4 key will submit the selection and close the dropdown.
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Up\Down - the Up and Down Arrow keys have two functions depending on the state of the dropdown:
When the dropdown of the RadComboBox is opened, then pressing Up\Down Arrows will change the highlighted item in the list.
When the dropdown of the RadComboBox is closed, then pressing Up\Down Arrows will change the SelectedItem.
Left\Right - the Left and Right Arrow keys have the same functions as the Up and Down. However, they will affect the selected\highlighted item only when the RadComboBox is not editable (the IsEditable property is set to False).
Enter - pressing the Enter key will take effect only when the dropdown is opened. It does two things: commits the selection and closes the dropdown of the RadComboBox.
Esc - pressing the Esc key will take effect only when the dropdown is opened. It does two things: cancels the selection and closes the dropdown of the RadComboBox.
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Home\End - pressing the Home\End keys will take effect only when the RadComboBox is not editable (the IsEditable property is set to False). These keys have two functions depending on the dropdown state:
When the dropdown of the RadComboBox is opened, then pressing the Home\End keys will change the highlighted item to the first\last item in the list.
When the dropdown of the RadComboBox is closed, then pressing the Home\End keys will change the selected item to the first\last item in the list.
Pressing the Home\End keys will affect the selected\highlighted item only when the IsEditable property is set to False.
- PageUp\PageDown - the PageUp and PageDown keys have one main function: pressing PageUp or PageDown will open the dropdown when it is closed. If the dropdown of the RadComboBox is opened, then pressing any of these keys will change the highlighted item.
Note that all shortcuts will affect the selected\highlighted item only when the RadComboBox is focused.
Properties
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TabNavigationExtensions.IsTabStop attached property indicates whether editable RadComboBox (IsEditable property is set to True) is included in the tab navigation cycle. Example 1 illustrates how to set that property in order to exclude the control from the tab navigation. The property is available since R3 2016.
Example 1: RadComboBox with TabNavigationExtensions.IsTabStop
<telerik:RadComboBox IsEditable="True" telerik:TabNavigationExtensions.IsTabStop="False" /> The TabIndex property defines the index of the control in the tab navigation cycle. The lower the number is, the earlier the control will be focused while navigating using the Tab key.
IsDropDownTabNavigationEnabled (introduced with Q1 2016) is a property of type bool that indicates whether the tab navigating inside the drop down portion of the control will be enabled. If the property is set to False the navigation between the items when Tab key gets pressed will be disabled - the default value is True.
IsDropDownTabNavigationEnabled affects only non-editable RadComboBoxes.