Add SelectAll CheckBox to MultiSelectionComboBox

[LiTo96]

Describe the feature

In the MultiSelectionComboBox there should be a CheckBox which allows you to select/unselect all options at once like in the following gif:

And then there should be also a Property which allows to show/hide that SelectAll-CheckBox and set the text for it.

<MultiSelectionComboBox ShowSelectAllCheckBox="True" SelectAllText="Select All"/>

[timunie]

Use Footer / Header for this. You can simply implement this function as needed for you.

[William-Joshua]

Use Footer / Header for this. You can simply implement this function as needed for you.

Hello, can you tell me how to use the DropDownHeaderContentTemplate / DropDownFooterContentTemplate with staticresource Datatemplate , I binded it ,but it not activated, I don't know ,what's wrong with it

Thanks a lot

[William-Joshua]

Use Footer / Header for this. You can simply implement this function as needed for you.

Hello, can you tell me how to use the DropDownHeaderContentTemplate / DropDownFooterContentTemplate with staticresource Datatemplate , I binded it ,but it not activated, I don't know ,what's wrong with it

Thanks a lot

Set IsDropDownHeaderVisible = true or IsDropDownFooterVisible = true can show it