Filter a gallery by drop down or combo box, but with an 'ALL' option

[SachS]

I have a simple app with a gallery showing a list of assets (base is a SP list using the default 'assets' template). One of the columns in the list is 'AssetType' (=Smartphone, Laptop, Printer, Accessory).

I would like to give the user the ability to filter the list by AssetType. So far, I've done the following using a combo box:

ComboBox items

items = Choices('Asset Manager'.'Asset type')

Gallery items

items = Filter('Asset Manager', 'Asset type'.Value = ComboBox3.Selected.Value)

This works fine, and the gallery changes based on drop down selection. But the obvious issue is that when no items is selected, the gallery too will show no items. Is there a way to either:

• Add an 'ALL' item to the combo box so that when it's selected the gallery will show all items.
• Or, when no item is selected in the combo box, the gallery will show all items.

Is either of those a possibility?

[PowerRanger · Accepted solution]

@SachS 

Use this for Gallery items

Filter(
    'Asset Manager',
    'Asset type'.Value = ComboBox3.Selected.Value || IsBlank(ComboBox3.Selected.Value)
)

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