IntuneManagement 4.0.0-beta1

UI/WPF/Extensions/UIItemsArrayWPF.ps1

@@ -0,0 +1,17 @@
+# Null-free array for anything assigned to a WPF ItemsSource.
+#
+# A $null element in an ItemsControl kills the host: WPF's layout and automation
+# passes index the items, and both throw ArgumentNullException on a null one, on
+# every render, until the process dies. @($null) is a ONE-element array containing
+# null, so an omitted parameter or an empty result lands there via the usual @($x).
+# Full write-up and the regression proof: Tests/UIItemsArray.Tests.ps1.
+#
+# The leading comma is load-bearing. A bare `return @(...)` is unrolled by the
+# pipeline, so zero items would come back as $null and ONE item as the bare
+# object - which cannot be assigned to an ItemsSource at all.
+function Get-UIItemsArray
+{
+    param($Items)
+
+    return ,@(@($Items) | Where-Object { $null -ne $_ })
+}