Fixed a bug in TokenizingTextBox

Sergio0694 · Sergio0694 · commit 422fa6c58283 · 2021-02-22T20:45:12.000+01:00
diff --git a/Microsoft.Toolkit.Uwp.UI.Controls.Input/TokenizingTextBox/TokenizingTextBox.cs b/Microsoft.Toolkit.Uwp.UI.Controls.Input/TokenizingTextBox/TokenizingTextBox.cs
@@ -532,7 +532,7 @@ private void GuardAgainstPlaceholderTextLayoutIssue()
             //
             // To combat this issue:
             //   We toggle the visibility of the Placeholder ContentControl in order to force it's layout to update properly
-            var placeholder = ContainerFromItem(_lastTextEdit).FindDescendant("PlaceholderTextContentPresenter");
+            var placeholder = ContainerFromItem(_lastTextEdit)?.FindDescendant("PlaceholderTextContentPresenter");
 
             if (placeholder?.Visibility == Visibility.Visible)
             {

Original file line number	Diff line number	Diff line change
`@@ -532,7 +532,7 @@ private void GuardAgainstPlaceholderTextLayoutIssue()`
`532`	`532`	`//`
`533`	`533`	`// To combat this issue:`
`534`	`534`	`// We toggle the visibility of the Placeholder ContentControl in order to force it's layout to update properly`
`535`		`- var placeholder = ContainerFromItem(_lastTextEdit).FindDescendant("PlaceholderTextContentPresenter");`
	`535`	`+ var placeholder = ContainerFromItem(_lastTextEdit)?.FindDescendant("PlaceholderTextContentPresenter");`
`536`	`536`
`537`	`537`	`if (placeholder?.Visibility == Visibility.Visible)`
`538`	`538`	`{`