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Validation.MarkInvalid Method

Marks the specified BindingExpression object as invalid with the specified ValidationError object.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

public static void MarkInvalid(
	BindingExpressionBase bindingExpression,
	ValidationError validationError
You cannot use methods in XAML.


Type: System.Windows.Data.BindingExpressionBase

The BindingExpression object to mark as invalid.

Type: System.Windows.Controls.ValidationError

The ValidationError object to use.


If bindingExpression is null.


If validationError is null.

The BindingExpression object stays invalid until ClearInvalid is called or another transfer to the binding source validates successfully.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0
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