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FrameworkPropertyMetadata.DefaultUpdateSourceTrigger Property

Gets or sets the default for UpdateSourceTrigger to use when bindings for the property with this metadata are applied, which have their UpdateSourceTrigger set to Default.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public UpdateSourceTrigger DefaultUpdateSourceTrigger { get; set; }
Members of this class are not typically used in XAML.

Property Value

Type: System.Windows.Data.UpdateSourceTrigger
A value of the enumeration, other than Default.

ExceptionCondition
ArgumentException

This property is set to Default; the value you set is supposed to become the default when requested by bindings.

InvalidOperationException

The metadata has already been applied to a dependency property operation, so that metadata is sealed and properties of the metadata cannot be set.

Properties on derived classes of PropertyMetadata are typically defined in the object model as read-write. This is so they can be adjusted after initialization of the instance. However, after the metadata is consumed as part of a call to Register, AddOwner, or OverrideMetadata, the property system will seal that metadata instance and properties that convey the specifics of the metadata are now considered immutable. Attempting to set this property after IsSealed is true on this metadata instance will raise an exception.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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