IValueConverter.ConvertBack method

Applies to Windows and Windows Phone

Modifies the target data before passing it to the source object. This method is called only in TwoWay bindings.

Syntax


Object^ ConvertBack(
  Object^ value, 
  TypeName targetType, 
  Object^ parameter, 
  String^ language
)

Parameters

value

Type: System.Object [.NET] | Platform::Object [C++]

The target data being passed to the source.

targetType

Type: System.Type [.NET] | TypeName [C++]

The type of the target property, as a type reference (System.Type for .NET, a TypeName helper struct for C++/CX).

parameter

Type: System.Object [.NET] | Platform::Object [C++]

An optional parameter to be used in the converter logic.

language

Type: System.String [.NET] | Platform::String [C++]

The language of the conversion.

Return value

Type: System.Object [.NET] | Platform::Object [C++]

The value to be passed to the source object.

Remarks

If you don't use a converter for TwoWay bindings it's acceptable to leave ConvertBack unimplemented (uses the template default from Visual Studio where it returns a NotImplementedException).

Requirements

Minimum supported client

Windows 8

Minimum supported server

Windows Server 2012

Minimum supported phone

Windows Phone 8.1 [Windows Runtime apps only]

Namespace

Windows.UI.Xaml.Data
Windows::UI::Xaml::Data [C++]

Metadata

Windows.winmd

See also

IValueConverter
Convert
XAML data binding sample
Data binding overview

 

 

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