Export (0) Print
Expand All

TypeConverter.ConvertFrom Method (ITypeDescriptorContext, CultureInfo, Object)

Converts the given object to the type of this converter, using the specified context and culture information.

Namespace:  System.ComponentModel
Assembly:  System (in System.dll)

public virtual Object ConvertFrom(
	ITypeDescriptorContext context,
	CultureInfo culture,
	Object value
)

Parameters

context
Type: System.ComponentModel.ITypeDescriptorContext

An ITypeDescriptorContext that provides a format context.

culture
Type: System.Globalization.CultureInfo

The CultureInfo to use as the current culture.

value
Type: System.Object

The Object to convert.

Return Value

Type: System.Object
An Object that represents the converted value.

ExceptionCondition
NotSupportedException

The conversion cannot be performed.

Custom type authors that intend to support a type conversion behavior for XAML typically implement a TypeConverter class that supports ConvertFrom behavior from a string. This behavior enables type conversion from the string provided as a XAML attribute value and provides a XAML processor with the support needed to create an object from the string, so that the object can be produced in a parsed object graph. Custom types or members of custom types are indicated by applying TypeConverterAttribute to the definitions, with the attribute referencing the custom TypeConverter implementation.

For XAML purposes, you do not typically provide branching implementations based on culture. This is because XAML is precompiled in a development environment context, and culture-specific information for runtime XAML is not relevant for XAML type conversion. For more information, see Type Converters for XAML Overview.

Notes to Inheritors

Override this method to provide your own conversion requirements.

Use the context parameter to extract additional information about the environment from which this converter is invoked. This parameter can be null, so always check it. Also, properties on the context object can return null.

For implementation patterns for type converters that are used to support XAML and custom types, see Type Converters for XAML Overview.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Show:
© 2014 Microsoft