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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)

abstract ConvertFrom : 
        context:ITypeDescriptorContext * 
        culture:CultureInfo * 
        value:Object -> Object 
override ConvertFrom : 
        context:ITypeDescriptorContext * 
        culture:CultureInfo * 
        value:Object -> Object 

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 a null reference (Nothing in Visual Basic), so always check it. Also, properties on the context object can return a null reference (Nothing in Visual Basic).

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, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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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