Windows apps
Collapse the table of content
Expand the table of content
Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

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.

Exception Condition
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.

Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Return to top
Show:
© 2016 Microsoft