ExpandableObjectConverter Class

.NET Framework (current version)

Provides a type converter to convert expandable objects to and from various other representations.

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

Inheritance Hierarchy

System::Object
System.ComponentModel::TypeConverter
System.ComponentModel::ExpandableObjectConverter
System.Drawing::IconConverter
System.Drawing.Printing::MarginsConverter
System.Windows.Forms::ColumnHeaderConverter
System.Windows.Forms::ListViewItemConverter
System.Windows.Xps.Serialization::ColorTypeConverter
System.Windows.Xps.Serialization::FontTypeConverter
System.Windows.Xps.Serialization::ImageSourceTypeConverter

Syntax

C++

[HostProtectionAttribute(SecurityAction::LinkDemand, SharedState = true)]
public ref class ExpandableObjectConverter : TypeConverter

Constructors

	Name	Description
	ExpandableObjectConverter()	Initializes a new instance of the ExpandableObjectConverter class.

Methods

	Name	Description
	CanConvertFrom(ITypeDescriptorContext^, Type^)	Returns whether this converter can convert an object of the given type to the type of this converter, using the specified context.(Inherited from TypeConverter.)
	CanConvertFrom(Type^)	Returns whether this converter can convert an object of the given type to the type of this converter.(Inherited from TypeConverter.)
	CanConvertTo(ITypeDescriptorContext^, Type^)	Returns whether this converter can convert the object to the specified type, using the specified context.(Inherited from TypeConverter.)
	CanConvertTo(Type^)	Returns whether this converter can convert the object to the specified type.(Inherited from TypeConverter.)
	ConvertFrom(ITypeDescriptorContext^, CultureInfo^, Object^)	Converts the given object to the type of this converter, using the specified context and culture information.(Inherited from TypeConverter.)
	ConvertFrom(Object^)	Converts the given value to the type of this converter.(Inherited from TypeConverter.)
	ConvertFromInvariantString(ITypeDescriptorContext^, String^)	Converts the given string to the type of this converter, using the invariant culture and the specified context.(Inherited from TypeConverter.)
	ConvertFromInvariantString(String^)	Converts the given string to the type of this converter, using the invariant culture.(Inherited from TypeConverter.)
	ConvertFromString(ITypeDescriptorContext^, CultureInfo^, String^)	Converts the given text to an object, using the specified context and culture information.(Inherited from TypeConverter.)
	ConvertFromString(ITypeDescriptorContext^, String^)	Converts the given text to an object, using the specified context.(Inherited from TypeConverter.)
	ConvertFromString(String^)	Converts the specified text to an object.(Inherited from TypeConverter.)
	ConvertTo(ITypeDescriptorContext^, CultureInfo^, Object^, Type^)	Converts the given value object to the specified type, using the specified context and culture information.(Inherited from TypeConverter.)
	ConvertTo(Object^, Type^)	Converts the given value object to the specified type, using the arguments.(Inherited from TypeConverter.)
	ConvertToInvariantString(ITypeDescriptorContext^, Object^)	Converts the specified value to a culture-invariant string representation, using the specified context.(Inherited from TypeConverter.)
	ConvertToInvariantString(Object^)	Converts the specified value to a culture-invariant string representation.(Inherited from TypeConverter.)
	ConvertToString(ITypeDescriptorContext^, CultureInfo^, Object^)	Converts the given value to a string representation, using the specified context and culture information.(Inherited from TypeConverter.)
	ConvertToString(ITypeDescriptorContext^, Object^)	Converts the given value to a string representation, using the given context.(Inherited from TypeConverter.)
	ConvertToString(Object^)	Converts the specified value to a string representation.(Inherited from TypeConverter.)
	CreateInstance(IDictionary^)	Re-creates an Object given a set of property values for the object.(Inherited from TypeConverter.)
	CreateInstance(ITypeDescriptorContext^, IDictionary^)	Creates an instance of the type that this TypeConverter is associated with, using the specified context, given a set of property values for the object.(Inherited from TypeConverter.)
	Equals(Object^)	Determines whether the specified object is equal to the current object.(Inherited from Object.)
	Finalize()	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)
	GetConvertFromException(Object^)	Returns an exception to throw when a conversion cannot be performed.(Inherited from TypeConverter.)
	GetConvertToException(Object^, Type^)	Returns an exception to throw when a conversion cannot be performed.(Inherited from TypeConverter.)
	GetCreateInstanceSupported()	Returns whether changing a value on this object requires a call to the CreateInstance method to create a new value.(Inherited from TypeConverter.)
	GetCreateInstanceSupported(ITypeDescriptorContext^)	Returns whether changing a value on this object requires a call to CreateInstance to create a new value, using the specified context.(Inherited from TypeConverter.)
	GetHashCode()	Serves as the default hash function. (Inherited from Object.)
	GetProperties(ITypeDescriptorContext^, Object^)	Returns a collection of properties for the type of array specified by the value parameter, using the specified context.(Inherited from TypeConverter.)
	GetProperties(ITypeDescriptorContext^, Object^, array<Attribute^>^)	Gets a collection of properties for the type of object specified by the value parameter.(Overrides TypeConverter::GetProperties(ITypeDescriptorContext^, Object^, array<Attribute^>^).)
	GetProperties(Object^)	Returns a collection of properties for the type of array specified by the value parameter.(Inherited from TypeConverter.)
	GetPropertiesSupported()	Returns whether this object supports properties.(Inherited from TypeConverter.)
	GetPropertiesSupported(ITypeDescriptorContext^)	Gets a value indicating whether this object supports properties using the specified context.(Overrides TypeConverter::GetPropertiesSupported(ITypeDescriptorContext^).)
	GetStandardValues()	Returns a collection of standard values from the default context for the data type this type converter is designed for.(Inherited from TypeConverter.)
	GetStandardValues(ITypeDescriptorContext^)	Returns a collection of standard values for the data type this type converter is designed for when provided with a format context.(Inherited from TypeConverter.)
	GetStandardValuesExclusive()	Returns whether the collection of standard values returned from GetStandardValues is an exclusive list.(Inherited from TypeConverter.)
	GetStandardValuesExclusive(ITypeDescriptorContext^)	Returns whether the collection of standard values returned from GetStandardValues is an exclusive list of possible values, using the specified context.(Inherited from TypeConverter.)
	GetStandardValuesSupported()	Returns whether this object supports a standard set of values that can be picked from a list.(Inherited from TypeConverter.)
	GetStandardValuesSupported(ITypeDescriptorContext^)	Returns whether this object supports a standard set of values that can be picked from a list, using the specified context.(Inherited from TypeConverter.)
	GetType()	Gets the Type of the current instance.(Inherited from Object.)
	IsValid(ITypeDescriptorContext^, Object^)	Returns whether the given value object is valid for this type and for the specified context.(Inherited from TypeConverter.)
	IsValid(Object^)	Returns whether the given value object is valid for this type.(Inherited from TypeConverter.)
	MemberwiseClone()	Creates a shallow copy of the current Object.(Inherited from Object.)
	SortProperties(PropertyDescriptorCollection^, array<String^>^)	Sorts a collection of properties.(Inherited from TypeConverter.)
	ToString()	Returns a string that represents the current object.(Inherited from Object.)

This class adds support for properties on an object to the methods and properties provided by TypeConverter. To make a type of property expandable in the PropertyGrid, specify this TypeConverter for standard implementations of GetPropertiesSupported and GetProperties. Mark child properties with the NotifyParentPropertyAttribute to ensure correct behavior in a PropertyGrid control.

Note
You should never access a type converter directly. Instead, call the appropriate converter by using TypeDescriptor. For more information, see the examples in the TypeConverter base class.

For more information about type converters, see the TypeConverter base class and How to: Implement a Type Converter.

Examples

The following code example converts a variable of type Margins to a string variable.

C++

String^ strM = "1,2,3,4";
System::Drawing::Printing::Margins^ m = gcnew System::Drawing::Printing::Margins( 1,2,3,4 );
Console::WriteLine( TypeDescriptor::GetConverter( strM )->CanConvertTo( System::Drawing::Printing::Margins::typeid ) );
Console::WriteLine( TypeDescriptor::GetConverter( m )->ConvertToString( m ) );

The following code example demonstrates how to use the NotifyParentPropertyAttribute and the ExpandableObjectConverter class to create an expandable property on a custom control. This code example is part of a larger example provided for the NotifyParentPropertyAttribute class.

C++

No code example is currently available or this language may not be supported.