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class System.ComponentModel.NullableConverter

Assembly: System.ComponentModel.TypeConverter

Inheritance: object → TypeConverter → NullableConverter

Provides automatic conversion between a nullable type and its underlying primitive type.

Properties

public Type

NullableType

Gets the nullable type.

public Type

UnderlyingType

Gets the underlying type.

public TypeConverter

UnderlyingTypeConverter

Gets the underlying type converter.

Methods

public bool

CanConvertFrom(ITypeDescriptorContext? context, Type sourceType)

Returns whether this converter can convert an object of the given type to the type of this converter, using the specified context.

Returns <see langword="true" /> if this converter can perform the conversion; otherwise, <see langword="false" /> .

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

sourceType A <see cref="T:System.Type" /> that represents the type you want to convert from.

public bool

CanConvertTo(ITypeDescriptorContext context, Type destinationType)

Returns whether this converter can convert the object to the specified type, using the specified context.

Returns <see langword="true" /> if this converter can perform the conversion; otherwise, <see langword="false" /> .

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

destinationType A <see cref="T:System.Type" /> that represents the type you want to convert to.

public object

ConvertFrom(ITypeDescriptorContext context, Globalization.CultureInfo culture, object value)

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

Returns An <see cref="T:System.Object" /> that represents the converted value.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

culture The <see cref="T:System.Globalization.CultureInfo" /> to use as the current culture.

value The <see cref="T:System.Object" /> to convert.

public object

ConvertTo(ITypeDescriptorContext context, Globalization.CultureInfo culture, object value, Type destinationType)

Converts the given value object to the specified type, using the specified context and culture information.

Returns An <see cref="T:System.Object" /> that represents the converted value.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

culture The <see cref="T:System.Globalization.CultureInfo" /> to use as the current culture.

value The <see cref="T:System.Object" /> to convert.

destinationType The <see cref="T:System.Type" /> to convert the value parameter to.

public object

CreateInstance(ITypeDescriptorContext context, Collections.IDictionary propertyValues)

Creates an instance of the type that this <see cref="T:System.ComponentModel.TypeConverter" /> is associated with, using the specified context, given a set of property values for the object.

Returns An <see cref="T:System.Object" /> representing the given <see cref="T:System.Collections.IDictionary" /> , or <see langword="null" /> if the object cannot be created. This method always returns <see langword="null" /> .

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

propertyValues An <see cref="T:System.Collections.IDictionary" /> of new property values.

public bool

GetCreateInstanceSupported(ITypeDescriptorContext context)

Returns whether changing a value on this object requires a call to <see cref="M:System.ComponentModel.TypeConverter.CreateInstance(System.Collections.IDictionary)" /> to create a new value, using the specified context.

Returns <see langword="true" /> if changing a property on this object requires a call to <see cref="M:System.ComponentModel.TypeConverter.CreateInstance(System.Collections.IDictionary)" /> to create a new value; otherwise, <see langword="false" /> .

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

public PropertyDescriptorCollection

GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes)

Returns a collection of properties for the type of array specified by the value parameter, using the specified context and attributes.

Returns A <see cref="T:System.ComponentModel.PropertyDescriptorCollection" /> with the properties that are exposed for this data type, or <see langword="null" /> if there are no properties.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

value An <see cref="T:System.Object" /> that specifies the type of array for which to get properties.

attributes An array of type <see cref="T:System.Attribute" /> that is used as a filter.

public bool

GetPropertiesSupported(ITypeDescriptorContext context)

Returns whether this object supports properties, using the specified context.

Returns <see langword="true" /> if <see cref="M:System.ComponentModel.TypeConverter.GetProperties(System.Object)" /> should be called to find the properties of this object; otherwise, <see langword="false" /> .

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

public StandardValuesCollection

GetStandardValues(ITypeDescriptorContext context)

Returns a collection of standard values for the data type this type converter is designed for when provided with a format context.

Returns A <see cref="T:System.ComponentModel.TypeConverter.StandardValuesCollection" /> that holds a standard set of valid values, or <see langword="null" /> if the data type does not support a standard set of values.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context that can be used to extract additional information about the environment from which this converter is invoked. This parameter or properties of this parameter can be <see langword="null" /> .

public bool

GetStandardValuesExclusive(ITypeDescriptorContext context)

Returns whether the collection of standard values returned from <see cref="Overload:System.ComponentModel.TypeConverter.GetStandardValues" /> is an exclusive list of possible values, using the specified context.

Returns <see langword="true" /> if the <see cref="T:System.ComponentModel.TypeConverter.StandardValuesCollection" /> returned from <see cref="M:System.ComponentModel.TypeConverter.GetStandardValues" /> is an exhaustive list of possible values; <see langword="false" /> if other values are possible.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

public bool

GetStandardValuesSupported(ITypeDescriptorContext context)

Returns whether this object supports a standard set of values that can be picked from a list, using the specified context.

Returns <see langword="true" /> if <see cref="M:System.ComponentModel.TypeConverter.GetStandardValues" /> should be called to find a common set of values the object supports; otherwise, <see langword="false" /> .

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

public bool

IsValid(ITypeDescriptorContext context, object value)

Returns whether the given value object is valid for this type and for the specified context.

Returns <see langword="true" /> if the specified value is valid for this object; otherwise, <see langword="false" /> .

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

value The <see cref="T:System.Object" /> to test for validity.

public bool

CanConvertFrom(Type sourceType)

Inherited from TypeConverter

Returns whether this converter can convert an object of the given type to the type of this converter.

Returns <see langword="true" /> if this converter can perform the conversion; otherwise, <see langword="false" /> .

sourceType A <see cref="T:System.Type" /> that represents the type you want to convert from.

public bool

CanConvertTo(Type destinationType)

Inherited from TypeConverter

Returns whether this converter can convert the object to the specified type.

Returns <see langword="true" /> if this converter can perform the conversion; otherwise, <see langword="false" /> .

destinationType A <see cref="T:System.Type" /> that represents the type you want to convert to.

public object

ConvertFrom(object value)

Inherited from TypeConverter

Converts the given value to the type of this converter.

Returns An <see cref="T:System.Object" /> that represents the converted value.

value The <see cref="T:System.Object" /> to convert.

public object

ConvertFromInvariantString(ITypeDescriptorContext context, string text)

Inherited from TypeConverter

Converts the given string to the type of this converter, using the invariant culture and the specified context.

Returns An <see cref="T:System.Object" /> that represents the converted text.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

text The <see cref="T:System.String" /> to convert.

public object

ConvertFromInvariantString(string text)

Inherited from TypeConverter

Converts the given string to the type of this converter, using the invariant culture.

Returns An <see cref="T:System.Object" /> that represents the converted text.

text The <see cref="T:System.String" /> to convert.

public object

ConvertFromString(ITypeDescriptorContext context, Globalization.CultureInfo culture, string text)

Inherited from TypeConverter

Converts the given text to an object, using the specified context and culture information.

Returns An <see cref="T:System.Object" /> that represents the converted text.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

culture A <see cref="T:System.Globalization.CultureInfo" /> . If <see langword="null" /> is passed, the current culture is assumed.

text The <see cref="T:System.String" /> to convert.

public object

ConvertFromString(ITypeDescriptorContext context, string text)

Inherited from TypeConverter

Converts the given text to an object, using the specified context.

Returns An <see cref="T:System.Object" /> that represents the converted text.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

text The <see cref="T:System.String" /> to convert.

public object

ConvertFromString(string text)

Inherited from TypeConverter

Converts the specified text to an object.

Returns An <see cref="T:System.Object" /> that represents the converted text.

text The text representation of the object to convert.

public object

ConvertTo(object value, Type destinationType)

Inherited from TypeConverter

Converts the given value object to the specified type, using the arguments.

Returns An <see cref="T:System.Object" /> that represents the converted value.

value The <see cref="T:System.Object" /> to convert.

destinationType The <see cref="T:System.Type" /> to convert the <paramref name="value" /> parameter to.

public string

ConvertToInvariantString(ITypeDescriptorContext context, object value)

Inherited from TypeConverter

Converts the specified value to a culture-invariant string representation, using the specified context.

Returns A <see cref="T:System.String" /> that represents the converted value.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

value The <see cref="T:System.Object" /> to convert.

public string

ConvertToInvariantString(object value)

Inherited from TypeConverter

Converts the specified value to a culture-invariant string representation.

Returns A <see cref="T:System.String" /> that represents the converted value.

value The <see cref="T:System.Object" /> to convert.

public string

ConvertToString(ITypeDescriptorContext context, Globalization.CultureInfo culture, object value)

Inherited from TypeConverter

Converts the given value to a string representation, using the specified context and culture information.

Returns An <see cref="T:System.Object" /> that represents the converted value.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

culture A <see cref="T:System.Globalization.CultureInfo" /> . If <see langword="null" /> is passed, the current culture is assumed.

value The <see cref="T:System.Object" /> to convert.

public string

ConvertToString(ITypeDescriptorContext context, object value)

Inherited from TypeConverter

Converts the given value to a string representation, using the given context.

Returns An <see cref="T:System.Object" /> that represents the converted value.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

value The <see cref="T:System.Object" /> to convert.

public string

ConvertToString(object value)

Inherited from TypeConverter

Converts the specified value to a string representation.

Returns An <see cref="T:System.Object" /> that represents the converted value.

value The <see cref="T:System.Object" /> to convert.

public object

CreateInstance(Collections.IDictionary propertyValues)

Inherited from TypeConverter

Re-creates an <see cref="T:System.Object" /> given a set of property values for the object.

propertyValues An <see cref="T:System.Collections.IDictionary" /> that represents a dictionary of new property values.

protected Exception

GetConvertFromException(object value)

Inherited from TypeConverter

Returns an exception to throw when a conversion cannot be performed.

Returns An <see cref="T:System.Exception" /> that represents the exception to throw when a conversion cannot be performed.

value The <see cref="T:System.Object" /> to convert, or <see langword="null" /> if the object is not available.

protected Exception

GetConvertToException(object value, Type destinationType)

Inherited from TypeConverter

Returns an exception to throw when a conversion cannot be performed.

Returns An <see cref="T:System.Exception" /> that represents the exception to throw when a conversion cannot be performed.

value The <see cref="T:System.Object" /> to convert, or <see langword="null" /> if the object is not available.

destinationType A <see cref="T:System.Type" /> that represents the type the conversion was trying to convert to.

public bool

GetCreateInstanceSupported()

Inherited from TypeConverter

Returns whether changing a value on this object requires a call to the <see cref="M:System.ComponentModel.TypeConverter.CreateInstance(System.Collections.IDictionary)" /> method to create a new value.

public PropertyDescriptorCollection

GetProperties(ITypeDescriptorContext context, object value)

Inherited from TypeConverter

Returns a collection of properties for the type of array specified by the value parameter, using the specified context.

Returns A <see cref="T:System.ComponentModel.PropertyDescriptorCollection" /> with the properties that are exposed for this data type, or <see langword="null" /> if there are no properties.

context An <see cref="T:System.ComponentModel.ITypeDescriptorContext" /> that provides a format context.

value An <see cref="T:System.Object" /> that specifies the type of array for which to get properties.

public PropertyDescriptorCollection

GetProperties(object value)

Inherited from TypeConverter

Returns a collection of properties for the type of array specified by the value parameter.

Returns A <see cref="T:System.ComponentModel.PropertyDescriptorCollection" /> with the properties that are exposed for this data type, or <see langword="null" /> if there are no properties.

value An <see cref="T:System.Object" /> that specifies the type of array for which to get properties.

public bool

GetPropertiesSupported()

Inherited from TypeConverter

Returns whether this object supports properties.

public Collections.ICollection

GetStandardValues()

Inherited from TypeConverter

Returns a collection of standard values from the default context for the data type this type converter is designed for.

Returns A <see cref="T:System.ComponentModel.TypeConverter.StandardValuesCollection" /> containing a standard set of valid values, or <see langword="null" /> if the data type does not support a standard set of values.

public bool

GetStandardValuesExclusive()

Inherited from TypeConverter

Returns whether the collection of standard values returned from <see cref="M:System.ComponentModel.TypeConverter.GetStandardValues" /> is an exclusive list.

public bool

GetStandardValuesSupported()

Inherited from TypeConverter

Returns whether this object supports a standard set of values that can be picked from a list.

public bool

IsValid(object value)

Inherited from TypeConverter

Returns whether the given value object is valid for this type.

Returns <see langword="true" /> if the specified value is valid for this object; otherwise, <see langword="false" /> .

value The object to test for validity.

protected PropertyDescriptorCollection

SortProperties(PropertyDescriptorCollection props, string[] names)

Inherited from TypeConverter

Sorts a collection of properties.

Returns A <see cref="T:System.ComponentModel.PropertyDescriptorCollection" /> that contains the sorted properties.

props A <see cref="T:System.ComponentModel.PropertyDescriptorCollection" /> that has the properties to sort.

names An array of names in the order you want the properties to appear in the collection.

public bool

Equals(object obj)

Inherited from object

protected void

Finalize()

Inherited from object

public int

GetHashCode()

Inherited from object

public Type

GetType()

Inherited from object

protected object

MemberwiseClone()

Inherited from object

public string

ToString()

Inherited from object

Early Preview

class System.​ComponentModel.​NullableConverter

Properties

Methods

class System.ComponentModel.NullableConverter