ImageFormatConverter 类

定义

ImageFormatConverter 是一个类,可用于将 ImageFormat 对象从一种数据类型转换为另一种数据类型。ImageFormatConverter is a class that can be used to convert ImageFormat objects from one data type to another. 通过 TypeDescriptor 对象访问此类。Access this class through the TypeDescriptor object.

public ref class ImageFormatConverter : System::ComponentModel::TypeConverter
public class ImageFormatConverter : System.ComponentModel.TypeConverter
type ImageFormatConverter = class
    inherit TypeConverter
Public Class ImageFormatConverter
Inherits TypeConverter
继承
ImageFormatConverter

注解

类型转换器用于在数据类型之间转换值。A type converter is used to convert values between data types. 类型转换器还支持在设计时配置属性, 方法是提供文本到值的转换或用户可以从中选择的值列表。A type converter also supports property configuration at design time by providing text-to-value conversion or a list of values that users can select from. 通过调用TypeDescriptor ImageFormatConverter 方法,通过GetConverter类访问类。Access the ImageFormatConverter class through the TypeDescriptor class by calling the GetConverter method.

ImageFormatConverterImageFormat中指定的一样, 与已知图像格式相互转换。The ImageFormatConverter converts to and from known image formats, as specified in the ImageFormat class.

备注

如果要在图像格式之间进行转换 (例如在 BMP 和 JPEG 之间进行转换), 请使用Image.Save ImageFormat采用对象作为参数的方法之一。If you want to convert between image formats, such as converting between BMP and JPEG, use one of the Image.Save methods that takes an ImageFormat object as a parameter.

构造函数

ImageFormatConverter()

初始化 ImageFormatConverter 类的新实例。Initializes a new instance of the ImageFormatConverter class.

方法

CanConvertFrom(ITypeDescriptorContext, Type)

指示此转换器是否可以将指定的源类型的对象转换为转换器的本机类型。Indicates whether this converter can convert an object in the specified source type to the native type of the converter.

CanConvertFrom(Type)

返回该转换器是否可以将给定类型的对象转换为此转换器的类型。Returns whether this converter can convert an object of the given type to the type of this converter.

(继承自 TypeConverter)
CanConvertTo(ITypeDescriptorContext, Type)

获取一个值,该值指示此转换器能否使用上下文将对象转换为指定的目标类型。Gets a value indicating whether this converter can convert an object to the specified destination type using the context.

CanConvertTo(Type)

返回此转换器是否可将该对象转换为指定的类型。Returns whether this converter can convert the object to the specified type.

(继承自 TypeConverter)
ConvertFrom(ITypeDescriptorContext, CultureInfo, Object)

将指定对象转换为 ImageFormat 对象。Converts the specified object to an ImageFormat object.

ConvertFrom(Object)

将给定值转换为此转换器的类型。Converts the given value to the type of this converter.

(继承自 TypeConverter)
ConvertFromInvariantString(ITypeDescriptorContext, String)

使用不变区域性和指定上下文将给定字符串转换为此转换器的类型。Converts the given string to the type of this converter, using the invariant culture and the specified context.

(继承自 TypeConverter)
ConvertFromInvariantString(String)

使用不变区域性将给定字符串转换为此转换器的类型。Converts the given string to the type of this converter, using the invariant culture.

(继承自 TypeConverter)
ConvertFromString(ITypeDescriptorContext, CultureInfo, String)

使用指定的上下文和区域性信息将给定的文本转换为对象。Converts the given text to an object, using the specified context and culture information.

(继承自 TypeConverter)
ConvertFromString(ITypeDescriptorContext, String)

使用指定的上下文将给定的文本转换为对象。Converts the given text to an object, using the specified context.

(继承自 TypeConverter)
ConvertFromString(String)

将指定文本转换为对象。Converts the specified text to an object.

(继承自 TypeConverter)
ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type)

将指定对象转换为指定类型。Converts the specified object to the specified type.

ConvertTo(Object, Type)

使用参数将给定的值对象转换为指定的类型。Converts the given value object to the specified type, using the arguments.

(继承自 TypeConverter)
ConvertToInvariantString(ITypeDescriptorContext, Object)

使用指定的上下文将指定的值转换为区域性不变的字符串表示形式。Converts the specified value to a culture-invariant string representation, using the specified context.

(继承自 TypeConverter)
ConvertToInvariantString(Object)

将指定值转换为区域性不变的字符串表示形式。Converts the specified value to a culture-invariant string representation.

(继承自 TypeConverter)
ConvertToString(ITypeDescriptorContext, CultureInfo, Object)

使用指定的上下文和区域性信息将给定的值转换为字符串表示形式。Converts the given value to a string representation, using the specified context and culture information.

(继承自 TypeConverter)
ConvertToString(ITypeDescriptorContext, Object)

使用给定的上下文将给定的值转换为字符串表示形式。Converts the given value to a string representation, using the given context.

(继承自 TypeConverter)
ConvertToString(Object)

将指定值转换为字符串表示形式。Converts the specified value to a string representation.

(继承自 TypeConverter)
CreateInstance(IDictionary)

在给定 Object 的一组属性值的情况下重新创建该对象。Re-creates an Object given a set of property values for the object.

(继承自 TypeConverter)
CreateInstance(ITypeDescriptorContext, IDictionary)

给定该对象的一组属性值,使用指定上下文创建与此 TypeConverter 相关联的类型的实例。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.

(继承自 TypeConverter)
Equals(Object)

确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(继承自 Object)
GetConvertFromException(Object)

返回无法执行转换时引发的异常。Returns an exception to throw when a conversion cannot be performed.

(继承自 TypeConverter)
GetConvertToException(Object, Type)

返回无法执行转换时引发的异常。Returns an exception to throw when a conversion cannot be performed.

(继承自 TypeConverter)
GetCreateInstanceSupported()

返回更改此对象的值是否求调用 CreateInstance(IDictionary) 方法来创建新值。Returns whether changing a value on this object requires a call to the CreateInstance(IDictionary) method to create a new value.

(继承自 TypeConverter)
GetCreateInstanceSupported(ITypeDescriptorContext)

返回有关更改该对象上的某个值是否需要使用指定的上下文调用 CreateInstance(IDictionary) 以创建新值的情况。Returns whether changing a value on this object requires a call to CreateInstance(IDictionary) to create a new value, using the specified context.

(继承自 TypeConverter)
GetHashCode()

用作默认哈希函数。Serves as the default hash function.

(继承自 Object)
GetProperties(ITypeDescriptorContext, Object)

使用指定的上下文返回值参数指定的数组类型的属性的集合。Returns a collection of properties for the type of array specified by the value parameter, using the specified context.

(继承自 TypeConverter)
GetProperties(ITypeDescriptorContext, Object, Attribute[])

使用指定的上下文和特性返回由 value 参数指定的数组类型的属性的集合。Returns a collection of properties for the type of array specified by the value parameter, using the specified context and attributes.

(继承自 TypeConverter)
GetProperties(Object)

返回由值参数指定的数组类型的属性集合。Returns a collection of properties for the type of array specified by the value parameter.

(继承自 TypeConverter)
GetPropertiesSupported()

返回此对象是否支持属性。Returns whether this object supports properties.

(继承自 TypeConverter)
GetPropertiesSupported(ITypeDescriptorContext)

使用指定的上下文返回该对象是否支持属性。Returns whether this object supports properties, using the specified context.

(继承自 TypeConverter)
GetStandardValues()

从默认的上下文返回此类型转换器设计用于的数据类型的标准值集合。Returns a collection of standard values from the default context for the data type this type converter is designed for.

(继承自 TypeConverter)
GetStandardValues(ITypeDescriptorContext)

获取一个集合,该集合包含此验证程序所面向的数据类型的标准值集。Gets a collection that contains a set of standard values for the data type this validator is designed for. 如果该数据类型不支持标准值集,则返回 nullReturns null if the data type does not support a standard set of values.

GetStandardValuesExclusive()

返回从 GetStandardValues() 返回的标准值的集合是否为独占列表。Returns whether the collection of standard values returned from GetStandardValues() is an exclusive list.

(继承自 TypeConverter)
GetStandardValuesExclusive(ITypeDescriptorContext)

使用指定的上下文返回从 GetStandardValues() 返回的标准值的集合是否为可能值的独占列表。Returns whether the collection of standard values returned from GetStandardValues() is an exclusive list of possible values, using the specified context.

(继承自 TypeConverter)
GetStandardValuesSupported()

返回此对象是否支持可以从列表中选取的标准值集。Returns whether this object supports a standard set of values that can be picked from a list.

(继承自 TypeConverter)
GetStandardValuesSupported(ITypeDescriptorContext)

指示此对象是否支持可以从列表中选取的标准值集。Indicates whether this object supports a standard set of values that can be picked from a list.

GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
IsValid(ITypeDescriptorContext, Object)

返回给定值对象对于此类型和此指定的上下文是否有效。Returns whether the given value object is valid for this type and for the specified context.

(继承自 TypeConverter)
IsValid(Object)

返回给定值对象对于此类型是否有效。Returns whether the given value object is valid for this type.

(继承自 TypeConverter)
MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
SortProperties(PropertyDescriptorCollection, String[])

对属性的集合进行排序。Sorts a collection of properties.

(继承自 TypeConverter)
ToString()

返回一个表示当前对象的 string。Returns a string that represents the current object.

(继承自 Object)

适用于

另请参阅