DataColumnSelectionConverter 类

定义

为表示 GridView 控件中绑定列字段的字段名称的属性提供类型转换器。Provides a type converter for a property representing the field name of a bound column field in a GridView control.

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

注解

DataColumnSelectionConverter使用类在赋值前转换对象类型。Use the DataColumnSelectionConverter class to convert object types before assignment to a control property. 通常, DataColumnSelectionConverter类支持转换字符串对象类型, 并提供可用于分配给关联控件属性的标准值列表。In general, the DataColumnSelectionConverter class supports converting string object types and supplies a list of standard values available for assignment to the associated control property. 标准值集合是当前GridView控件的绑定列字段的字段名称列表。The standard values collection is the list of field names for bound column fields for the current GridView control.

若要支持转换其他对象类型, 请从DataColumnSelectionConverter派生一个类, 并重写其他对象类型的CanConvertFromConvertFrom方法。To support converting additional object types, derive a class from DataColumnSelectionConverter and override the CanConvertFrom and ConvertFrom methods for the additional object types. 若要支持标准可赋值值的自定义列表, GetStandardValues请重写方法。To support a custom list of standard assignable values, override the GetStandardValues method.

应用特性以将DataColumnSelectionConverter类指定为控件属性的类型转换器。 TypeConverterAttributeApply the TypeConverterAttribute attribute to specify the DataColumnSelectionConverter class as the type converter for a control property. 例如, GridView控件的RowHeaderColumn属性将指定DataColumnSelectionConverter为其类型转换器。For example, the RowHeaderColumn property of the GridView control specifies DataColumnSelectionConverter as its type converter.

备注

永远不应直接访问类型转换器。You should never access a type converter directly. 而应使用TypeDescriptor对象调用适当的转换器。Instead, call the appropriate converter by using a TypeDescriptor object. 有关详细信息, 请参阅中TypeConverter的示例。For more information, see the examples in TypeConverter.

方法指示转换器支持GetStandardValues通过方法返回可用值的列表。 GetStandardValuesSupportedThe GetStandardValuesSupported method indicates that the converter supports returning a list of available values through the GetStandardValues method. GetStandardValuesExclusive方法指示列表不是可能值的独占列表。The GetStandardValuesExclusive method indicates that the list is not an exclusive list of possible values.

构造函数

DataColumnSelectionConverter()

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

方法

CanConvertFrom(ITypeDescriptorContext, Type)

指示指定的源类型是否可转换为关联控件属性的类型。Indicates whether the specified source type can be converted to the type of the associated control property.

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)

返回此转换器能否使用指定上下文将对象转换为指定类型。Returns whether this converter can convert the object to the specified type, using the specified context.

(继承自 TypeConverter)
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)

将指定对象转换为关联控件属性的类型。Converts the specified object to the type of the associated control property.

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)

使用指定的上下文和区域性信息将给定值对象转换为指定的类型。Converts the given value object to the specified type, using the specified context and culture information.

(继承自 TypeConverter)
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)

返回当转换无法执行时所引发的异常。Returns an exception to throw when a conversion cannot be performed.

(继承自 TypeConverter)
GetConvertToException(Object, Type)

返回当转换无法执行时所引发的异常。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)

返回一个结果,即更改此对象上的某个值是否需要调用 CreateInstance(IDictionary) 以使用指定的上下文创建新值。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该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, 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)

通过使用指定的上下文,返回此对象是否支持属性。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)

返回可以分配给关联控件属性的可用值的列表。Returns a list of available values that can be assigned to the associated control property.

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)

指示此转换器是否返回一个列表,在其中包含可分配给关联的控件属性的所有可能值。Indicates whether this converter returns a list containing all possible values that can be assigned to the associated control property.

GetStandardValuesSupported()

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

(继承自 TypeConverter)
GetStandardValuesSupported(ITypeDescriptorContext)

指示在指定的上下文内,此转换器是否返回一组可以分配给控件属性的值。Indicates whether this converter returns a set of available values for assignment to a control property, within the specified context.

GetType()

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

(继承自 Object)
IsValid(ITypeDescriptorContext, Object)

返回给定的值对象是否对此类型和对指定的上下文有效。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()

返回表示当前对象的字符串。Returns a string that represents the current object.

(继承自 Object)

适用于

另请参阅