DataFieldConverter DataFieldConverter DataFieldConverter DataFieldConverter Class

定義

提供型別轉換子,可從目前元件的選取資料來源擷取資料欄位清單。Provides a type converter that can retrieve a list of data fields from the current component's selected data source.

public ref class DataFieldConverter : System::ComponentModel::TypeConverter
public class DataFieldConverter : System.ComponentModel.TypeConverter
type DataFieldConverter = class
    inherit TypeConverter
Public Class DataFieldConverter
Inherits TypeConverter
繼承
DataFieldConverterDataFieldConverterDataFieldConverterDataFieldConverter

範例

   // Associates the DataFieldConverter with a string property.
public:
   [TypeConverterAttribute(DataMemberConverter::typeid)]
   property String^ dataField 
   {
      String^ get()
      {
         return field;
      }
      void set( String^ value )
      {
         field = value;
      }
   }
private:
   String^ field;
// Associates the DataFieldConverter with a string property.
[TypeConverterAttribute(typeof(DataMemberConverter))]
public string dataField
{
    get
    {
        return field;
    }
    set
    {
        field = value;
    }
}
private string field;
' Associates the DataFieldConverter with a string property.   
<TypeConverterAttribute(GetType(DataMemberConverter))>  _
Public Property dataField() As String
   Get
      Return field
   End Get
   Set
      field = value
   End Set
End Property
Private field As String

備註

DataFieldConverter可以從目前的設計階段元件資料來源中取出資料欄位清單。DataFieldConverter can retrieve a list of data fields from the current data source of a design-time component.

會使用Visual Studio 2005Visual Studio 2005這個類型轉換子來提供屬性視窗中的資料欄位清單中所顯示的值。This type converter is used by Visual Studio 2005Visual Studio 2005 to provide the values that appear in the list of data fields in the Properties window.

警告

您不應該直接存取類型轉換器。You should never access a type converter directly. 相反地, 請使用TypeDescriptor來呼叫適當的轉換器。Instead, call the appropriate converter by using TypeDescriptor. 如需詳細資訊, 請參閱TypeConverter基類中的範例。For more information, see the examples in the TypeConverter base class.

如需類型轉換器的詳細資訊, 請TypeConverter參閱基底類別和如何:執行類型轉換器For more information about type converters, see the TypeConverter base class and How to: Implement a Type Converter.

建構函式

DataFieldConverter() DataFieldConverter() DataFieldConverter() DataFieldConverter()

初始化 DataFieldConverter 類別的新執行個體。Initializes a new instance of the DataFieldConverter class.

方法

CanConvertFrom(ITypeDescriptorContext, Type) CanConvertFrom(ITypeDescriptorContext, Type) CanConvertFrom(ITypeDescriptorContext, Type) CanConvertFrom(ITypeDescriptorContext, Type)

取得值,表示轉換器是否可以將指定來源型別中的物件轉換成轉換器原生型別。Gets a value indicating whether the converter can convert an object of the specified source type to the native type of the converter.

CanConvertFrom(Type) CanConvertFrom(Type) CanConvertFrom(Type) CanConvertFrom(Type)

傳回值,指出這個轉換子是否可將指定之型別的物件轉換為這個轉換子的型別。Returns whether this converter can convert an object of the given type to the type of this converter.

(Inherited from TypeConverter)
CanConvertTo(ITypeDescriptorContext, Type) CanConvertTo(ITypeDescriptorContext, Type) CanConvertTo(ITypeDescriptorContext, Type) CanConvertTo(ITypeDescriptorContext, Type)

傳回這個轉換器是否可以使用指定的內容,將物件轉換成指定的類型。Returns whether this converter can convert the object to the specified type, using the specified context.

(Inherited from TypeConverter)
CanConvertTo(Type) CanConvertTo(Type) CanConvertTo(Type) CanConvertTo(Type)

傳回值,指出這個轉換子是否可以將物件轉換成指定的型別。Returns whether this converter can convert the object to the specified type.

(Inherited from TypeConverter)
ConvertFrom(ITypeDescriptorContext, CultureInfo, Object) ConvertFrom(ITypeDescriptorContext, CultureInfo, Object) ConvertFrom(ITypeDescriptorContext, CultureInfo, Object) ConvertFrom(ITypeDescriptorContext, CultureInfo, Object)

將指定的物件轉換成轉換子的原生型別。Converts the specified object to the native type of the converter.

ConvertFrom(Object) ConvertFrom(Object) ConvertFrom(Object) ConvertFrom(Object)

會將指定值轉換為這個轉換子的型別。Converts the given value to the type of this converter.

(Inherited from TypeConverter)
ConvertFromInvariantString(ITypeDescriptorContext, String) ConvertFromInvariantString(ITypeDescriptorContext, String) ConvertFromInvariantString(ITypeDescriptorContext, String) ConvertFromInvariantString(ITypeDescriptorContext, String)

會使用不區分的文化特性和指定的內容,將指定的字串轉換為這個轉換子的型別。Converts the given string to the type of this converter, using the invariant culture and the specified context.

(Inherited from TypeConverter)
ConvertFromInvariantString(String) ConvertFromInvariantString(String) ConvertFromInvariantString(String) ConvertFromInvariantString(String)

會使用不因文化特性而異,將指定字串轉換為這個轉換子的型別。Converts the given string to the type of this converter, using the invariant culture.

(Inherited from TypeConverter)
ConvertFromString(ITypeDescriptorContext, CultureInfo, String) ConvertFromString(ITypeDescriptorContext, CultureInfo, String) ConvertFromString(ITypeDescriptorContext, CultureInfo, String) ConvertFromString(ITypeDescriptorContext, CultureInfo, String)

會使用指定內容和文化特性資訊,將指定文字轉換為物件。Converts the given text to an object, using the specified context and culture information.

(Inherited from TypeConverter)
ConvertFromString(ITypeDescriptorContext, String) ConvertFromString(ITypeDescriptorContext, String) ConvertFromString(ITypeDescriptorContext, String) ConvertFromString(ITypeDescriptorContext, String)

會使用指定的內容,將指定文字轉換為物件。Converts the given text to an object, using the specified context.

(Inherited from TypeConverter)
ConvertFromString(String) ConvertFromString(String) ConvertFromString(String) ConvertFromString(String)

會將指定的文字轉換成物件。Converts the specified text to an object.

(Inherited from TypeConverter)
ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type) ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type) ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type) ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type)

使用指定的內容和文化特性資訊,將指定值物件轉換成指定類型。Converts the given value object to the specified type, using the specified context and culture information.

(Inherited from TypeConverter)
ConvertTo(Object, Type) ConvertTo(Object, Type) ConvertTo(Object, Type) ConvertTo(Object, Type)

會使用引數,將指定值物件轉換成指定型別。Converts the given value object to the specified type, using the arguments.

(Inherited from TypeConverter)
ConvertToInvariantString(ITypeDescriptorContext, Object) ConvertToInvariantString(ITypeDescriptorContext, Object) ConvertToInvariantString(ITypeDescriptorContext, Object) ConvertToInvariantString(ITypeDescriptorContext, Object)

會使用指定的內容,將指定值轉換成不因文化特性而異的字串表示。Converts the specified value to a culture-invariant string representation, using the specified context.

(Inherited from TypeConverter)
ConvertToInvariantString(Object) ConvertToInvariantString(Object) ConvertToInvariantString(Object) ConvertToInvariantString(Object)

會將指定值轉換成不因文化特性而異的字串表示。Converts the specified value to a culture-invariant string representation.

(Inherited from TypeConverter)
ConvertToString(ITypeDescriptorContext, CultureInfo, Object) ConvertToString(ITypeDescriptorContext, CultureInfo, Object) ConvertToString(ITypeDescriptorContext, CultureInfo, Object) ConvertToString(ITypeDescriptorContext, CultureInfo, Object)

會使用指定的內容和文化特性資訊,將指定值轉換為字串表示。Converts the given value to a string representation, using the specified context and culture information.

(Inherited from TypeConverter)
ConvertToString(ITypeDescriptorContext, Object) ConvertToString(ITypeDescriptorContext, Object) ConvertToString(ITypeDescriptorContext, Object) ConvertToString(ITypeDescriptorContext, Object)

會使用指定的內容,將指定值轉換為字串表示。Converts the given value to a string representation, using the given context.

(Inherited from TypeConverter)
ConvertToString(Object) ConvertToString(Object) ConvertToString(Object) ConvertToString(Object)

會將指定值轉換成字串表示。Converts the specified value to a string representation.

(Inherited from TypeConverter)
CreateInstance(IDictionary) CreateInstance(IDictionary) CreateInstance(IDictionary) CreateInstance(IDictionary)

重新建立 Object,需為物件提供一組屬性值。Re-creates an Object given a set of property values for the object.

(Inherited from TypeConverter)
CreateInstance(ITypeDescriptorContext, IDictionary) CreateInstance(ITypeDescriptorContext, IDictionary) CreateInstance(ITypeDescriptorContext, IDictionary) CreateInstance(ITypeDescriptorContext, IDictionary)

使用指定的內容,建立與這個 TypeConverter 相關聯之類型的執行個體,並為物件提供一組屬性值。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) Equals(Object) Equals(Object) Equals(Object)

判斷指定的物件是否等於目前的物件。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetConvertFromException(Object) GetConvertFromException(Object) GetConvertFromException(Object) GetConvertFromException(Object)

無法執行轉換時,會傳回要擲回的例外狀況。Returns an exception to throw when a conversion cannot be performed.

(Inherited from TypeConverter)
GetConvertToException(Object, Type) GetConvertToException(Object, Type) GetConvertToException(Object, Type) GetConvertToException(Object, Type)

無法執行轉換時,會傳回要擲回的例外狀況。Returns an exception to throw when a conversion cannot be performed.

(Inherited from TypeConverter)
GetCreateInstanceSupported() GetCreateInstanceSupported() GetCreateInstanceSupported() GetCreateInstanceSupported()

傳回值,指出在這個物件上變更值時是否需要呼叫 CreateInstance(IDictionary) 方法來建立新值。Returns whether changing a value on this object requires a call to the CreateInstance(IDictionary) method to create a new value.

(Inherited from TypeConverter)
GetCreateInstanceSupported(ITypeDescriptorContext) GetCreateInstanceSupported(ITypeDescriptorContext) GetCreateInstanceSupported(ITypeDescriptorContext) GetCreateInstanceSupported(ITypeDescriptorContext)

會使用指定的內容,傳回在這個物件上變更值是否需要呼叫 CreateInstance(IDictionary) 來建立新值。Returns whether changing a value on this object requires a call to CreateInstance(IDictionary) to create a new value, using the specified context.

(Inherited from TypeConverter)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

做為預設雜湊函式。Serves as the default hash function.

(Inherited from Object)
GetProperties(ITypeDescriptorContext, Object) GetProperties(ITypeDescriptorContext, Object) GetProperties(ITypeDescriptorContext, Object) GetProperties(ITypeDescriptorContext, Object)

會使用指定的內容,傳回由值參數所指定之陣列型別的屬性集合。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, Attribute[]) GetProperties(ITypeDescriptorContext, Object, Attribute[]) GetProperties(ITypeDescriptorContext, Object, Attribute[]) GetProperties(ITypeDescriptorContext, Object, Attribute[])

使用指定的內容和屬性 (Attribute),傳回由值參數所指定之陣列型別的屬性 (Property) 集合。Returns a collection of properties for the type of array specified by the value parameter, using the specified context and attributes.

(Inherited from TypeConverter)
GetProperties(Object) GetProperties(Object) GetProperties(Object) GetProperties(Object)

傳回由值參數所指定之陣列型別的屬性集合。Returns a collection of properties for the type of array specified by the value parameter.

(Inherited from TypeConverter)
GetPropertiesSupported() GetPropertiesSupported() GetPropertiesSupported() GetPropertiesSupported()

傳回值,指出這個物件是否支援屬性。Returns whether this object supports properties.

(Inherited from TypeConverter)
GetPropertiesSupported(ITypeDescriptorContext) GetPropertiesSupported(ITypeDescriptorContext) GetPropertiesSupported(ITypeDescriptorContext) GetPropertiesSupported(ITypeDescriptorContext)

會使用指定的內容傳回數值,表示這個物件是否支援屬性。Returns whether this object supports properties, using the specified context.

(Inherited from TypeConverter)
GetStandardValues() GetStandardValues() GetStandardValues() GetStandardValues()

從為這個型別轉換子所設計的資料型別預設內容中,會傳回標準值的集合。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) GetStandardValues(ITypeDescriptorContext) GetStandardValues(ITypeDescriptorContext) GetStandardValues(ITypeDescriptorContext)

當資料來源可取用時,取得該資料來源中的資料欄位。Gets the data fields present within the selected data source if information about them is available.

GetStandardValuesExclusive() GetStandardValuesExclusive() GetStandardValuesExclusive() GetStandardValuesExclusive()

傳回值,這個值表示從 GetStandardValues() 所傳回的標準值集合是否為獨佔清單。Returns whether the collection of standard values returned from GetStandardValues() is an exclusive list.

(Inherited from TypeConverter)
GetStandardValuesExclusive(ITypeDescriptorContext) GetStandardValuesExclusive(ITypeDescriptorContext) GetStandardValuesExclusive(ITypeDescriptorContext) GetStandardValuesExclusive(ITypeDescriptorContext)

取得值,表示 GetStandardValues() 所傳回的標準值集合是否為所有可能值的清單。Gets a value indicating whether the collection of standard values returned from GetStandardValues() is a list of all possible values.

GetStandardValuesSupported() GetStandardValuesSupported() GetStandardValuesSupported() GetStandardValuesSupported()

會傳回這個物件是否支援可以從清單中挑選的標準值組。Returns whether this object supports a standard set of values that can be picked from a list.

(Inherited from TypeConverter)
GetStandardValuesSupported(ITypeDescriptorContext) GetStandardValuesSupported(ITypeDescriptorContext) GetStandardValuesSupported(ITypeDescriptorContext) GetStandardValuesSupported(ITypeDescriptorContext)

取得值,表示這個轉換子是否支援可以從清單中選取的標準值集合。Gets a value indicating whether the converter supports a standard set of values that can be picked from a list.

GetType() GetType() GetType() GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(Inherited from Object)
IsValid(ITypeDescriptorContext, Object) IsValid(ITypeDescriptorContext, Object) IsValid(ITypeDescriptorContext, Object) IsValid(ITypeDescriptorContext, Object)

會傳回指定值物件是否對這個型別和指定的內容有效。Returns whether the given value object is valid for this type and for the specified context.

(Inherited from TypeConverter)
IsValid(Object) IsValid(Object) IsValid(Object) IsValid(Object)

會傳回指定值物件是否對這個型別有效。Returns whether the given value object is valid for this type.

(Inherited from TypeConverter)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

建立目前 Object 的淺層複本 (Shallow Copy)。Creates a shallow copy of the current Object.

(Inherited from Object)
SortProperties(PropertyDescriptorCollection, String[]) SortProperties(PropertyDescriptorCollection, String[]) SortProperties(PropertyDescriptorCollection, String[]) SortProperties(PropertyDescriptorCollection, String[])

排序屬性的集合。Sorts a collection of properties.

(Inherited from TypeConverter)
ToString() ToString() ToString() ToString()

傳回代表目前物件的字串。Returns a string that represents the current object.

(Inherited from Object)

適用於