PropertyAttributes 列挙型
定義
重要
一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。
プロパティーに関連付けることができる属性を定義します。 これらの属性値は、corhdr.h で定義されます。
この列挙体は、メンバー値のビットごとの組み合わせをサポートしています。
public enum class PropertyAttributes[System.Flags]
public enum PropertyAttributes[System.Flags]
[System.Serializable]
public enum PropertyAttributes[System.Flags]
[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public enum PropertyAttributes[<System.Flags>]
type PropertyAttributes = [<System.Flags>]
[<System.Serializable>]
type PropertyAttributes = [<System.Flags>]
[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type PropertyAttributes = Public Enum PropertyAttributes- 継承
- 属性
フィールド
| HasDefault | 4096 | プロパティが既定値を持つことを指定します。 |
| None | 0 | プロパティに関連付ける属性がないことを指定します。 |
| Reserved2 | 8192 | 予約済み。 |
| Reserved3 | 16384 | 予約済み。 |
| Reserved4 | 32768 | 予約済み。 |
| ReservedMask | 62464 | ランタイム専用に予約されているフラグを指定します。 |
| RTSpecialName | 1024 | メタデータ内部 API が名前のエンコーディングを確認することを指定します。 |
| SpecialName | 512 | プロパティが特別であることを指定します。プロパティが特別である理由は名前で説明します。 |
例
次の例では、3 つのプロパティをビルドし、列挙値を PropertyAttributes 表示します。 読み取り専用プロパティにはセッターがないため、 で変更できないことに注意してくださいCaption = statement。
using namespace System;
using namespace System::Reflection;
// Define three properties: one read-write, one default,
// and one read only.
// Define a read-write property.
public ref class Aproperty
{
private:
String^ caption;
public:
Aproperty()
: caption( "A Default caption" )
{}
property String^ Caption
{
String^ get()
{
return caption;
}
void set( String^ value )
{
if ( caption != value )
{
caption = value;
}
}
}
};
// Define a default property.
public ref class Bproperty
{
private:
String^ caption;
public:
Bproperty()
: caption( "B Default caption" )
{}
public:
property String^ Item
{
String^ get()
{
return "1";
}
}
property String^ Caption
{
String^ get()
{
return caption;
}
void set( String^ value )
{
if ( caption != value )
{
caption = value;
}
}
}
};
// Define a read-only property.
public ref class Cproperty
{
private:
String^ caption;
public:
Cproperty()
: caption( "C Default caption" )
{}
property String^ Caption
{
String^ get()
{
return caption;
}
}
};
int main()
{
Console::WriteLine( "\nReflection.PropertyAttributes" );
// Determine whether a property exists, and change its value.
Aproperty^ Mypropertya = gcnew Aproperty;
Bproperty^ Mypropertyb = gcnew Bproperty;
Cproperty^ Mypropertyc = gcnew Cproperty;
Console::Write( "\n1. Mypropertya->Caption = {0}", Mypropertya->Caption );
Console::Write( "\n1. Mypropertyb->Caption = {0}", Mypropertyb->Caption );
Console::Write( "\n1. Mypropertyc->Caption = {0}", Mypropertyc->Caption );
// Only Mypropertya can be changed, as Mypropertyb is read-only.
Mypropertya->Caption = "A- This is changed.";
Mypropertyb->Caption = "B- This is changed.";
// Note that Mypropertyc is not changed because it is read only
Console::Write( "\n\n2. Mypropertya->Caption = {0}", Mypropertya->Caption );
Console::Write( "\n2. Mypropertyb->Caption = {0}", Mypropertyb->Caption );
Console::Write( "\n2. Mypropertyc->Caption = {0}", Mypropertyc->Caption );
// Get the PropertyAttributes enumeration of the property.
// Get the type.
Type^ MyTypea = Type::GetType( "Aproperty" );
Type^ MyTypeb = Type::GetType( "Bproperty" );
Type^ MyTypec = Type::GetType( "Cproperty" );
// Get the property attributes.
PropertyInfo^ Mypropertyinfoa = MyTypea->GetProperty( "Caption" );
PropertyAttributes Myattributesa = Mypropertyinfoa->Attributes;
PropertyInfo^ Mypropertyinfob = MyTypeb->GetProperty( "Item" );
PropertyAttributes Myattributesb = Mypropertyinfob->Attributes;
PropertyInfo^ Mypropertyinfoc = MyTypec->GetProperty( "Caption" );
PropertyAttributes Myattributesc = Mypropertyinfoc->Attributes;
// Display the property attributes value.
Console::Write( "\n\na- {0}", Myattributesa );
Console::Write( "\nb- {0}", Myattributesb );
Console::Write( "\nc- {0}", Myattributesc );
return 0;
}
// This example displays the following output to the console
//
// Reflection.PropertyAttributes
//
// 1. Mypropertya.Caption = A Default caption
// 1. Mypropertyb.Caption = B Default caption
// 1. Mypropertyc.Caption = C Default caption
//
// 2. Mypropertya.Caption = A- This is changed.
// 2. Mypropertyb.Caption = B- This is changed.
// 2. Mypropertyc.Caption = C Default caption
//
// a- None
// b- None
// c- None
using System;
using System.Reflection;
// Define three properties: one read-write, one default,
// and one read only.
public class Aproperty
// Define a read-write property.
{
private string caption = "A Default caption";
public string Caption
{
get{return caption;}
set
{
if (caption != value){caption = value;}
}
}
}
public class Bproperty
// Define a default property.
{
private string caption = "B Default caption";
public string this [int index]
{
get {return "1";}
}
public string Caption
{
get{return caption;}
set
{
if (caption != value){caption = value;}
}
}
}
public class Cproperty
// Define a read-only property.
{
private string caption = "C Default caption";
public string Caption
{
get{return caption;}
// No setting is allowed, because this is a read-only property.
}
}
class propertyattributesenum
{
public static int Main(string[] args)
{
Console.WriteLine("\nReflection.PropertyAttributes");
// Determine whether a property exists, and change its value.
Aproperty Mypropertya = new Aproperty();
Bproperty Mypropertyb = new Bproperty();
Cproperty Mypropertyc = new Cproperty();
Console.Write("\n1. Mypropertya.Caption = " + Mypropertya.Caption );
Console.Write("\n1. Mypropertyb.Caption = " + Mypropertyb.Caption );
Console.Write("\n1. Mypropertyc.Caption = " + Mypropertyc.Caption );
// Only Mypropertya can be changed, as Mypropertyb is read-only.
Mypropertya.Caption = "A- This is changed.";
Mypropertyb.Caption = "B- This is changed.";
// Note that Mypropertyc is not changed because it is read only
Console.Write("\n\n2. Mypropertya.Caption = " + Mypropertya.Caption );
Console.Write("\n2. Mypropertyb.Caption = " + Mypropertyb.Caption );
Console.Write("\n2. Mypropertyc.Caption = " + Mypropertyc.Caption );
// Get the PropertyAttributes enumeration of the property.
// Get the type.
Type MyTypea = Type.GetType("Aproperty");
Type MyTypeb = Type.GetType("Bproperty");
Type MyTypec = Type.GetType("Cproperty");
// Get the property attributes.
PropertyInfo Mypropertyinfoa = MyTypea.GetProperty("Caption");
PropertyAttributes Myattributesa = Mypropertyinfoa.Attributes;
PropertyInfo Mypropertyinfob = MyTypeb.GetProperty("Item");
PropertyAttributes Myattributesb = Mypropertyinfob.Attributes;
PropertyInfo Mypropertyinfoc = MyTypec.GetProperty("Caption");
PropertyAttributes Myattributesc = Mypropertyinfoc.Attributes;
// Display the property attributes value.
Console.Write("\n\na- " + Myattributesa.ToString());
Console.Write("\nb- " + Myattributesb.ToString());
Console.Write("\nc- " + Myattributesc.ToString());
return 0;
}
}
// This example displays the following output to the console
//
// Reflection.PropertyAttributes
//
// 1. Mypropertya.Caption = A Default caption
// 1. Mypropertyb.Caption = B Default caption
// 1. Mypropertyc.Caption = C Default caption
//
// 2. Mypropertya.Caption = A- This is changed.
// 2. Mypropertyb.Caption = B- This is changed.
// 2. Mypropertyc.Caption = C Default caption
//
// a- None
// b- None
// c- None
Imports System.Reflection
' Make three properties, one read-write, one default,
' and one read-only.
Public Class Aproperty
' Define a read-write property.
Private myCaption As String = "A Default caption"
Public Property Caption() As String
Get
Return myCaption
End Get
Set(ByVal Value As String)
If myCaption <> value Then
myCaption = value
End If
End Set
End Property
End Class
Public Class Bproperty
' Define a default property.
Private myCaption As String = "B Default caption"
Default Public ReadOnly Property Item(ByVal index As Integer) As String
Get
Return "1"
End Get
End Property
Public Property Caption() As String
Get
Return myCaption
End Get
Set(ByVal Value As String)
If myCaption <> value Then
myCaption = value
End If
End Set
End Property
End Class
Public Class Cproperty
' Define a read-only property.
Private myCaption As String = "C Default caption"
Public ReadOnly Property Caption() As String
Get
Return myCaption
End Get
'No setting is allowed because this property is read-only.
End Property
End Class
Class propertyattributesenum
Public Shared Function Main() As Integer
Console.WriteLine(ControlChars.CrLf & "Reflection.PropertyAttributes")
' Determine whether a property exists, and change its value.
Dim Mypropertya As New Aproperty()
Dim Mypropertyb As New Bproperty()
Dim Mypropertyc As New Cproperty()
Console.Write(ControlChars.CrLf & "1. Mypropertya.Caption = " & _
Mypropertya.Caption)
Console.Write(ControlChars.CrLf & "1. Mypropertyb.Caption = " & _
Mypropertyb.Caption)
Console.Write(ControlChars.CrLf & "1. Mypropertyc.Caption = " & _
Mypropertyc.Caption)
' Only Mypropertya can be changed because Mypropertyb is read-only.
Mypropertya.Caption = "A- This is changed."
Mypropertyb.Caption = "B- This is changed."
' Note that Mypropertyc is not changed, because it is read-only.
Console.Write(ControlChars.CrLf & ControlChars.CrLf & _
"2. Mypropertya.Caption = " & Mypropertya.Caption)
Console.Write(ControlChars.CrLf & "2. Mypropertyb.Caption = " & _
Mypropertyb.Caption)
Console.Write(ControlChars.CrLf + "2. Mypropertyc.Caption = " & _
Mypropertyc.Caption)
' Get the PropertyAttributes Enumeration of the property.
' Get the type.
Dim MyTypea As Type = Type.GetType("Aproperty")
Dim MyTypeb As Type = Type.GetType("Bproperty")
Dim MyTypec As Type = Type.GetType("Cproperty")
' Get the property attributes.
Dim Mypropertyinfoa As PropertyInfo = MyTypea.GetProperty("Caption")
Dim Myattributesa As PropertyAttributes = Mypropertyinfoa.Attributes
Dim Mypropertyinfob As PropertyInfo = MyTypeb.GetProperty("Item")
Dim Myattributesb As PropertyAttributes = Mypropertyinfob.Attributes
Dim Mypropertyinfoc As PropertyInfo = MyTypec.GetProperty("Caption")
Dim Myattributesc As PropertyAttributes = Mypropertyinfoc.Attributes
' Display the property attributes value.
Console.Write(ControlChars.CrLf & ControlChars.CrLf & "a- " & _
Myattributesa.ToString())
Console.Write(ControlChars.CrLf & "b- " & Myattributesb.ToString())
Console.Write(ControlChars.CrLf & "c- " & Myattributesc.ToString())
Return 0
End Function' End Function
End Class
' This example displays the following output to the console
'
' Reflection.PropertyAttributes
'
' 1. Mypropertya.Caption = A Default caption
' 1. Mypropertyb.Caption = B Default caption
' 1. Mypropertyc.Caption = C Default caption
'
' 2. Mypropertya.Caption = A- This is changed.
' 2. Mypropertyb.Caption = B- This is changed.
' 2. Mypropertyc.Caption = C Default caption
'
' a- None
' b- None
' c- None
注釈
を取得するには、 PropertyAttributesまず クラス Typeを取得します。 から、 Typeを取得します PropertyInfo。 から、 PropertyInfoを取得します Attributes。
列挙値は、 メソッドに実装されている属性のビットごとの OR を表す数値です。
適用対象
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