MulticastDelegate クラス
アセンブリ: mscorlib (mscorlib.dll 内)

<SerializableAttribute> _ <ComVisibleAttribute(True)> _ Public MustInherit Class MulticastDelegate Inherits Delegate
[SerializableAttribute] [ComVisibleAttribute(true)] public abstract class MulticastDelegate : Delegate
[SerializableAttribute] [ComVisibleAttribute(true)] public ref class MulticastDelegate abstract : public Delegate

MulticastDelegate は特殊なクラスです。コンパイラおよびその他のツールはこのクラスから派生させることができますが、明示的に派生させることはできません。これは Delegate クラスにも当てはまります。
MulticastDelegate には、複数の関連するデリゲートをまとめたリストがあり、このリストは呼び出しリストと呼ばれ、1 つ以上の要素で構成されます。マルチキャスト デリゲートが呼び出されると、同時に呼び出しリストのデリゲートが出現順に呼び出されます。呼び出しリストの実行中にエラーが発生すると、例外がスローされます。

MulticastDelegate から派生したクラスを使用する例を次に示します。
Imports System Imports Microsoft.VisualBasic ' This class contains strings. It has a member method that ' accepts a multicast delegate as a parameter and calls it Class HoldsStrings ' The following line causes the compiler to generate ' a new delegate class named CheckAndPrintDelegate that ' inherits from System.MulticastDelegate. Delegate Sub CheckAndPrintDelegate(ByVal str As String) ' An ArrayList that holds strings Private myStringArray As New System.Collections.ArrayList() Public Sub addstring(ByVal str As String) myStringArray.Add(str) End Sub 'addstring ' Iterate through the strings and invoke the method(s) that the delegate points to Public Sub PrintAllQualified(ByVal myDelegate As CheckAndPrintDelegate) Dim str As String For Each str In myStringArray myDelegate(str) Next str End Sub 'PrintAllQualified End Class 'end of class HoldsStrings ' This class contains a few sample methods Class StringFuncs ' This method prints a string that it is passed if the string starts with a vowel Public Shared Sub ConStart(ByVal str As String) If Not (str.Chars(0) = "a"c Or str.Chars(0) = "e"c Or str.Chars(0) = "i"c Or str.Chars(0) = "o"c Or str.Chars(0) = "u"c) Then Console.WriteLine(str) End If End Sub 'ConStart ' This method prints a string that it is passed if the string starts with a consonant Public Shared Sub VowelStart(ByVal str As String) If (str.Chars(0) = "a"c Or str.Chars(0) = "e"c Or str.Chars(0) = "i"c Or str.Chars(0) = "o"c Or str.Chars(0) = "u"c) Then Console.WriteLine(str) End If End Sub 'VowelStart End Class 'StringFuncs ' This class demonstrates using Delegates, including using the Remove and ' Combine methods to create and modify delegate combinations. Class Test Public Shared Sub Main() ' Declare the HoldsStrings class and add some strings Dim myHoldsStrings As New HoldsStrings() myHoldsStrings.addstring("this") myHoldsStrings.addstring("is") myHoldsStrings.addstring("a") myHoldsStrings.addstring("multicast") myHoldsStrings.addstring("delegate") myHoldsStrings.addstring("example") ' Create two delegates individually using different methods Dim ConStartDel = New HoldsStrings.CheckAndPrintDelegate(AddressOf StringFuncs.ConStart) Dim VowStartDel As New HoldsStrings.CheckAndPrintDelegate(AddressOf StringFuncs.VowelStart) ' Demonstrate that MulticastDelegates may store only one delegate Dim DelegateList() As [Delegate] ' Returns an array of all delegates stored in the linked list of the ' MulticastDelegate. In these cases the lists will hold only one (Multicast) delegate DelegateList = ConStartDel.GetInvocationList() Console.WriteLine("ConStartDel contains " + DelegateList.Length.ToString() + " delegate(s).") DelegateList = VowStartDel.GetInvocationList() Console.WriteLine(("ConStartVow contains " + DelegateList.Length.ToString() + " delegate(s).")) ' Determine whether the delegates are System.Multicast delegates If TypeOf ConStartDel Is System.MulticastDelegate And TypeOf VowStartDel Is System.MulticastDelegate Then Console.WriteLine("ConStartDel and ConStartVow are System.MulticastDelegates") End If ' Run the two single delegates one after the other Console.WriteLine("Running ConStartDel delegate:") myHoldsStrings.PrintAllQualified(ConStartDel) Console.WriteLine("Running VowStartDel delegate:") myHoldsStrings.PrintAllQualified(VowStartDel) ' Create a new, empty MulticastDelegate Dim MultiDel As HoldsStrings.CheckAndPrintDelegate ' Delegate.Combine receives an unspecified number of MulticastDelegates as parameters MultiDel = CType([Delegate].Combine(ConStartDel, VowStartDel), HoldsStrings.CheckAndPrintDelegate) ' How many delegates is this delegate holding? DelegateList = MultiDel.GetInvocationList() Console.WriteLine((ControlChars.Cr + "MulitDel contains " + DelegateList.Length.ToString() + " delegates.")) ' What happens when this mulitcast delegate is passed to PrintAllQualified Console.WriteLine("Running the multiple delegate that combined the first two") myHoldsStrings.PrintAllQualified(MultiDel) ' The Remove and Combine methods modify the multiple delegate MultiDel = CType([Delegate].Remove(MultiDel, VowStartDel), HoldsStrings.CheckAndPrintDelegate) MultiDel = CType([Delegate].Combine(MultiDel, ConStartDel), HoldsStrings.CheckAndPrintDelegate) ' Finally, pass the combined delegates to PrintAllQualified again Console.WriteLine(ControlChars.Cr + "Running the multiple delegate that contains two copies of ConStartDel:") myHoldsStrings.PrintAllQualified(MultiDel) Return End Sub 'end of main End Class 'end of Test
using System; // This class contains strings. It has a member method that // accepts a multicast delegate as a parameter and calls it. class HoldsStrings { // The following line causes the compiler to generate // a new delegate class named CheckAndPrintDelegate that // inherits from System.MulticastDelegate. public delegate void CheckAndPrintDelegate(string str); // An ArrayList that holds strings private System.Collections.ArrayList myStringArray = new System.Collections.ArrayList(); // A method that adds more strings to the Collection public void addstring( string str) { myStringArray.Add(str); } // Iterate through the strings and invoke the method(s) that the delegate points to public void PrintAllQualified(CheckAndPrintDelegate myDelegate) { foreach (string str in myStringArray) { myDelegate(str); } } } //end of class HoldsStrings // This class contains a few sample methods class StringFuncs { // This method prints a string that it is passed if the string starts with a vowel public static void ConStart(string str) { if (!(str[0]=='a'||str[0]=='e'||str[0]=='i'||str[0]=='o'||str[0]=='u')) Console.WriteLine(str); } // This method prints a string that it is passed if the string starts with a consonant public static void VowelStart(string str) { if ((str[0]=='a'||str[0]=='e'||str[0]=='i'||str[0]=='o'||str[0]=='u')) Console.WriteLine(str); } } // This class demonstrates using Delegates, including using the Remove and // Combine methods to create and modify delegate combinations. class Test { static public void Main() { // Declare the HoldsStrings class and add some strings HoldsStrings myHoldsStrings = new HoldsStrings(); myHoldsStrings.addstring("This"); myHoldsStrings.addstring("is"); myHoldsStrings.addstring("a"); myHoldsStrings.addstring("multicast"); myHoldsStrings.addstring("delegate"); myHoldsStrings.addstring("example"); // Create two delegates individually using different methods HoldsStrings.CheckAndPrintDelegate ConStartDel = new HoldsStrings.CheckAndPrintDelegate(StringFuncs.ConStart); HoldsStrings.CheckAndPrintDelegate VowStartDel = new HoldsStrings.CheckAndPrintDelegate(StringFuncs.VowelStart); // Demonstrate that MulticastDelegates may store only one delegate Delegate [] DelegateList; // Returns an array of all delegates stored in the linked list of the // MulticastDelegate. In these cases the lists will hold only one (Multicast) delegate DelegateList = ConStartDel.GetInvocationList(); Console.WriteLine("ConStartDel contains " + DelegateList.Length + " delegate(s)."); DelegateList = VowStartDel.GetInvocationList(); Console.WriteLine("ConStartVow contains " + DelegateList.Length + " delegate(s)."); // Determine whether the delegates are System.Multicast delegates // if (ConStartDel is System.MulticastDelegate && VowStartDel is System.MulticastDelegate) { Console.WriteLine("ConStartDel and ConStartVow are System.MulticastDelegates"); // } // Run the two single delegates one after the other Console.WriteLine("Running ConStartDel delegate:"); myHoldsStrings.PrintAllQualified(ConStartDel); Console.WriteLine("Running VowStartDel delegate:"); myHoldsStrings.PrintAllQualified(VowStartDel); // Create a new, empty MulticastDelegate HoldsStrings.CheckAndPrintDelegate MultiDel; // Delegate.Combine receives an unspecified number of MulticastDelegates as parameters MultiDel = (HoldsStrings.CheckAndPrintDelegate) Delegate.Combine(ConStartDel, VowStartDel); // How many delegates is this delegate holding? DelegateList = MultiDel.GetInvocationList(); Console.WriteLine("\nMulitDel contains " + DelegateList.Length + " delegates."); // What happens when this mulitcast delegate is passed to PrintAllQualified Console.WriteLine("Running the multiple delegate that combined the first two"); myHoldsStrings.PrintAllQualified(MultiDel); // The Remove and Combine methods modify the multiple delegate MultiDel = (HoldsStrings.CheckAndPrintDelegate) Delegate.Remove(MultiDel, VowStartDel); MultiDel = (HoldsStrings.CheckAndPrintDelegate) Delegate.Combine(MultiDel, ConStartDel); // Finally, pass the combined delegates to PrintAllQualified again Console.WriteLine("\nRunning the multiple delegate that contains two copies of ConStartDel:"); myHoldsStrings.PrintAllQualified(MultiDel); return; } //end of main } //end of Test
using namespace System; // This class contains strings. It has a member method that // accepts a multicast delegate as a parameter and calls it. ref class HoldsStrings { public: // The following line causes the compiler to generate // a new delegate class named CheckAndPrintDelegate that // inherits from System.MulticastDelegate. delegate void CheckAndPrintDelegate( String^ str ); private: // An ArrayList that holds strings System::Collections::ArrayList^ myStringArray; public: HoldsStrings() { myStringArray = gcnew System::Collections::ArrayList; } // A method that adds more strings to the Collection void addstring( String^ str ) { myStringArray->Add( str ); } // Iterate through the strings and invoke the method(s) that the delegate points to void PrintAllQualified( CheckAndPrintDelegate^ myDelegate ) { System::Collections::IEnumerator^ myEnum = myStringArray->GetEnumerator(); while ( myEnum->MoveNext() ) { String^ str = safe_cast<String^>(myEnum->Current); myDelegate( str ); } } }; //end of class HoldsStrings // This class contains a few sample methods ref class StringFuncs { public: // This method prints a String* that it is passed if the String* starts with a vowel static void ConStart( String^ str ) { if ( !(str[ 0 ] == 'a' || str[ 0 ] == 'e' || str[ 0 ] == 'i' || str[ 0 ] == 'o' || str[ 0 ] == 'u') ) Console::WriteLine( str ); } // This method prints a String* that it is passed if the String* starts with a consonant static void VowelStart( String^ str ) { if ( (str[ 0 ] == 'a' || str[ 0 ] == 'e' || str[ 0 ] == 'i' || str[ 0 ] == 'o' || str[ 0 ] == 'u') ) Console::WriteLine( str ); } }; // This function demonstrates using Delegates, including using the Remove and // Combine methods to create and modify delegate combinations. int main() { // Declare the HoldsStrings class and add some strings HoldsStrings^ myHoldsStrings = gcnew HoldsStrings; myHoldsStrings->addstring( "This" ); myHoldsStrings->addstring( "is" ); myHoldsStrings->addstring( "a" ); myHoldsStrings->addstring( "multicast" ); myHoldsStrings->addstring( "delegate" ); myHoldsStrings->addstring( "example" ); // Create two delegates individually using different methods HoldsStrings::CheckAndPrintDelegate^ ConStartDel = gcnew HoldsStrings::CheckAndPrintDelegate( StringFuncs::ConStart ); HoldsStrings::CheckAndPrintDelegate^ VowStartDel = gcnew HoldsStrings::CheckAndPrintDelegate( StringFuncs::VowelStart ); // Demonstrate that MulticastDelegates may store only one delegate array<Delegate^>^DelegateList; // Returns an array of all delegates stored in the linked list of the // MulticastDelegate. In these cases the lists will hold only one (Multicast) delegate DelegateList = ConStartDel->GetInvocationList(); Console::WriteLine( "ConStartDel contains {0} delegate(s).", DelegateList->Length ); DelegateList = VowStartDel->GetInvocationList(); Console::WriteLine( "ConStartVow contains {0} delegate(s).", DelegateList->Length ); // Determine whether the delegates are System::Multicast delegates if ( dynamic_cast<System::MulticastDelegate^>(ConStartDel) && dynamic_cast<System::MulticastDelegate^>(VowStartDel) ) { Console::WriteLine( "ConStartDel and ConStartVow are System::MulticastDelegates" ); } // Run the two single delegates one after the other Console::WriteLine( "Running ConStartDel delegate:" ); myHoldsStrings->PrintAllQualified( ConStartDel ); Console::WriteLine( "Running VowStartDel delegate:" ); myHoldsStrings->PrintAllQualified( VowStartDel ); // Create a new, empty MulticastDelegate HoldsStrings::CheckAndPrintDelegate^ MultiDel; // Delegate::Combine receives an unspecified number of MulticastDelegates as parameters MultiDel = dynamic_cast<HoldsStrings::CheckAndPrintDelegate^>(Delegate::Combine( ConStartDel, VowStartDel )); // How many delegates is this delegate holding? DelegateList = MultiDel->GetInvocationList(); Console::WriteLine( "\nMulitDel contains {0} delegates.", DelegateList->Length ); // What happens when this mulitcast delegate is passed to PrintAllQualified Console::WriteLine( "Running the multiple delegate that combined the first two" ); myHoldsStrings->PrintAllQualified( MultiDel ); // The Remove and Combine methods modify the multiple delegate MultiDel = dynamic_cast<HoldsStrings::CheckAndPrintDelegate^>(Delegate::Remove( MultiDel, VowStartDel )); MultiDel = dynamic_cast<HoldsStrings::CheckAndPrintDelegate^>(Delegate::Combine( MultiDel, ConStartDel )); // Finally, pass the combined delegates to PrintAllQualified again Console::WriteLine( "\nRunning the multiple delegate that contains two copies of ConStartDel:" ); myHoldsStrings->PrintAllQualified( MultiDel ); } //end of main
import System.*; // This class contains strings. It has a member method that // accepts a multicast delegate as a parameter and calls it. class HoldsStrings { /** @delegate */ // This delegate is declared as a void, so the compiler automatically // generates a new class, named CheckAndPrintDelegate, that inherits from // System.MulticastDelegate. public delegate void CheckAndPrintDelegate(String str); // An ArrayList that holds strings private System.Collections.ArrayList myStringArray = new System.Collections.ArrayList(); // A method that adds more strings to the Collection public void addstring(String str) { myStringArray.Add(str); } //addstring // Iterate through the strings and invoke the method(s) that the delegate // points to public void PrintAllQualified(CheckAndPrintDelegate myDelegate) { for (int iCtr1 = 0; iCtr1 < myStringArray.get_Count(); iCtr1++) { String str = System.Convert.ToString(myStringArray.get_Item(iCtr1)); myDelegate.Invoke(str); } } //PrintAllQualified } //HoldsStrings //end of class HoldsStrings // This class contains a few sample methods class StringFuncs { // This method prints a string that it is passed if the string starts // with a vowel public static void ConStart(String str) { if (!(str.get_Chars(0) == 'a' || str.get_Chars(0) == 'e' || str.get_Chars(0) == 'i' || str.get_Chars(0) == 'o' || str.get_Chars(0) == 'u')) { Console.WriteLine(str); } } //ConStart // This method prints a string that it is passed if the string starts with // a consonant public static void VowelStart(String str) { if (str.get_Chars(0) == 'a' || str.get_Chars(0) == 'e' || str.get_Chars(0) == 'i' || str.get_Chars(0) == 'o' || str.get_Chars(0) == 'u') { Console.WriteLine(str); } } //VowelStart } //StringFuncs // This class demonstrates using Delegates, including using the Remove and // Combine methods to create and modify delegate combinations. class Test { public static void main(String[] args) { // Declare the HoldsStrings class and add some strings HoldsStrings myHoldsStrings = new HoldsStrings(); myHoldsStrings.addstring("This"); myHoldsStrings.addstring("is"); myHoldsStrings.addstring("a"); myHoldsStrings.addstring("multicast"); myHoldsStrings.addstring("delegate"); myHoldsStrings.addstring("example"); // Create two delegates individually using different methods HoldsStrings.CheckAndPrintDelegate ConStartDel = new HoldsStrings.CheckAndPrintDelegate(StringFuncs.ConStart); HoldsStrings.CheckAndPrintDelegate VowStartDel = new HoldsStrings.CheckAndPrintDelegate(StringFuncs.VowelStart); // Demonstrate that MulticastDelegates may store only one delegate Delegate DelegateList[]; // Returns an array of all delegates stored in the linked list of the // MulticastDelegate. In these cases the lists will hold only one // (Multicast) delegate DelegateList = ConStartDel.GetInvocationList(); Console.WriteLine("ConStartDel contains " + DelegateList.get_Length() + " delegate(s)."); DelegateList = VowStartDel.GetInvocationList(); Console.WriteLine("ConStartVow contains " + DelegateList.get_Length() + " delegate(s)."); // Determine whether the delegates are System.Multicast delegates // if (ConStartDel is System.MulticastDelegate && VowStartDel is // System.MulticastDelegate) { Console.WriteLine("ConStartDel and ConStartVow are " + "System.MulticastDelegates"); // } // Run the two single delegates one after the other Console.WriteLine("Running ConStartDel delegate:"); myHoldsStrings.PrintAllQualified(ConStartDel); Console.WriteLine("Running VowStartDel delegate:"); myHoldsStrings.PrintAllQualified(VowStartDel); // Create a new, empty MulticastDelegate HoldsStrings.CheckAndPrintDelegate multiDel; // Delegate.Combine receives an unspecified number of MulticastDelegates // as parameters multiDel = (HoldsStrings.CheckAndPrintDelegate)(Delegate.Combine( ConStartDel, VowStartDel)); // How many delegates is this delegate holding? DelegateList = multiDel.GetInvocationList(); Console.WriteLine("\nMulitDel contains " + DelegateList.get_Length() + " delegates."); // What happens when this mulitcast delegate is passed to // PrintAllQualified Console.WriteLine("Running the multiple delegate that combined the " + "first two"); myHoldsStrings.PrintAllQualified(multiDel); // The Remove and Combine methods modify the multiple delegate multiDel = (HoldsStrings.CheckAndPrintDelegate)(Delegate.Remove( multiDel, VowStartDel)); multiDel = (HoldsStrings.CheckAndPrintDelegate)(Delegate.Combine( multiDel, ConStartDel)); // Finally, pass the combined delegates to PrintAllQualified again Console.WriteLine("\nRunning the multiple delegate that contains two " + "copies of ConStartDel:"); myHoldsStrings.PrintAllQualified(multiDel); return; } //main } //Test



Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


MulticastDelegate コンストラクタ ()
アセンブリ: mscorlib (mscorlib.dll 内)


Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


MulticastDelegate コンストラクタ (Type, String)
アセンブリ: mscorlib (mscorlib.dll 内)





Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


MulticastDelegate コンストラクタ

名前 | 説明 |
---|---|
MulticastDelegate () | .NET Compact Framework によってサポートされています。 |
MulticastDelegate (Object, String) | MulticastDelegate クラスの新しいインスタンスを初期化します。 |
MulticastDelegate (Type, String) | MulticastDelegate クラスの新しいインスタンスを初期化します。 |

MulticastDelegate コンストラクタ (Object, String)
アセンブリ: mscorlib (mscorlib.dll 内)





Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


MulticastDelegate プロパティ

名前 | 説明 | |
---|---|---|
![]() | Method | デリゲートによって表されるメソッドを取得します。 ( Delegate から継承されます。) |
![]() | Target | 現在のデリゲートがインスタンス メソッドを呼び出す対象のクラス インスタンスを取得します。 ( Delegate から継承されます。) |

MulticastDelegate メソッド


名前 | 説明 | |
---|---|---|
![]() | CombineImpl | オーバーライドされます。 新しいデリゲートを生成するために、指定した Delegate とこの Delegate を組み合わせます。 |
![]() | DynamicInvokeImpl | 現在のデリゲートが表すメソッドを動的に呼び出します (遅延バインディング)。 ( Delegate から継承されます。) |
![]() | Finalize | Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 ( Object から継承されます。) |
![]() | GetMethodImpl | オーバーライドされます。 現在の MulticastDelegate が表す静的メソッドを返します。 |
![]() | MemberwiseClone | 現在の Object の簡易コピーを作成します。 ( Object から継承されます。) |
![]() | RemoveImpl | オーバーライドされます。 対象の MulticastDelegate の呼び出しリストから、指定したデリゲートと等しい要素を削除します。 |

MulticastDelegate メンバ
マルチキャスト デリゲート、つまり呼び出しリストに複数の要素を組み込むことができるデリゲートを表します。
MulticastDelegate データ型で公開されるメンバを以下の表に示します。


名前 | 説明 | |
---|---|---|
![]() | Method | デリゲートによって表されるメソッドを取得します。(Delegate から継承されます。) |
![]() | Target | 現在のデリゲートがインスタンス メソッドを呼び出す対象のクラス インスタンスを取得します。(Delegate から継承されます。) |


名前 | 説明 | |
---|---|---|
![]() | CombineImpl | オーバーライドされます。 新しいデリゲートを生成するために、指定した Delegate とこの Delegate を組み合わせます。 |
![]() | DynamicInvokeImpl | 現在のデリゲートが表すメソッドを動的に呼び出します (遅延バインディング)。 (Delegate から継承されます。) |
![]() | Finalize | Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 (Object から継承されます。) |
![]() | GetMethodImpl | オーバーライドされます。 現在の MulticastDelegate が表す静的メソッドを返します。 |
![]() | MemberwiseClone | 現在の Object の簡易コピーを作成します。 (Object から継承されます。) |
![]() | RemoveImpl | オーバーライドされます。 対象の MulticastDelegate の呼び出しリストから、指定したデリゲートと等しい要素を削除します。 |

Weblioに収録されているすべての辞書からMulticastDelegateを検索する場合は、下記のリンクをクリックしてください。

- MulticastDelegateのページへのリンク