Bagikan melalui

EventInfo.EventHandlerType Properti

  • Referensi

Definisi

Ruang nama:
System.Reflection
Rakitan:
System.Reflection.dll
Rakitan:
System.Runtime.dll
Rakitan:
mscorlib.dll
Rakitan:
netstandard.dll
Sumber:
EventInfo.cs
Sumber:
EventInfo.cs
Sumber:
EventInfo.cs

Mendapatkan objek dari delegasi penanganan aktivitas yang mendasar Type yang terkait dengan peristiwa ini.

public:
 virtual property Type ^ EventHandlerType { Type ^ get(); };
public:
 property Type ^ EventHandlerType { Type ^ get(); };
public virtual Type EventHandlerType { get; }
public virtual Type? EventHandlerType { get; }
public Type EventHandlerType { get; }
member this.EventHandlerType : Type
Public Overridable ReadOnly Property EventHandlerType As Type
Public ReadOnly Property EventHandlerType As Type

Nilai Properti

Type

Objek baca-saja Type yang mewakili penanganan aktivitas delegasi.

Penerapan

EventHandlerType

Pengecualian

SecurityException

Pemanggil tidak memiliki izin yang diperlukan.

Contoh

Contoh berikut menggunakan EventHandlerType properti untuk menemukan jenis delegasi peristiwa dan untuk menampilkan jenis parameternya.

Contoh mendefinisikan delegasi bernama MyDelegate dan peristiwa bernama ev jenis MyDelegate. Kode dalam Main metode menemukan tanda tangan peristiwa dengan mendapatkan jenis delegasi peristiwa, mendapatkan Invoke metode jenis delegasi, lalu mengambil dan menampilkan parameter.

// The following example uses instances of classes in
// the System::Reflection namespace to discover an event argument type.
using namespace System;
using namespace System::Reflection;

public delegate void MyDelegate( int i );
public ref class MainClass
{
public:
   event MyDelegate^ ev;
};

int main()
{
   Type^ delegateType = MainClass::typeid->GetEvent( "ev" )->EventHandlerType;
   MethodInfo^ invoke = delegateType->GetMethod( "Invoke" );
   array<ParameterInfo^>^pars = invoke->GetParameters();
   System::Collections::IEnumerator^ myEnum = pars->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      ParameterInfo^ p = safe_cast<ParameterInfo^>(myEnum->Current);
      Console::WriteLine( p->ParameterType );
   }
}
// The example displays the following output:
//       System.Int32

// The following example uses instances of classes in
// the System.Reflection namespace to discover an event argument type.
using System;
using System.Reflection;

public delegate void MyDelegate(int i);
public class MainClass
{
    public event MyDelegate ev;

    public static void Main()
    {
        Type delegateType = typeof(MainClass).GetEvent("ev").EventHandlerType;
        MethodInfo invoke = delegateType.GetMethod("Invoke");
        ParameterInfo[] pars = invoke.GetParameters();
        foreach (ParameterInfo p in pars)
        {
            Console.WriteLine(p.ParameterType);
        }
    }
}
// The example displays the following output:
//       System.Int32

Imports System.Reflection

Public Delegate Sub MyDelegate(ByVal i As Integer)

Public Class MainClass
    Public Event ev As MyDelegate

    Public Shared Sub Main()
        Dim delegateType As Type = GetType(MainClass).GetEvent("ev").EventHandlerType
        Dim invoke As MethodInfo = delegateType.GetMethod("Invoke")
        Dim pars As ParameterInfo() = invoke.GetParameters()
        For Each p As ParameterInfo In pars
            Console.WriteLine(p.ParameterType)
        Next 
    End Sub 
End Class 
' The example displays the following output:
'     System.Int32

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