MethodBase.GetCurrentMethod 方法

參考

定義

命名空間:: System.Reflection

組件:: System.Runtime.dll

組件:: mscorlib.dll

組件:: netstandard.dll

來源:: MethodBase.CoreCLR.cs

來源:: MethodBase.CoreCLR.cs

來源:: MethodBase.CoreCLR.cs

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

傳回代表目前執行方法的 MethodBase 物件。

public:
 static System::Reflection::MethodBase ^ GetCurrentMethod();

public static System.Reflection.MethodBase? GetCurrentMethod ();

public static System.Reflection.MethodBase GetCurrentMethod ();

static member GetCurrentMethod : unit -> System.Reflection.MethodBase

Public Shared Function GetCurrentMethod () As MethodBase

傳回

MethodBase

GetCurrentMethod() 是從執行方法中呼叫的靜態方法，並傳回關於該執行方法的資訊。

代表目前執行方法的 MethodBase 物件。

例外狀況

TargetException

這個成員曾被晚期繫結機制叫用過。

範例

下列範例會定義兩種類型。第一個是非泛型類別， TestClass包括建構函式、名為 GetValue的方法，以及名為的 GetValue讀寫屬性。第二個是名為 TestClass<T> 的泛型類別，其中包含建構函式、GetValue方法和泛型方法。 ConvertValue<Y> 每個建構函式、方法和屬性存取子都包含方法的 GetCurrentMethod 呼叫。

using System;
using System.Reflection;

public class Example
{
   public static void Main()
   {
      var t = new TestClass();  
      Console.WriteLine(t.GetValue());
      t.Value = 10;
      Console.WriteLine(t.Value);
      Console.WriteLine();
      
      var tg =new Test<int>(200);
      Console.WriteLine(tg.GetValue());
      var b = tg.ConvertValue<Byte>();
      Console.WriteLine("{0} -> {1} ({2})", tg.GetValue().GetType().Name,
                        b, b.GetType().Name);
   }
}        

public class TestClass
{
   private Nullable<int> _value;
   
   public TestClass()
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
   }
   
   public TestClass(int value)
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      _value = value;
   }
   
   public int Value
   {  
      get {
         MethodBase m = MethodBase.GetCurrentMethod();
         Console.WriteLine("Executing {0}.{1}", 
                           m.ReflectedType.Name, m.Name);
         return _value.GetValueOrDefault();
      }
      set {
         MethodBase m = MethodBase.GetCurrentMethod();
         Console.WriteLine("Executing {0}.{1}", 
                           m.ReflectedType.Name, m.Name);
         _value = value;
      }
   }
   
   public int GetValue()
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      return this.Value;
   }
}

public class Test<T>
{
   private T value;
   
   public Test(T value)
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      this.value = value;
   }
   
   public T GetValue()
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      return value;
   }
   
   public Y ConvertValue<Y>() 
   {
      MethodBase m = MethodBase.GetCurrentMethod();
      Console.WriteLine("Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name);
      Console.Write("      Generic method: {0}, definition: {1}, Args: ", 
                        m.IsGenericMethod, m.IsGenericMethodDefinition);
      if (m.IsGenericMethod) {
         foreach (var arg in m.GetGenericArguments())
            Console.Write("{0} ", arg.Name);
      }
      Console.WriteLine();
      try {
         return (Y) Convert.ChangeType(value, typeof(Y));
      }
      catch (OverflowException) {
         throw; 
      }   
      catch (InvalidCastException) {
         throw;
      }   
   }   
}
// The example displays the following output:
//       Executing TestClass..ctor
//       Executing TestClass.GetValue
//       Executing TestClass.get_Value
//       0
//       Executing TestClass.set_Value
//       Executing TestClass.get_Value
//       10
//       
//       Executing Test`1..ctor
//       Executing Test`1.GetValue
//       200
//       Executing Test`1.ConvertValue
//             Generic method: True, definition: True, Args: Y
//       Executing Test`1.GetValue
//       Int32 -> 200 (Byte)

Imports System.Reflection

Module Example
   Public Sub Main()
      Dim t As New TestClass()  
      Console.WriteLine(t.GetValue())
      t.Value = 10
      Console.WriteLine(t.Value)
      Console.WriteLine()
      
      Dim tg As New Test(Of Integer)(200)
      Console.WriteLine(tg.GetValue())
      Dim b = tg.ConvertValue(Of Byte)()
      Console.WriteLine("{0} -> {1} ({2})", tg.GetValue().GetType().Name,
                        b, b.GetType().Name)
                                            
                                             
   End Sub
End Module

Public Class TestClass
   Private _value As Nullable(Of Integer)
   
   Public Sub New()
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
   End Sub
   
   Public Sub New(value As Integer)
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      _value = value
   End Sub
   
   Public Property Value As Integer
      Get
         Dim m As MethodBase = MethodBase.GetCurrentMethod()
         Console.WriteLine("   Executing {0}.{1}", 
                           m.ReflectedType.Name, m.Name)
         Return _value.GetValueOrDefault()
      End Get
      Set
         Dim m As MethodBase = MethodBase.GetCurrentMethod()
         Console.WriteLine("   Executing {0}.{1}", 
                           m.ReflectedType.Name, m.Name)
         _value = value
      End Set
   End Property
   
   Public Function GetValue() As Integer
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      Return Me.Value
   End Function
End Class

Public Class Test(Of T)
   Private value As T
   
   Public Sub New(value As T)
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      Me.value = value
   End Sub
   
   Public Function GetValue() As T
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      Return value
   End Function
   
   Public Function ConvertValue(Of Y)() As Y
      Dim m As MethodBase = MethodBase.GetCurrentMethod()
      Console.WriteLine("   Executing {0}.{1}", 
                        m.ReflectedType.Name, m.Name)
      Console.Write("      Generic method: {0}, definition: {1}, Args: ", 
                        m.IsGenericMethod, m.IsGenericMethodDefinition)
      If m.IsGenericMethod Then
         For Each arg In m.GetGenericArguments()
            Console.Write("{0} ", arg.Name)
         Next
      End If
      Console.WriteLine()
      Try
         Return CType(Convert.ChangeType(value, GetType(Y)), Y)
      Catch e As OverflowException
         Throw 
      Catch e As InvalidCastException
         Throw
      End Try   
   End Function   
End Class
' The example displays the following output:
'       Executing TestClass..ctor
'       Executing TestClass.GetValue
'       Executing TestClass.get_Value
'       0
'       Executing TestClass.set_Value
'       Executing TestClass.get_Value
'       10
'       
'       Executing Test`1..ctor
'       Executing Test`1.GetValue
'       200
'       Executing Test`1.ConvertValue
'             Generic method: True, definition: True, Args: Y
'       Executing Test`1.GetValue
'       Int32 -> 200 (Byte)

備註

如果在泛型型別上定義目前執行的方法， MethodInfo 則會從泛型型別定義 (取得所傳 GetCurrentMethod 回的，也就是 MethodBase.ContainsGenericParameters 傳回 true) 。因此，它不會反映呼叫方法時所使用的型別自變數。例如，如果在 Visual Basic) 中的泛型型別上定義方法 M() (C(Of T)，並從 GetCurrentMethod 呼叫 C<string>.M()，則會GetCurrentMethod在 Visual Basic) 中傳回 C<T>.M() (C(Of T).M()。C<T>

如果目前執行中的方法是泛型方法，則 GetCurrentMethod 傳回泛型方法定義。如果在泛型型別上定義泛型方法，則會 MethodInfo 從泛型型別定義取得。

適用於

共用方式為

MethodBase.GetCurrentMethod 方法

定義

傳回

例外狀況

範例

備註

適用於

其他資源