Type.DeclaringMethod Özellik
Tanım
Önemli
Bazı bilgiler ürünün ön sürümüyle ilgilidir ve sürüm öncesinde önemli değişiklikler yapılmış olabilir. Burada verilen bilgilerle ilgili olarak Microsoft açık veya zımni hiçbir garanti vermez.
Geçerli Type genel bir MethodBase yöntemin tür parametresini temsil ediyorsa bildirim yöntemini temsil eden bir alır.
public:
virtual property System::Reflection::MethodBase ^ DeclaringMethod { System::Reflection::MethodBase ^ get(); };
public virtual System.Reflection.MethodBase? DeclaringMethod { get; }
public virtual System.Reflection.MethodBase DeclaringMethod { get; }
member this.DeclaringMethod : System.Reflection.MethodBase
Public Overridable ReadOnly Property DeclaringMethod As MethodBase
Özellik Değeri
Geçerli Type , genel bir yöntemin tür parametresini, bildirim yöntemini temsil eden bir MethodBase tür parametresini temsil ediyorsa, aksi takdirde , null
.
Örnekler
Aşağıdaki kod örneği, genel bir yöntemi olan bir sınıfı tanımlar, yönteme bir tür bağımsız değişkeni atar ve sonuçta elde edilen genel yöntemi çağırır. Ayrıca genel yöntem tanımı ve yapılı yöntem hakkındaki bilgileri de görüntüler. Yöntemde DisplayGenericMethodInfo
, genel yöntem tanımının tür parametreleri hakkında bilgi görüntülerken, örnek kod yöntemin DeclaringMethod genel tür parametresi için özelliğinin değerini gösterir.
using namespace System;
using namespace System::Reflection;
// Define a class with a generic method.
ref class Example
{
public:
generic<typename T> static void Generic(T toDisplay)
{
Console::WriteLine("\r\nHere it is: {0}", toDisplay);
}
};
void DisplayGenericMethodInfo(MethodInfo^ mi)
{
Console::WriteLine("\r\n{0}", mi);
Console::WriteLine("\tIs this a generic method definition? {0}",
mi->IsGenericMethodDefinition);
Console::WriteLine("\tIs it a generic method? {0}",
mi->IsGenericMethod);
Console::WriteLine("\tDoes it have unassigned generic parameters? {0}",
mi->ContainsGenericParameters);
// If this is a generic method, display its type arguments.
//
if (mi->IsGenericMethod)
{
array<Type^>^ typeArguments = mi->GetGenericArguments();
Console::WriteLine("\tList type arguments ({0}):",
typeArguments->Length);
for each (Type^ tParam in typeArguments)
{
// IsGenericParameter is true only for generic type
// parameters.
//
if (tParam->IsGenericParameter)
{
Console::WriteLine("\t\t{0} parameter position {1}" +
"\n\t\t declaring method: {2}",
tParam,
tParam->GenericParameterPosition,
tParam->DeclaringMethod);
}
else
{
Console::WriteLine("\t\t{0}", tParam);
}
}
}
};
void main()
{
Console::WriteLine("\r\n--- Examine a generic method.");
// Create a Type object representing class Example, and
// get a MethodInfo representing the generic method.
//
Type^ ex = Example::typeid;
MethodInfo^ mi = ex->GetMethod("Generic");
DisplayGenericMethodInfo(mi);
// Assign the int type to the type parameter of the Example
// method.
//
MethodInfo^ miConstructed = mi->MakeGenericMethod(int::typeid);
DisplayGenericMethodInfo(miConstructed);
// Invoke the method.
array<Object^>^ args = { 42 };
miConstructed->Invoke((Object^) 0, args);
// Invoke the method normally.
Example::Generic<int>(42);
// Get the generic type definition from the closed method,
// and show it's the same as the original definition.
//
MethodInfo^ miDef = miConstructed->GetGenericMethodDefinition();
Console::WriteLine("\r\nThe definition is the same: {0}",
miDef == mi);
};
/* This example produces the following output:
--- Examine a generic method.
Void Generic[T](T)
Is this a generic method definition? True
Is it a generic method? True
Does it have unassigned generic parameters? True
List type arguments (1):
T parameter position 0
declaring method: Void Generic[T](T)
Void Generic[Int32](Int32)
Is this a generic method definition? False
Is it a generic method? True
Does it have unassigned generic parameters? False
List type arguments (1):
System.Int32
Here it is: 42
Here it is: 42
The definition is the same: True
*/
using System;
using System.Reflection;
// Define a class with a generic method.
public class Example
{
public static void Generic<T>(T toDisplay)
{
Console.WriteLine("\r\nHere it is: {0}", toDisplay);
}
}
public class Test
{
public static void Main()
{
Console.WriteLine("\r\n--- Examine a generic method.");
// Create a Type object representing class Example, and
// get a MethodInfo representing the generic method.
//
Type ex = typeof(Example);
MethodInfo mi = ex.GetMethod("Generic");
DisplayGenericMethodInfo(mi);
// Assign the int type to the type parameter of the Example
// method.
//
MethodInfo miConstructed = mi.MakeGenericMethod(typeof(int));
DisplayGenericMethodInfo(miConstructed);
// Invoke the method.
object[] args = {42};
miConstructed.Invoke(null, args);
// Invoke the method normally.
Example.Generic<int>(42);
// Get the generic type definition from the closed method,
// and show it's the same as the original definition.
//
MethodInfo miDef = miConstructed.GetGenericMethodDefinition();
Console.WriteLine("\r\nThe definition is the same: {0}",
miDef == mi);
}
private static void DisplayGenericMethodInfo(MethodInfo mi)
{
Console.WriteLine("\r\n{0}", mi);
Console.WriteLine("\tIs this a generic method definition? {0}",
mi.IsGenericMethodDefinition);
Console.WriteLine("\tIs it a generic method? {0}",
mi.IsGenericMethod);
Console.WriteLine("\tDoes it have unassigned generic parameters? {0}",
mi.ContainsGenericParameters);
// If this is a generic method, display its type arguments.
//
if (mi.IsGenericMethod)
{
Type[] typeArguments = mi.GetGenericArguments();
Console.WriteLine("\tList type arguments ({0}):",
typeArguments.Length);
foreach (Type tParam in typeArguments)
{
// IsGenericParameter is true only for generic type
// parameters.
//
if (tParam.IsGenericParameter)
{
Console.WriteLine("\t\t{0} parameter position {1}" +
"\n\t\t declaring method: {2}",
tParam,
tParam.GenericParameterPosition,
tParam.DeclaringMethod);
}
else
{
Console.WriteLine("\t\t{0}", tParam);
}
}
}
}
}
/* This example produces the following output:
--- Examine a generic method.
Void Generic[T](T)
Is this a generic method definition? True
Is it a generic method? True
Does it have unassigned generic parameters? True
List type arguments (1):
T parameter position 0
declaring method: Void Generic[T](T)
Void Generic[Int32](Int32)
Is this a generic method definition? False
Is it a generic method? True
Does it have unassigned generic parameters? False
List type arguments (1):
System.Int32
Here it is: 42
Here it is: 42
The definition is the same: True
*/
open System.Reflection
// Define a class with a generic method.
type Example =
static member Generic<'T>(toDisplay: 'T) =
printfn $"\r\nHere it is: {toDisplay}"
let displayGenericMethodInfo (mi: MethodInfo) =
printfn $"\n{mi}"
printfn $"\tIs this a generic method definition? {mi.IsGenericMethodDefinition}"
printfn $"\tIs it a generic method? {mi.IsGenericMethod}"
printfn $"\tDoes it have unassigned generic parameters? {mi.ContainsGenericParameters}"
// If this is a generic method, display its type arguments.
//
if mi.IsGenericMethod then
let typeArguments = mi.GetGenericArguments()
printfn $"\tList type arguments ({typeArguments.Length}):"
for tParam in typeArguments do
// IsGenericParameter is true only for generic type
// parameters.
if tParam.IsGenericParameter then
printfn $"\t\t{tParam} parameter position {tParam.GenericParameterPosition}\n\t\t declaring method: {tParam.DeclaringMethod}"
else
printfn $"\t\t{tParam}"
printfn "\r\n--- Examine a generic method."
// Create a Type object representing class Example, and
// get a MethodInfo representing the generic method.
//
let ex = typeof<Example>
let mi = ex.GetMethod "Generic"
displayGenericMethodInfo mi
// Assign the int type to the type parameter of the Example
// method.
//
let miConstructed = mi.MakeGenericMethod typeof<int>
displayGenericMethodInfo miConstructed
// Invoke the method.
let args = [| box 42 |]
miConstructed.Invoke(null, args) |> ignore
// Invoke the method normally.
Example.Generic<int> 42
// Get the generic type definition from the closed method,
// and show it's the same as the original definition.
//
let miDef = miConstructed.GetGenericMethodDefinition()
printfn $"\r\nThe definition is the same: {miDef = mi}"
(* This example produces the following output:
--- Examine a generic method.
Void Generic[T](T)
Is this a generic method definition? True
Is it a generic method? True
Does it have unassigned generic parameters? True
List type arguments (1):
T parameter position 0
declaring method: Void Generic[T](T)
Void Generic[Int32](Int32)
Is this a generic method definition? False
Is it a generic method? True
Does it have unassigned generic parameters? False
List type arguments (1):
System.Int32
Here it is: 42
Here it is: 42
The definition is the same: True
*)
Imports System.Reflection
' Define a class with a generic method.
Public Class Example
Public Shared Sub Generic(Of T)(ByVal toDisplay As T)
Console.WriteLine(vbCrLf & "Here it is: {0}", toDisplay)
End Sub
End Class
Public Class Test
Public Shared Sub Main()
Console.WriteLine(vbCrLf & "--- Examine a generic method.")
' Create a Type object representing class Example, and
' get a MethodInfo representing the generic method.
'
Dim ex As Type = GetType(Example)
Dim mi As MethodInfo = ex.GetMethod("Generic")
DisplayGenericMethodInfo(mi)
' Assign the Integer type to the type parameter of the Example
' method.
'
Dim arguments() As Type = { GetType(Integer) }
Dim miConstructed As MethodInfo = mi.MakeGenericMethod(arguments)
DisplayGenericMethodInfo(miConstructed)
' Invoke the method.
Dim args() As Object = { 42 }
miConstructed.Invoke(Nothing, args)
' Invoke the method normally.
Example.Generic(Of Integer)(42)
' Get the generic type definition from the constructed method,
' and show that it's the same as the original definition.
'
Dim miDef As MethodInfo = miConstructed.GetGenericMethodDefinition()
Console.WriteLine(vbCrLf & "The definition is the same: {0}", _
miDef Is mi)
End Sub
Private Shared Sub DisplayGenericMethodInfo(ByVal mi As MethodInfo)
Console.WriteLine(vbCrLf & mi.ToString())
Console.WriteLine(vbTab _
& "Is this a generic method definition? {0}", _
mi.IsGenericMethodDefinition)
Console.WriteLine(vbTab & "Is it a generic method? {0}", _
mi.IsGenericMethod)
Console.WriteLine(vbTab _
& "Does it have unassigned generic parameters? {0}", _
mi.ContainsGenericParameters)
' If this is a generic method, display its type arguments.
'
If mi.IsGenericMethod Then
Dim typeArguments As Type() = mi.GetGenericArguments()
Console.WriteLine(vbTab & "List type arguments ({0}):", _
typeArguments.Length)
For Each tParam As Type In typeArguments
' IsGenericParameter is true only for generic type
' parameters.
'
If tParam.IsGenericParameter Then
Console.WriteLine(vbTab & vbTab _
& "{0} parameter position: {1}" _
& vbCrLf & vbTab & vbTab _
& " declaring method: {2}", _
tParam, _
tParam.GenericParameterPosition, _
tParam.DeclaringMethod)
Else
Console.WriteLine(vbTab & vbTab & tParam.ToString())
End If
Next tParam
End If
End Sub
End Class
' This example produces the following output:
'
'--- Examine a generic method.
'
'Void Generic[T](T)
' Is this a generic method definition? True
' Is it a generic method? True
' Does it have unassigned generic parameters? True
' List type arguments (1):
' T parameter position: 0
' declaring method: Void Generic[T](T)
'
'Void Generic[Int32](Int32)
' Is this a generic method definition? False
' Is it a generic method? True
' Does it have unassigned generic parameters? False
' List type arguments (1):
' System.Int32
'
'Here it is: 42
'
'Here it is: 42
'
'The definition is the same: True
'
Açıklamalar
Bildirim yöntemi genel bir yöntem tanımıdır. Yani, DeclaringMethod döndürmezse null
döndürür DeclaringMethod.IsGenericMethodDefinition
true
.
ve DeclaringMethod özellikleri, DeclaringType genel tür parametresinin başlangıçta tanımlandığı genel tür tanımını veya genel yöntem tanımını tanımlar:
DeclaringMethod özelliği, genel bir yöntem tanımını temsil eden MethodInfo bir MethodInfodöndürürse ve geçerli Type nesne bu genel yöntem tanımının tür parametresini temsil eder.
DeclaringMethod özelliği döndürürse DeclaringType
null
, özellik her zaman genel tür tanımını temsil eden bir Type nesne döndürür ve geçerli Type nesne bu genel tür tanımının tür parametresini temsil eder.DeclaringMethod özelliği olan bir tür IsGenericParameter üzerinde özelliğini
false
almak bir InvalidOperationExceptionoluşturur.
MethodBase özelliği MethodInfo tarafından DeclaringMethod döndürülen, genel bir yöntem durumunda veya genel oluşturucu durumunda bir ConstructorInfo olur.
Not
.NET Framework sürüm 2.0'da genel oluşturucular desteklenmez.
Genel yansımada kullanılan terimlerin sabit koşullarının listesi için özellik açıklamalarına bakın IsGenericType .