MethodBase.GetParameters 方法

定义

命名空间:

System.Reflection

程序集:

System.Runtime.dll

Source:

MethodBase.cs

当在派生类中重写时，获取指定的方法或构造函数的参数。

public:
 abstract cli::array <System::Reflection::ParameterInfo ^> ^ GetParameters();

public abstract System.Reflection.ParameterInfo[] GetParameters ();

abstract member GetParameters : unit -> System.Reflection.ParameterInfo[]

Public MustOverride Function GetParameters () As ParameterInfo()

返回

ParameterInfo[]

ParameterInfo 类型的数组，包含与此 MethodBase 实例所反射的方法（或构造函数）的签名匹配的信息。

示例

以下示例使用 GetParameters 方法检索委托的 Invoke 方法的参数。

该示例定义一个名为 的 MyDelegate 委托和一个名为 ev 类型的 MyDelegate事件。 方法中的 Main 代码通过获取事件的委托类型、获取 Invoke 委托类型的 方法，然后检索并显示参数来发现事件签名。

// 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

另请参阅

• ParameterInfo