ParameterInfo.Name 屬性

定義

取得參數的名稱。Gets the name of the parameter.

public:
 virtual property System::String ^ Name { System::String ^ get(); };
public virtual string Name { get; }
public virtual string? Name { get; }
member this.Name : string
Public Overridable ReadOnly Property Name As String

屬性值

String

這個參數的簡單名稱。The simple name of this parameter.

範例

下列範例示範如何取得 ParameterInfo 方法參數的物件,然後使用 Name 屬性取得參數名稱。The following example shows how to get ParameterInfo objects for the parameters of a method, and then use the Name property to obtain the parameter names.

using namespace System;
using namespace System::Reflection;
using namespace System::Runtime::InteropServices;
public ref class parminfo
{
public:
   static void mymethod( int int1m, [Out]interior_ptr<String^> str2m, interior_ptr<String^> str3m )
   {
       *str2m = "in mymethod";
   }

};

int main()
{
   Console::WriteLine( "\nReflection.Parameterinfo" );
   
   //Get the ParameterInfo parameter of a function.
   //Get the type.
   Type^ Mytype = Type::GetType( "parminfo" );
   
   //Get and display the method.
   MethodBase^ Mymethodbase = Mytype->GetMethod( "mymethod" );
   Console::Write( "\nMymethodbase = {0}", Mymethodbase );
   
   //Get the ParameterInfo array.
   array<ParameterInfo^>^Myarray = Mymethodbase->GetParameters();
   
   //Get and display the name of each parameter.
   System::Collections::IEnumerator^ enum0 = Myarray->GetEnumerator();
   while ( enum0->MoveNext() )
   {
      ParameterInfo^ Myparam = safe_cast<ParameterInfo^>(enum0->Current);
      Console::Write( "\nFor parameter # {0}, the Name is - {1}", Myparam->Position, Myparam->Name );
   }

   return 0;
}

/*
This code produces the following output:

Reflection.ParameterInfo

Mymethodbase
= Void mymethod (Int32, System.String ByRef, System.String ByRef)
For parameter # 0, the Name is - int1m
For parameter # 1, the Name is - str2m
For parameter # 2, the Name is - str3m
*/
using System;
using System.Reflection;

class parminfo
{
    public static void mymethod (
       int int1m, out string str2m, ref string str3m)
    {
       str2m = "in mymethod";
    }

    public static int Main(string[] args)
    {
       Console.WriteLine("\nReflection.Parameterinfo");

       //Get the ParameterInfo parameter of a function.

       //Get the type.
       Type Mytype = Type.GetType("parminfo");

       //Get and display the method.
       MethodBase Mymethodbase = Mytype.GetMethod("mymethod");
       Console.Write("\nMymethodbase = " + Mymethodbase);

       //Get the ParameterInfo array.
       ParameterInfo[] Myarray = Mymethodbase.GetParameters();

       //Get and display the name of each parameter.
       foreach (ParameterInfo Myparam in Myarray)
       {
          Console.Write ("\nFor parameter # "   + Myparam.Position
             + ", the Name is - " +  Myparam.Name);
       }
       return 0;
    }
 }
 /*
 This code produces the following output:

 Reflection.ParameterInfo

 Mymethodbase
 = Void mymethod (Int32, System.String ByRef, System.String ByRef)
 For parameter # 0, the Name is - int1m
 For parameter # 1, the Name is - str2m
 For parameter # 2, the Name is - str3m
 */
Imports System.Reflection

Class parminfo
    
    Public Shared Sub mymethod(int1m As Integer, ByRef str2m As String, _
    ByRef str3m As String)
        str2m = "in mymethod"
    End Sub
       
    Public Shared Function Main() As Integer
        Console.WriteLine(ControlChars.CrLf + "Reflection.Parameterinfo")
        
        'Get the ParameterInfo parameter of a function.
        'Get the type.
        Dim Mytype As Type = Type.GetType("parminfo")
        
        'Get and display the method.
        Dim Mymethodbase As MethodBase = Mytype.GetMethod("mymethod")
        Console.Write(ControlChars.CrLf _
           + "Mymethodbase = " + Mymethodbase.ToString())
        
        'Get the ParameterInfo array.
        Dim Myarray As ParameterInfo() = Mymethodbase.GetParameters()
        
        'Get and display the name of each parameter.
        Dim Myparam As ParameterInfo
        For Each Myparam In  Myarray
            Console.Write(ControlChars.CrLf _
               + "For parameter # " + Myparam.Position.ToString() _
               + ", the Name is - " + Myparam.Name)
        Next Myparam
        Return 0
    End Function
End Class

' This code produces the following output:
'
' Reflection.ParameterInfo
'  
' Mymethodbase
' = Void mymethod (Int32, System.String ByRef, System.String ByRef)
' For parameter # 0, the Name is - int1m
' For parameter # 1, the Name is - str2m
' For parameter # 2, the Name is - str3m

備註

這個屬性會利用受保護的 NameImpl 欄位,而且相依于可能無法在所有編譯器中使用的選擇性中繼資料旗標。This property utilizes the protected NameImpl field, and depends on an optional metadata flag that might not be available in all compilers.

若要取得 ParameterInfo 陣列,請先取得方法或函式,然後再呼叫 MethodBase.GetParameters 方法。To get the ParameterInfo array, first get the method or the constructor and then call the MethodBase.GetParameters method.

警告

如果這 ParameterInfo 代表傳回值 (也就是使用 MethodInfo.ReturnParameter 屬性) 取得此屬性時,這個屬性將會是 nullIf this ParameterInfo represents a return value (that is, if it was obtained by using the MethodInfo.ReturnParameter property), this property will be null.

適用於