Type.MakeByRefType 方法
定義
重要
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傳回 Type 物件，當做 ref (Visual Basic 中的 ByRef) 參數傳遞時，代表目前的類型。
public:
abstract Type ^ MakeByRefType();public:
virtual Type ^ MakeByRefType();public abstract Type MakeByRefType ();public virtual Type MakeByRefType ();abstract member MakeByRefType : unit -> Typeabstract member MakeByRefType : unit -> Type
override this.MakeByRefType : unit -> TypePublic MustOverride Function MakeByRefType () As TypePublic Overridable Function MakeByRefType () As Type傳回
Type 物件，當做 ref 參數 (在 Visual Basic 中為 ByRef 參數) 傳遞時，代表目前的類型。
例外狀況
基底類別不支援叫用的方法。
範例
下列程式碼範例會在 Visual Basic) 中建立陣列、 ref (ByRef ，以及類別的指標類型 Test 。
using namespace System;
using namespace System::Reflection;
public ref class Example
{
public:
static void Main()
{
// Create a Type object that represents a one-dimensional
// array of Example objects.
Type^ t = Example::typeid->MakeArrayType();
Console::WriteLine( L"\r\nArray of Example: {0}", t );
// Create a Type object that represents a two-dimensional
// array of Example objects.
t = Example::typeid->MakeArrayType( 2 );
Console::WriteLine( L"\r\nTwo-dimensional array of Example: {0}", t );
// Demonstrate an exception when an invalid array rank is
// specified.
try
{
t = Example::typeid->MakeArrayType( -1 );
}
catch ( Exception^ ex )
{
Console::WriteLine( L"\r\n{0}", ex );
}
// Create a Type object that represents a ByRef parameter
// of type Example.
t = Example::typeid->MakeByRefType();
Console::WriteLine( L"\r\nByRef Example: {0}", t );
// Get a Type object representing the Example class, a
// MethodInfo representing the "Test" method, a ParameterInfo
// representing the parameter of type Example, and finally
// a Type object representing the type of this ByRef parameter.
// Compare this Type object with the Type object created using
// MakeByRefType.
Type^ t2 = Example::typeid;
MethodInfo^ mi = t2->GetMethod( L"Test" );
ParameterInfo^ pi = mi->GetParameters()[ 0 ];
Type^ pt = pi->ParameterType;
Console::WriteLine( L"Are the ByRef types equal? {0}", (t == pt) );
// Create a Type object that represents a pointer to an
// Example object.
t = Example::typeid->MakePointerType();
Console::WriteLine( L"\r\nPointer to Example: {0}", t );
}
// A sample method with a ByRef parameter.
//
void Test( interior_ptr<Example^> /*e*/ )
{
}
};
int main()
{
Example::Main();
}
/* This example produces output similar to the following:
Array of Example: Example[]
Two-dimensional array of Example: Example[,]
System.IndexOutOfRangeException: Index was outside the bounds of the array.
at System.RuntimeType.MakeArrayType(Int32 rank) in c:\vbl\ndp\clr\src\BCL\System\RtType.cs:line 2999
at Example.Main()
ByRef Example: Example&
Are the ByRef types equal? True
Pointer to Example: Example*
*/
using System;
using System.Reflection;
public class Example
{
public static void Main()
{
// Create a Type object that represents a one-dimensional
// array of Example objects.
Type t = typeof(Example).MakeArrayType();
Console.WriteLine("\r\nArray of Example: {0}", t);
// Create a Type object that represents a two-dimensional
// array of Example objects.
t = typeof(Example).MakeArrayType(2);
Console.WriteLine("\r\nTwo-dimensional array of Example: {0}", t);
// Demonstrate an exception when an invalid array rank is
// specified.
try
{
t = typeof(Example).MakeArrayType(-1);
}
catch(Exception ex)
{
Console.WriteLine("\r\n{0}", ex);
}
// Create a Type object that represents a ByRef parameter
// of type Example.
t = typeof(Example).MakeByRefType();
Console.WriteLine("\r\nByRef Example: {0}", t);
// Get a Type object representing the Example class, a
// MethodInfo representing the "Test" method, a ParameterInfo
// representing the parameter of type Example, and finally
// a Type object representing the type of this ByRef parameter.
// Compare this Type object with the Type object created using
// MakeByRefType.
Type t2 = typeof(Example);
MethodInfo mi = t2.GetMethod("Test");
ParameterInfo pi = mi.GetParameters()[0];
Type pt = pi.ParameterType;
Console.WriteLine("Are the ByRef types equal? {0}", (t == pt));
// Create a Type object that represents a pointer to an
// Example object.
t = typeof(Example).MakePointerType();
Console.WriteLine("\r\nPointer to Example: {0}", t);
}
// A sample method with a ByRef parameter.
//
public void Test(ref Example e)
{
}
}
/* This example produces output similar to the following:
Array of Example: Example[]
Two-dimensional array of Example: Example[,]
System.IndexOutOfRangeException: Index was outside the bounds of the array.
at System.RuntimeType.MakeArrayType(Int32 rank) in c:\vbl\ndp\clr\src\BCL\System\RtType.cs:line 2999
at Example.Main()
ByRef Example: Example&
Are the ByRef types equal? True
Pointer to Example: Example*
*/
Imports System.Reflection
Public Class Example
Public Shared Sub Main()
' Create a Type object that represents a one-dimensional
' array of Example objects.
Dim t As Type = GetType(Example).MakeArrayType()
Console.WriteLine(vbCrLf & "Array of Example: " & t.ToString())
' Create a Type object that represents a two-dimensional
' array of Example objects.
t = GetType(Example).MakeArrayType(2)
Console.WriteLine(vbCrLf & "Two-dimensional array of Example: " & t.ToString())
' Demonstrate an exception when an invalid array rank is
' specified.
Try
t = GetType(Example).MakeArrayType(-1)
Catch ex As Exception
Console.WriteLine(vbCrLf & ex.ToString())
End Try
' Create a Type object that represents a ByRef parameter
' of type Example.
t = GetType(Example).MakeByRefType()
Console.WriteLine(vbCrLf & "ByRef Example: " & t.ToString())
' Get a Type object representing the Example class, a
' MethodInfo representing the "Test" method, a ParameterInfo
' representing the parameter of type Example, and finally
' a Type object representing the type of this ByRef parameter.
' Compare this Type object with the Type object created using
' MakeByRefType.
Dim t2 As Type = GetType(Example)
Dim mi As MethodInfo = t2.GetMethod("Test")
Dim pi As ParameterInfo = mi.GetParameters()(0)
Dim pt As Type = pi.ParameterType
Console.WriteLine("Are the ByRef types equal? " & (t Is pt))
' Create a Type object that represents a pointer to an
' Example object.
t = GetType(Example).MakePointerType()
Console.WriteLine(vbCrLf & "Pointer to Example: " & t.ToString())
End Sub
' A sample method with a ByRef parameter.
'
Public Sub Test(ByRef e As Example)
End Sub
End Class
' This example produces output similar to the following:
'
'Array of Example: Example[]
'
'Two-dimensional array of Example: Example[,]
'
'System.IndexOutOfRangeException: Index was outside the bounds of the array.
' at System.RuntimeType.MakeArrayType(Int32 rank) in c:\vbl\ndp\clr\src\BCL\System\RtType.cs:line 2999
' at Example.Main()
'
'ByRef Example: Example&
'Are the ByRef types equal? True
'
'Pointer to Example: Example*
備註
MakeByRefType方法會提供一種方法， ref ByRef 在參數清單的 Visual Basic) 中產生類型 (。
使用 Microsoft 中繼語言 (MSIL) 的語法，如果目前的 Type 物件代表 Int32 ，這個方法會傳回 Type 代表的物件 Int32& 。