Type.MakePointerType Yöntem

Tanım

Ad Alanı:

System

Bütünleştirilmiş Kodlar:

netstandard.dll, System.Runtime.dll

Kaynak:

Type.cs

Type Geçerli türün işaretçisini temsil eden bir nesne döndürür.

public:
 virtual Type ^ MakePointerType();

public virtual Type MakePointerType();

abstract member MakePointerType : unit -> Type
override this.MakePointerType : unit -> Type

Public Overridable Function MakePointerType () As Type

Döndürülenler

Type

Type Geçerli türün işaretçisini temsil eden nesne.

Özel durumlar

NotSupportedException

Çağrılan yöntem temel sınıfta desteklenmez.

TypeLoadException

Geçerli tür: TypedReference.

-veya-

Geçerli tür bir ByRef türdür. Yani döndürür IsByReftrue.

Örnekler

Aşağıdaki kod örneği, ref sınıfı için dizi, ByRef (Visual Basic'de Test) ve işaretçi türleri oluşturur.

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*

 */

type Example() =
    // A sample method with a ByRef parameter.
    member _.Test(e: Example byref) = ()

do
    // Create a Type object that represents a one-dimensional
    // array of Example objects.
    let t = typeof<Example>.MakeArrayType()
    printfn $"\r\nArray of Example: {t}"

    // Create a Type object that represents a two-dimensional
    // array of Example objects.
    let t = typeof<Example>.MakeArrayType 2
    printfn $"\r\nTwo-dimensional array of Example: {t}"

    // Demonstrate an exception when an invalid array rank is
    // specified.
    try
        let t = typeof<Example>.MakeArrayType -1
        ()
    with ex ->
        printfn $"\r\n{ex}"

    // Create a Type object that represents a ByRef parameter
    // of type Example.
    let t = typeof<Example>.MakeByRefType()
    printfn $"\r\nByRef Example: {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.
    let t2 = typeof<Example>
    let mi = t2.GetMethod "Test"
    let pi = mi.GetParameters()[0]
    let pt = pi.ParameterType
    printfn $"Are the ByRef types equal? {t = pt}"

    // Create a Type object that represents a pointer to an
    // Example object.
    let t = typeof<Example>.MakePointerType()
    printfn $"\r\nPointer to Example: {t}"

(* 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*

Açıklamalar

yöntemi, MakePointerType parametre listeleri için işaretçi türleri oluşturmanın bir yolunu sağlar.

Geçerli Type nesnesi Int32 temsil ediyorsa, Microsoft ara dilin (MSIL) söz dizimini kullanarak, bu yöntem Type temsil eden bir Int32* nesnesi döndürür.

Ayrıca bkz.

• MakeByRefType()
• MakeArrayType()