Retourne un objet Type qui représente un tableau du type actuel, avec le nombre spécifié de dimensions.
Assembly : mscorlib (dans mscorlib.dll)
Public Overridable Function MakeArrayType ( _ rank As Integer _ ) As Type
public virtual Type MakeArrayType( int rank )
public: virtual Type^ MakeArrayType( int rank )
abstract MakeArrayType : rank:int -> Type override MakeArrayType : rank:int -> Type
Paramètres
- rank
- Type : System.Int32
Nombre de dimensions pour le tableau. Ce nombre doit être inférieur ou égal à 32.
Valeur de retour
Type : System.TypeObjet qui représente un tableau du type actuel, avec le nombre spécifié de dimensions.
| Exception | Condition |
|---|---|
| IndexOutOfRangeException |
rank n'est pas valide. Par exemple, zéro ou un nombre négatif. |
| NotSupportedException |
La méthode appelée n'est pas prise en charge dans la classe de base. |
| TypeLoadException |
Le type actuel est TypedReference. ou Le type actuel est un type ByRef. En d'autres termes, Type.IsByRef retourne la valeur true. ou rank est supérieur à 32. |
La méthode MakeArrayType offre un moyen de générer des types tableau dont les types d'éléments sont calculés au moment de l'exécution.
Remarque
|
|---|
|
Le Common Language Runtime établit une distinction entre les vecteurs (c'est-à-dire les tableaux unidimensionnels qui sont toujours de base zéro) et les tableaux multidimensionnels. Un vecteur, qui a toujours une seule dimension, n'est pas identique à un tableau multidimensionnel qui n'a qu'une seule dimension. Vous ne pouvez pas utiliser cette surcharge de méthode pour créer un type vectoriel ; si rank est 1, cette surcharge de méthode retourne un type de tableau multidimensionnel qui paradoxalement n'a qu'une dimension. Utilisez la surcharge de méthode MakeArrayType() pour créer des types vectoriels. |
L'exemple de code suivant crée un tableau, ref (ByRef en Visual Basic), et des type pointeur pour la classe Test.
Imports System Imports System.Reflection Imports Microsoft.VisualBasic 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*
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* */
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* */
.NET Framework
Pris en charge dans : 4, 3.5, 3.0, 2.0.NET Framework Client Profile
Pris en charge dans : 4, 3.5 SP1Pris en charge dans :
Windows 7, Windows Vista SP1 ou ultérieur, Windows XP SP3, Windows XP SP2 Édition x64, Windows Server 2008 (installation minimale non prise en charge), Windows Server 2008 R2 (installation minimale prise en charge avec SP1 ou version ultérieure), Windows Server 2003 SP2
Le .NET Framework ne prend pas en charge toutes les versions de chaque plateforme. Pour obtenir la liste des versions prises en charge, consultez Configuration requise du .NET Framework.
Référence
|
Date |
Historique |
Motif |
|---|---|---|
|
Juin 2010 |
Exception manquante TypeLoadException ajoutée. |
Commentaires client. |
Remarque