Type.MakeArrayType Method (Int32)
Assembly: mscorlib (in mscorlib.dll)
The MakeArrayType method provides a way to generate array types whose element types are computed at run time.
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| The common language runtime makes a distinction between vectors —one-dimensional arrays that are always zero-based — and multidimensional arrays. You cannot use this method overload to create a vector type; if rank is 1, this method overload returns a multidimensional array type that happens to have one dimension. Use the MakeArrayType method overload to create vector types. |
The following code example creates array, ref (ByRef in Visual Basic), and pointer types for the Test class.
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* */
import System.*;
import System.Reflection.*;
public class Example
{
public static void main(String[] args)
{
// Create a Type object that represents a one-dimensional
// array of Example objects.
Type t = Example.class.ToType().MakeArrayType();
Console.WriteLine("\r\nArray of Example: {0}", t);
// Create a Type object that represents a two-dimensional
// array of Example objects.
t = Example.class.ToType().MakeArrayType(2);
Console.WriteLine("\r\nTwo-dimensional array of Example: {0}", t);
// Demonstrate an exception when an invalid array rank is
// specified.
try {
t = Example.class.ToType().MakeArrayType(-1);
}
catch (System.Exception ex) {
Console.WriteLine("\r\n{0}", ex);
}
// Create a Type object that represents a ByRef parameter
// of type Example.
t = Example.class.ToType().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 = Example.class.ToType();
MethodInfo mi = t2.GetMethod("Test");
ParameterInfo pi = mi.GetParameters()[0];
Type pt = pi.get_ParameterType();
Console.WriteLine("Are the ByRef types equal? {0}", new
Boolean(t == pt));
// Create a Type object that represents a pointer to an
// Example object.
t = Example.class.ToType().MakePointerType();
Console.WriteLine("\r\nPointer to Example: {0}", t);
} //main
// A sample method with a ByRef parameter.
//
public void Test(Example e)
{
} //Test
} //Example
/* 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.jsl:line 2999
at Example.main()
ByRef Example: Example&
Are the ByRef types equal? false
Pointer to Example: Example*
*/
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
Note