Type::MakeArrayType Method (Int32)
Updated: June 2010
Returns a Type object representing an array of the current type, with the specified number of dimensions.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- rank
- Type: System::Int32
The number of dimensions for the array. The number must be less than or equal to 32.
Return Value
Type: System::TypeA Type object representing an array of the current type, with the specified number of dimensions.
| Exception | Condition |
|---|---|
| IndexOutOfRangeException | rank is invalid. For example, 0 or negative. |
| NotSupportedException | The invoked method is not supported in the base class. |
| TypeLoadException | The current type is TypedReference. -or- The current type is a ByRef type. That is, Type::IsByRef returns true. -or- rank is greater than 32. |
The MakeArrayType method provides a way to generate array types whose element types are computed at run time.
Note: |
|---|
The common language runtime makes a distinction between vectors (that is, one-dimensional arrays that are always zero-based) and multidimensional arrays. A vector, which always has only one dimension, is not the same as a multidimensional array that happens to have only one dimension. 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* */
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Date | History | Reason |
|---|---|---|
June 2010 | Added missing TypeLoadException exception. | Customer feedback. |
Note: