Type.MakePointerType Method ()
.NET Framework (current version)
Returns a Type object that represents a pointer to the current type.
Assembly: mscorlib (in mscorlib.dll)
| Exception | Condition |
|---|---|
| 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. |
The following code example creates array, ref (ByRef in Visual Basic), and pointer types for the Test class.
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*
Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Show: