Copies data from an unmanaged memory pointer to a managed 16-bit signed integer array.
(in mscorlib.dll)
Visual Basic (Declaration)
<SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags := SecurityPermissionFlag.UnmanagedCode)> _
Public Shared Sub Copy ( _
source As IntPtr, _
destination As Short(), _
startIndex As Integer, _
length As Integer _
)
Dim source As IntPtr
Dim destination As Short()
Dim startIndex As Integer
Dim length As Integer
Marshal.Copy(source, destination, startIndex, _
length)
[SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
public static void Copy(
IntPtr source,
short[] destination,
int startIndex,
int length
)
[SecurityPermissionAttribute(SecurityAction::LinkDemand, Flags = SecurityPermissionFlag::UnmanagedCode)]
public:
static void Copy(
IntPtr source,
array<short>^ destination,
int startIndex,
int length
)
public static function Copy(
source : IntPtr,
destination : short[],
startIndex : int,
length : int
)
| Exception | Condition |
|---|
| ArgumentNullException |
source, destination, startIndex, or length is nullNothingnullptra null reference (Nothing in Visual Basic). |
Unmanaged, C-style arrays do not contain bounds information, which prevents the startIndex and length parameters from being validated. Thus, the unmanaged data corresponding to the source parameter populates the managed array regardless of its usefulness. You must initalize the managed array with the appropriate size before calling the Marshal..::.Copy method.
The following code example copies an array to unmanaged memory and then copies the unmanaged array back to managed memory.
Imports System
Imports System.Runtime.InteropServices
Module Example
Sub Main()
' Create a managed array.
Dim managedArray As Short() = {1, 2, 3, 4}
' Initialize unmanged memory to hold the array.
Dim size As Integer = Marshal.SizeOf(managedArray(0)) * managedArray.Length
Dim pnt As IntPtr = Marshal.AllocHGlobal(size)
Try
' Copy the array to unmanaged memory.
Marshal.Copy(managedArray, 0, pnt, managedArray.Length)
' Copy the unmanaged array back to another managed array.
Dim managedArray2(managedArray.Length) As Short
Marshal.Copy(pnt, managedArray2, 0, managedArray.Length)
Console.WriteLine("The array was coppied to unmanaged memory and back.")
Finally
' Free the unmanaged memory.
Marshal.FreeHGlobal(pnt)
End Try
End Sub
End Module
using System;
using System.Runtime.InteropServices;
class Example
{
static void Main()
{
// Create a managed array.
short[] managedArray = { 1, 2, 3, 4 };
// Initialize unmanged memory to hold the array.
int size = Marshal.SizeOf(managedArray[0]) * managedArray.Length;
IntPtr pnt = Marshal.AllocHGlobal(size);
try
{
// Copy the array to unmanaged memory.
Marshal.Copy(managedArray, 0, pnt, managedArray.Length);
// Copy the unmanaged array back to another managed array.
short[] managedArray2 = new short[managedArray.Length];
Marshal.Copy(pnt, managedArray2, 0, managedArray.Length);
Console.WriteLine("The array was coppied to unmanaged memory and back.");
}
finally
{
// Free the unmanaged memory.
Marshal.FreeHGlobal(pnt);
}
}
}
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, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
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.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 3.5, 2.0, 1.0
XNA Framework
Supported in: 3.0, 2.0, 1.0
Reference