Marshal::ReadInt16 Method (IntPtr)

.NET Framework (current version)

Reads a 16-bit signed integer from unmanaged memory.

Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)

Syntax

public:
[SecurityCriticalAttribute]
static short ReadInt16(
	IntPtr ptr
)

Parameters

ptr: Type: System::IntPtr
The address in unmanaged memory from which to read.

Return Value

Type: System::Int16

The 16-bit signed integer read from unmanaged memory.

Exceptions

Exception	Condition
AccessViolationException	ptr is not a recognized format. -or- ptr is null. -or- ptr is invalid.

ReadInt16 has an implied offset of 0. This method enables direct interaction with an unmanaged C-style Int16 array, eliminating the expense of copying an entire unmanaged array (using Marshal::Copy) to a separate managed array before reading its element values.

Reading from unaligned memory locations is supported.

Examples

The following example demonstrates how to read and write to an unmanaged array using the ReadInt16 and WriteInt16 methods.

C++

No code example is currently available or this language may not be supported.

The following example demonstrates how to use the ReadInt16 method to read the value of an unmanaged short variable.

C++


using namespace System;
using namespace System::Runtime::InteropServices;



void main()
{
	// Create an unmanaged short.
	short myShort = 42;

	// Read the short as a managed Int16.
        Int16 ^ myManagedVal = Marshal::ReadInt16((IntPtr) &myShort);

	// Display the value to the console.
	Console::WriteLine(myManagedVal);
}

Security

SecurityCriticalAttribute

requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

Version Information

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
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