This documentation is archived and is not being maintained.

MemoryMappedFile.CreateViewAccessor Method

Creates a MemoryMappedViewAccessor that maps to a view of the memory-mapped file.

Namespace:  System.IO.MemoryMappedFiles
Assembly:  System.Core (in System.Core.dll)

public MemoryMappedViewAccessor CreateViewAccessor()

Return Value

Type: System.IO.MemoryMappedFiles.MemoryMappedViewAccessor
A randomly accessible block of memory.

ExceptionCondition
UnauthorizedAccessException

Access to the memory-mapped file is unauthorized.

You can use the view returned by this method for random access to a memory-mapped file.

The following example creates a view of a memory-mapped file and edits it. This code example is part of a larger example provided for the MemoryMappedFile class.


        // Create a random access view, from the 256th megabyte (the offset)
        // to the 768th megabyte (the offset plus length).
        using (var accessor = mmf.CreateViewAccessor(offset, length))
			{

				int colorSize = Marshal.SizeOf(typeof(MyColor));
				MyColor color;

				// Make changes to the view.
				for (long i = 0; i < length; i += colorSize)
				{
					accessor.Read(i, out color);
					color.Brighten(10);
					accessor.Write(i, ref color);
				}
			}


.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Show: