MemoryMappedViewAccessor Class
Represents a randomly accessed view of a memory-mapped file.
System.IO.UnmanagedMemoryAccessor
System.IO.MemoryMappedFiles.MemoryMappedViewAccessor
Assembly: System.Core (in System.Core.dll)
The MemoryMappedViewAccessor type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | CanRead | Determines whether the accessor is readable. (Inherited from UnmanagedMemoryAccessor.) |
![]() | CanWrite | Determines whether the accessory is writable. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Capacity | Gets the capacity of the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | SafeMemoryMappedViewHandle | Gets a handle to the view of a memory-mapped file. |
| Name | Description | |
|---|---|---|
![]() | Dispose() | Releases all resources used by the UnmanagedMemoryAccessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
![]() | Flush | Clears all buffers for this view and causes any buffered data to be written to the underlying file. |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | Read<T> | Reads a structure of type T from the accessor into a provided reference. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadArray<T> | Reads structures of type T from the accessor into an array of type T. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadBoolean | Reads a Boolean value from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadByte | Reads a byte value from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadChar | Reads a character from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadDecimal | Reads a decimal value from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadDouble | Reads a double-precision floating-point value from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadInt16 | Reads a 16-bit integer from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadInt32 | Reads a 32-bit integer from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadInt64 | Reads a 64-bit integer from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadSByte | Reads an 8-bit signed integer from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadSingle | Reads a single-precision floating-point value from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadUInt16 | Reads an unsigned 16-bit integer from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadUInt32 | Reads an unsigned 32-bit integer from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ReadUInt64 | Reads an unsigned 64-bit integer from the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
![]() | Write(Int64, Boolean) | Writes a Boolean value into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, Byte) | Writes a byte value into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, Char) | Writes a character into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, Decimal) | Writes a decimal value into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, Double) | Writes a Double value into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, Int16) | Writes a 16-bit integer into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, Int32) | Writes a 32-bit integer into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, Int64) | Writes a 64-bit integer into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, SByte) | Writes an 8-bit integer into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, Single) | Writes a Single into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, UInt16) | Writes an unsigned 16-bit integer into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, UInt32) | Writes an unsigned 32-bit integer into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write(Int64, UInt64) | Writes an unsigned 64-bit integer into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | Write<T>(Int64, T) | Writes a structure into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
![]() | WriteArray<T> | Writes structures from an array of type T into the accessor. (Inherited from UnmanagedMemoryAccessor.) |
Use the CreateViewAccessor method of a MemoryMappedFile object to get this view.
The following example obtains a MemoryMappedViewAccessor from a large memory-mapped file for editing.
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); } }
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
