[SOLVED] How to read and write a file using Memory Mapped File C#?

Issue

I have an image in D Drive like “D:\Image\1.tiff”. I want to read this file and write it in an another location, for example in the path “D:\Project\”. How to do this using Memory Mapped File?

Solution

I can now achieve reading and writing a file using Memory Mapped File using the below coding:

FileStream stream = File.OpenRead(@"D:\FFv1\dpx1\1.dpx");
byte[] fileBytes = new byte[stream.Length];
string Output = @"D:\Vanthiya Thevan\FFv1\dpx1\2.dpx";
using (var fileStream = new FileStream(Output, FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite))
using (MemoryMappedFile memoryMapped = MemoryMappedFile.CreateFromFile(fileStream, "MapName", fileBytes.Length,
MemoryMappedFileAccess.ReadWrite, new MemoryMappedFileSecurity(), HandleInheritability.Inheritable, true))
{
    var viewStream = memoryMapped.CreateViewStream();
    viewStream.Write(fileBytes, 0, fileBytes.Length); 
}

Answered By – thevan

Answer Checked By – Jay B. (BugsFixing Admin)

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