我们可以合并两个内存映射文件吗
本文关键字:内存 两个 映射 文件 合并 我们 | 更新日期: 2023-09-27 18:27:19
我们可以合并两个内存映射文件吗?如果是,如何?如果没有,为什么不呢?
以下是我使用MemoryMappedFiles
的第一次体验,请尝试一下:
String f1Path = @"C:'Temp'Test1.txt";
String f2Path = @"C:'Temp'Test2.txt";
byte[] buffer;
int offset;
int length;
using (FileStream f1ReadStream = new FileStream(f1Path, FileMode.Open, FileAccess.Read))
{
offset = (int)f1ReadStream.Length;
}
using (FileStream f2ReadStream = new FileStream(f2Path, FileMode.Open, FileAccess.Read))
{
length = (int)f2ReadStream.Length;
}
// read file2 and append all to file1
using (var mappedFile2 = MemoryMappedFile.CreateFromFile(f2Path, FileMode.Open, null, length))
{
using (var reader = mappedFile2.CreateViewStream(0, length, MemoryMappedFileAccess.Read))
{
// Read from MMF
buffer = new byte[length];
reader.Read(buffer, 0, length);
}
}
using (var mappedFile1 = MemoryMappedFile.CreateFromFile(f1Path,FileMode.Open, null, offset + length))
{
// Create writer to MMF
using (var writer = mappedFile1.CreateViewAccessor(offset, length, MemoryMappedFileAccess.Write))
{
// Write to MMF
writer.WriteArray<byte>(0, buffer, 0, length);
}
}