托管内存映射文件

Question

我的问题是我无法打开文件。在另一个过程中或在同一个过程中！

代码：

var path = @"c:\work\mmf.dat"; 
var map = "testmap123"; 
var fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite); 

if (fs.Length == 0) 
{ 
    fs.SetLength(1024); 
} 

var sec = new MemoryMappedFileSecurity(); 
var mem = MemoryMappedFile.CreateFromFile(fs, map, fs.Length, MemoryMappedFileAccess.ReadWrite, sec, HandleInheritability.Inheritable, false); 

// Problem here System.UnauthorizedAccessException 

var tmp = MemoryMappedFile.OpenExisting(map, MemoryMappedFileRights.FullControl, HandleInheritability.Inheritable); 

Answer 1

尝试以下操作：

var path = @"c:\diverse\mmf.dat"; 
var map = "testmap123"; 
using (var fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite)) 
{ 

    if (fs.Length == 0) 
    { 
     fs.SetLength(1024); 
    } 
} 
using (var mem = MemoryMappedFile.CreateFromFile(path, FileMode.Open, map, 1024, MemoryMappedFileAccess.Read)) 
{ 
    using (var tmp = MemoryMappedFile.OpenExisting(map)) 
    { 
     //work with tmp 
    } 
}