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views:

170

answers:

2

Is there any difference between these two methods of moving a file?

System.IO.FileInfo f = new System.IO.FileInfo(@"c:\foo.txt");
f.MoveTo(@"c:\bar.txt");

//vs

System.IO.File.Move(@"c:\foo.txt", @"c:\bar.txt");
+3  A: 

Via RedGate Reflector:

File.Move()

public static void Move(string sourceFileName, string destFileName)
{
    if ((sourceFileName == null) || (destFileName == null))
    {
        throw new ArgumentNullException((sourceFileName == null) ? "sourceFileName" : "destFileName", Environment.GetResourceString("ArgumentNull_FileName"));
    }
    if ((sourceFileName.Length == 0) || (destFileName.Length == 0))
    {
        throw new ArgumentException(Environment.GetResourceString("Argument_EmptyFileName"), (sourceFileName.Length == 0) ? "sourceFileName" : "destFileName");
    }
    string fullPathInternal = Path.GetFullPathInternal(sourceFileName);
    new FileIOPermission(FileIOPermissionAccess.Write | FileIOPermissionAccess.Read, new string[] { fullPathInternal }, false, false).Demand();
    string dst = Path.GetFullPathInternal(destFileName);
    new FileIOPermission(FileIOPermissionAccess.Write, new string[] { dst }, false, false).Demand();
    if (!InternalExists(fullPathInternal))
    {
        __Error.WinIOError(2, fullPathInternal);
    }
    if (!Win32Native.MoveFile(fullPathInternal, dst))
    {
        __Error.WinIOError();
    }
}

and FileInfo.MoveTo()

public void MoveTo(string destFileName)
{
    if (destFileName == null)
    {
        throw new ArgumentNullException("destFileName");
    }
    if (destFileName.Length == 0)
    {
        throw new ArgumentException(Environment.GetResourceString("Argument_EmptyFileName"), "destFileName");
    }
    new FileIOPermission(FileIOPermissionAccess.Write | FileIOPermissionAccess.Read, new string[] { base.FullPath }, false, false).Demand();
    string fullPathInternal = Path.GetFullPathInternal(destFileName);
    new FileIOPermission(FileIOPermissionAccess.Write, new string[] { fullPathInternal }, false, false).Demand();
    if (!Win32Native.MoveFile(base.FullPath, fullPathInternal))
    {
        __Error.WinIOError();
    }
    base.FullPath = fullPathInternal;
    base.OriginalPath = destFileName;
    this._name = Path.GetFileName(fullPathInternal);
    base._dataInitialised = -1;
}
drachenstern
+1  A: 

The only significant difference I can see is File.Move is static and FileInfo.MoveTo is not.
Apart from that they run approximately the same code.

Jens Granlund
Yeah I agree; and FileInfo inherits FileSystemInfo versus File just inherits Object. FileSystemInfo apparently only gives Marshalling, so I would guess that FileInfo is more Managed Friendly.
drachenstern