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POCopyFileEx wrapper parameters
 

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    <p>I have recently had to change from using <code>File.Copy()</code> to <code>CopyFileEx</code> and I am struggling to find how to use it.</p> <p>After a lot of googling I found <a href="http://msdn.microsoft.com/en-us/magazine/cc163851.aspx" rel="noreferrer">this</a> nice wrapper to use it, but what I need is to get the progress of the copied bytes of the current file, and if possible calculate the progress of copying all files I pass to it.</p> <p>(I know there are projects that have progress bars linked to <code>CopyFileEx</code> but I'm not experienced enough to pull out the relevant code, and I would like to use this wrapper).</p> <p>Presumably just by comparing it to the total bytes of the files to be copied, which I would find beforehand, and working out the percentage from that.</p> <p>My current method of copying is</p> <pre><code>FileRoutines.CopyFile(new FileInfo("source.txt"), new FileInfo("dest.txt")); </code></pre> <p>What I am stuck on is how to overload it with the parameter's needed to get the progress info.</p> <pre><code>public sealed class FileRoutines { public static void CopyFile(FileInfo source, FileInfo destination) { CopyFile(source, destination, CopyFileOptions.None); } public static void CopyFile(FileInfo source, FileInfo destination, CopyFileOptions options) { CopyFile(source, destination, options, null); } public static void CopyFile(FileInfo source, FileInfo destination, CopyFileOptions options, CopyFileCallback callback) { CopyFile(source, destination, options, callback, null); } public static void CopyFile(FileInfo source, FileInfo destination, CopyFileOptions options, CopyFileCallback callback, object state) { if (source == null) throw new ArgumentNullException("source"); if (destination == null) throw new ArgumentNullException("destination"); if ((options &amp; ~CopyFileOptions.All) != 0) throw new ArgumentOutOfRangeException("options"); new FileIOPermission( FileIOPermissionAccess.Read, source.FullName).Demand(); new FileIOPermission( FileIOPermissionAccess.Write, destination.FullName).Demand(); CopyProgressRoutine cpr = callback == null ? null : new CopyProgressRoutine(new CopyProgressData( source, destination, callback, state).CallbackHandler); bool cancel = false; if (!CopyFileEx(source.FullName, destination.FullName, cpr, IntPtr.Zero, ref cancel, (int)options)) { throw new IOException(new Win32Exception().Message); } } private class CopyProgressData { private FileInfo _source = null; private FileInfo _destination = null; private CopyFileCallback _callback = null; private object _state = null; public CopyProgressData(FileInfo source, FileInfo destination, CopyFileCallback callback, object state) { _source = source; _destination = destination; _callback = callback; _state = state; } public int CallbackHandler( long totalFileSize, long totalBytesTransferred, long streamSize, long streamBytesTransferred, int streamNumber, int callbackReason, IntPtr sourceFile, IntPtr destinationFile, IntPtr data) { return (int)_callback(_source, _destination, _state, totalFileSize, totalBytesTransferred); } } private delegate int CopyProgressRoutine( long totalFileSize, long TotalBytesTransferred, long streamSize, long streamBytesTransferred, int streamNumber, int callbackReason, IntPtr sourceFile, IntPtr destinationFile, IntPtr data); [SuppressUnmanagedCodeSecurity] [DllImport("Kernel32.dll", CharSet=CharSet.Auto, SetLastError=true)] private static extern bool CopyFileEx( string lpExistingFileName, string lpNewFileName, CopyProgressRoutine lpProgressRoutine, IntPtr lpData, ref bool pbCancel, int dwCopyFlags); } public delegate CopyFileCallbackAction CopyFileCallback( FileInfo source, FileInfo destination, object state, long totalFileSize, long totalBytesTransferred); public enum CopyFileCallbackAction { Continue = 0, Cancel = 1, Stop = 2, Quiet = 3 } [Flags] public enum CopyFileOptions { None = 0x0, FailIfDestinationExists = 0x1, Restartable = 0x2, AllowDecryptedDestination = 0x8, All = FailIfDestinationExists | Restartable | AllowDecryptedDestination } </code></pre> <p>Any pointers really appreciated.</p>
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