public unsafe void DownloadFile(PortableDeviceFile file, string saveToPath)
{
try
{
IPortableDeviceContent content;
this._device.Content(out content);
IPortableDeviceResources resources;
content.Transfer(out resources);
PortableDeviceApiLib.IStream wpdStream;
uint optimalTransferSize = 0;
var property = new _tagpropertykey
{
fmtid = new Guid(0xE81E79BE, 0x34F0, 0x41BF, 0xB5, 0x3F,
0xF1, 0xA0, 0x6A, 0xE8, 0x78, 0x42),
pid = 0
};
resources.GetStream(file.Id, ref property, 0, ref optimalTransferSize,
out wpdStream);
var sourceStream = (System.Runtime.InteropServices.ComTypes.IStream)wpdStream;
var filename = Path.GetFileName(file.Name);
var targetStream = new FileStream(Path.Combine(saveToPath, filename),
FileMode.Create, FileAccess.Write);
unsafe
{
var buffer = new byte[1024];
int bytesRead;
do
{
sourceStream.Read(buffer, 1024, new IntPtr(&bytesRead));
targetStream.Write(buffer, 0, 1024);
} while (bytesRead > 0);
targetStream.Close();
}
Marshal.ReleaseComObject(sourceStream);
Marshal.ReleaseComObject(wpdStream);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
public void DeleteFile(PortableDeviceFile file)
{
try
{
IPortableDeviceContent content;
this._device.Content(out content);
var variant = new PortableDeviceApiLib.tag_inner_PROPVARIANT();
StringToPropVariant(file.Id, out variant);
PortableDeviceApiLib.IPortableDevicePropVariantCollection objectIds =
new PortableDeviceTypesLib.PortableDevicePropVariantCollection()
as PortableDeviceApiLib.IPortableDevicePropVariantCollection;
objectIds.Add(variant);
content.Delete(0, objectIds, null);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
}
