private static string TransferContentFromDevice(string saveToPath, IPortableDeviceContent content, string parentObjectID)
{
IPortableDeviceResources resources;
content.Transfer(out resources);
PortableDeviceApiLib.IStream wpdStream = null;
uint optimalTransferSize = int.MaxValue;
PortableDeviceApiLib._tagpropertykey property = new PortableDeviceApiLib._tagpropertykey();
property.fmtid = new Guid(0xE81E79BE, 0x34F0, 0x41BF, 0xB5, 0x3F, 0xF1, 0xA0, 0x6A, 0xE8, 0x78, 0x42);
property.pid = 0;
try
{
resources.GetStream(parentObjectID, ref property, 0, ref optimalTransferSize, out wpdStream);
System.Runtime.InteropServices.ComTypes.IStream sourceStream = (System.Runtime.InteropServices.ComTypes.IStream)wpdStream;
using (FileStream targetStream = new FileStream(saveToPath, FileMode.Create, FileAccess.Write))
{
int filesize = int.Parse(optimalTransferSize.ToString());
var buffer = new byte[filesize];
int bytesRead = 0;
IntPtr bytesReadIntPtr = new IntPtr(bytesRead);
//设备建议读取长度optimalTransferSize长度一般为262144即256k，
//注释掉的sourceStream.Read不能更新bytesRead值，do循环只能执行一次即写入256k数据。
//创建nextBufferSize变量，用于每次Read后计算下一次buffer长度
int nextBufferSize = 0;
do
{
if (bytesReadIntPtr == IntPtr.Zero)
{
bytesReadIntPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(int)));
}
sourceStream.Read(buffer, filesize, bytesReadIntPtr);
nextBufferSize = Marshal.ReadInt32(bytesReadIntPtr);
if (filesize > nextBufferSize)
{
filesize = nextBufferSize;
}
targetStream.Write(buffer, 0, filesize);
} while (nextBufferSize > 0);
Marshal.FreeCoTaskMem(bytesReadIntPtr);
}
}
catch (Exception ex)
{
return(ex.Message);
}
finally
{
if (wpdStream != null)
{
Marshal.ReleaseComObject(wpdStream);
}
}
return(string.Empty);
}
private void DownloadFile(TransFileObject file, string destPath, IPortableDeviceContent content)
{
IPortableDeviceProperties properties;
content.Properties(out properties);
var downloadFileObj = WrapObject(properties, file.objId);
IPortableDeviceResources resources;
content.Transfer(out resources);
PortableDeviceApiLib.IStream wpdStream;
uint optimalTransferSize = 0;
var property = new _tagpropertykey();
property.fmtid = new Guid(0xE81E79BE, 0x34F0, 0x41BF, 0xB5, 0x3F, 0xF1, 0xA0, 0x6A, 0xE8, 0x78, 0x42);
property.pid = 0;
resources.GetStream(file.objId, ref property, 0, ref optimalTransferSize, out wpdStream);
System.Runtime.InteropServices.ComTypes.IStream sourceStream = (System.Runtime.InteropServices.ComTypes.IStream)wpdStream;
FileStream targetStream = new FileStream(destPath, FileMode.Create, FileAccess.Write);
unsafe {
var buffer = new byte[10240];
int bytesRead;
do
{
sourceStream.Read(buffer, 10240, new IntPtr(&bytesRead));
if (bytesRead <= 0)
{
break;
}
targetStream.Write(buffer, 0, bytesRead);
} while (true /*bytesRead > 0*/);
targetStream.Close();
}
Marshal.ReleaseComObject(sourceStream);
Marshal.ReleaseComObject(wpdStream);
// ファイルの更新日時を更新
DateTime setDate = file.updateTime;
if (setDate.CompareTo(DateTime.MinValue) == 0)
{
setDate = GetImgTakenDate(destPath); // Exifから撮影日時情報を取得
}
File.SetLastWriteTime(destPath, setDate);
}
/// <summary>
/// open a stream on the device for reading
/// </summary>
/// <param name="deviceContent">unmanged device</param>
/// <param name="objectId">object to open</param>
/// <param name="mode">mode to open the stream in</param>
/// <returns></returns>
public IStream OpenResourceStream(IPortableDeviceContent deviceContent, string objectId, uint mode)
{
IPortableDeviceResources resources;
deviceContent.Transfer(out resources);
IStream stream;
uint optimalBufferSize = 0;
resources.GetStream(objectId, PortableDevicePropertyKeys.WPD_RESOURCE_DEFAULT, mode, ref optimalBufferSize, out stream);
return(stream);
}
/// <summary>
/// open a stream on the device for reading
/// </summary>
/// <param name="deviceContent">unmanged device</param>
/// <param name="objectId">object to open</param>
/// <param name="mode">mode to open the stream in</param>
/// <returns></returns>
public IStream OpenResourceStream(IPortableDeviceContent deviceContent, string objectId, uint mode)
{
IPortableDeviceResources resources;
deviceContent.Transfer(out resources);
IStream stream;
uint optimalBufferSize = 0;
resources.GetStream(objectId, PortableDevicePropertyKeys.WPD_RESOURCE_DEFAULT, mode, ref optimalBufferSize, out stream);
//_ULARGE_INTEGER uli = new _ULARGE_INTEGER();
//uli.QuadPart = GetObjectFileSize(deviceContent, objectId);
//stream.SetSize(uli);
return stream;
}
/**
* Copy To PC
*/
public void TransferContentFromDevice(PortableDeviceFile file, string saveToPath, String fileName)
{
FileStream targetStream = null;
try
{
// make sure that we are not holding on to a file.
DisconnectConnect();
// Make sure that the target dir exists.
System.IO.Directory.CreateDirectory(saveToPath);
IPortableDeviceContent content = getContents();
IPortableDeviceResources resources;
content.Transfer(out resources);
PortableDeviceApiLib.IStream wpdStream;
uint optimalTransferSize = 0;
var property = new _tagpropertykey();
property.fmtid = new Guid(0xE81E79BE, 0x34F0, 0x41BF, 0xB5, 0x3F, 0xF1, 0xA0, 0x6A, 0xE8, 0x78, 0x42);
property.pid = 0;
resources.GetStream(file.Id, ref property, 0, ref optimalTransferSize, out wpdStream);
System.Runtime.InteropServices.ComTypes.IStream sourceStream = (System.Runtime.InteropServices.ComTypes.IStream)wpdStream;
// var fileName = Path.GetFileName(file.Id);
targetStream = new FileStream(Path.Combine(saveToPath, fileName), FileMode.Create, FileAccess.Write);
// Getthe total size.
long length = file.size;
long written = 0;
long lPCt = 0;
unsafe
{
var buffer = new byte[1024];
int bytesRead;
do
{
sourceStream.Read(buffer, 1024, new IntPtr(&bytesRead));
targetStream.Write(buffer, 0, bytesRead);
written += 1024;
long PCt = length > 0 ? (100 * written) / length : 100;
if (PCt != lPCt)
{
lPCt = PCt;
Console.WriteLine("Progress: " + lPCt);
}
} while (bytesRead > 0);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
throw ex;
}
finally
{
if (null != targetStream)
{
targetStream.Close();
}
Disconnect();
}
}