/// <summary>
/// Асинхронная загрузка файлов созданием нового таска
/// </summary>
/// <param name="dataInfo"></param>
/// <returns></returns>
public async Task<UploadResult> UploadingAsync(DataInfo dataInfo)
{
try
{
// функция загрузки
Func<UploadResult> uploadFunc = new Func<UploadResult>(() => UploadFiles(dataInfo));
// создание таска фабрикой
Task<UploadResult> returnTaskObject = Task.Factory.StartNew<UploadResult>(uploadFunc);
// асинхронный запуск таска с результатом
var result = await returnTaskObject;
return result;
}
catch (Exception)
{
throw new FaultException<UploadFault>(new UploadFault { Message = "Ошибка загрузки" });
}
}
/// <summary>
/// Асинхронный метод старта з агрузки
/// </summary>
/// <param name="dataInfo"></param>
/// <param name="callback"></param>
/// <param name="state"></param>
/// <returns></returns>
public IAsyncResult BeginUploading(DataInfo dataInfo, AsyncCallback callback, object state)
{
// коллбэк завершения
var tcs = new TaskCompletionSource<UploadResult>(state);
var task = UploadingAsync(dataInfo);
task.ContinueWith(t =>
{
if (t.IsFaulted)
tcs.TrySetException(t.Exception.InnerExceptions);
else if (t.IsCanceled)
tcs.TrySetCanceled();
else
tcs.TrySetResult(t.Result);
if (callback != null)
callback(tcs.Task);
});
return tcs.Task;
}
/// <summary>
/// Метод, загружающий файлы
/// </summary>
/// <param name="dataInfo"></param>
/// <returns></returns>
private UploadResult UploadFiles(DataInfo dataInfo)
{
UploadResult result = new UploadResult();
// TODO: вынести в настройки
string FilePath = Path.Combine("d:/Files/2015/", dataInfo.FileName);
int length = 0;
using (FileStream writer = new FileStream(FilePath, FileMode.Create))
{
int readCount;
var buffer = new byte[8192];
while ((readCount = dataInfo.Stream.Read(buffer, 0, buffer.Length)) != 0)
{
writer.Write(buffer, 0, readCount);
length += readCount;
}
}
return result;
}