/// <summary>
/// Downloads a document from a specified url.
/// </summary>
/// <param name="file">The object which holds the downloading file details.</param>
public async void DownloadFileAsync(WebOperationDownloadObject file)
{
try
{
WebRequest = (HttpWebRequest)WebRequest.Create(file.Url);
WebRequest.Proxy = Proxy;
WebRequest.Method = WebRequestMethods.Http.Get;
string filePath = SetFilePath(file);
using (var response = (HttpWebResponse)await WebRequest.GetResponseAsync())
{
long fileSize = response.ContentLength;
byte[] buffer = new byte[fileSize];
using (var reader = response.GetResponseStream())
{
using (var filestream = File.Create(filePath))
{
WriteFileDetail(filePath, fileSize);
int bytesRead;
while (reader != null && (bytesRead = await reader.ReadAsync(buffer, 0, buffer.Length)) != 0)
{
while (WebOperationState == State.Paused)
{
await Task.Delay(1000);
}
await filestream.WriteAsync(buffer, 0, bytesRead);
WebOperationProgress?.Invoke(this, new AsyncWebOperationsProgressArgs(fileSize, filestream.Length));
await filestream.FlushAsync();
}
}
}
}
WebOperationCompleted?.Invoke(this, new AsyncWebOperationsCompleteArgs());
}
catch (WebException e)
{
if (e.Status == WebExceptionStatus.RequestCanceled)
{
WebOperationCompleted(this, new AsyncWebOperationsCompleteArgs(State.Stopped));
}
}
catch (Exception e)
{
MessageBox.Show("" + e.InnerException.Message);
}
}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
protected virtual void OnWebOperationProgress(AsyncWebOperationsProgressArgs e)
{
WebOperationProgress?.Invoke(this, e);
}