/// <summary>
/// Constructor to support serialization required for storing the task.
/// </summary>
/// <param name="info">The serialization information.</param>
/// <param name="context">The serialization context.</param>
protected DownloadTask(SerializationInfo info, StreamingContext context)
{
var reader = new SerializationInfoReader(info, context);
DownloadItem = reader.Get("_manifest", (DownloadItem)null);
_state = reader.Get("_state", DownloadTaskState.None);
_id = reader.Get("_id", Guid.Empty);
JobId = reader.Get("_jobId", (Guid?)null);
TransferredSize = reader.Get("_transferSize", 0);
FileSize = reader.Get("_fileSize", 0);
_createDate = TimeZoneInfo.ConvertTime(reader.Get("_createDate", DateTime.Now), TimeZoneInfo.Local);
_fileName = reader.Get("_fileName", (string)null);
_errorText = reader.Get("_errorText", (string)null);
_supportsBITS = reader.Get("_supportsBITS", false);
if (reader.Contains("_downloadFilesBase"))
{
DownloadFilesBase = reader.Get("_downloadFilesBase", (string)null);
}
else /* there used to be a typo in the field name */
{
DownloadFilesBase = reader.Get("_donwnloadFilesBase", (string)null);
}
if (reader.Contains("_downloadErrorResumeCount"))
{
_downloadErrorResumeCount = reader.Get("_downloadErrorResumeCount", 0);
}
}
public DownloadDataEventArgs(string url, string path, string name, DownloadTaskState downloadTaskState)
{
this.Name = name;
this.Url = url;
this.Path = path;
this.State = downloadTaskState;
}
public DownloadDataEventArgs(DownloadTask downloadTask)
{
this.Name = System.IO.Path.GetFileName(downloadTask.Path);
this.Url = downloadTask.Url;
this.Path = downloadTask.Path;
this.State = downloadTask.State;
}
public DownloadTask()
{
state = DownloadTaskState.Idle;
urls = new List<string>();
downloadedContents = null;
thread = null;
abortSignal = false;
urlsFile = "frequency.txt";
writePath = "IcibaHtmls\\";
wordToUrl = GetRealUrl;
}
internal void InvokeStateChangeEvent(string name, string url, string path, DownloadTaskState state)
{
if (this.StateChange != null)
{
DownloadDataEventArgs eventArgs = new DownloadDataEventArgs()
{
Name = name,
Url = url,
Path = path,
State = state
};
this.StateChange.Invoke(this, eventArgs);//触发事件
}
}
/// <summary>
/// Initializes a new instance of the <see cref="DownloadTaskStateChangedEventMessage"/> class.
/// </summary>
/// <param name="state">The state.</param>
public DownloadTaskStateChangedEventMessage(DownloadTaskState state)
{
State = state;
}
private void ChangeState(DownloadTaskState newState)
{
state = newState;
Log("change state, new state is: " + newState);
}
/// <summary>
/// Changes the state of the download task.
/// </summary>
/// <param name="downloadTaskState">State of the download task.</param>
public void ChangeState(DownloadTaskState downloadTaskState)
{
State = downloadTaskState;
m_EventManager.EventPublisher.Publish(new DownloadTaskStateChangedEventMessage(downloadTaskState));
}
/// <summary>
/// Changes the state of the download task.
/// </summary>
/// <param name="downloadTaskState">State of the download task.</param>
public void ChangeState(DownloadTaskState downloadTaskState)
{
State = downloadTaskState;
m_EventManager.EventPublisher.Publish(new DownloadTaskStateChangedEventMessage(downloadTaskState));
}
/// <summary>
/// Initializes a new instance of the <see cref="DownloadTaskStateChangedEventMessage"/> class.
/// </summary>
/// <param name="state">The state.</param>
public DownloadTaskStateChangedEventMessage(DownloadTaskState state)
{
State = state;
}