/// <summary>
/// Fires the <see cref="ProgressBegin"/> event.
/// </summary>
/// <param name="maxSteps">The number of maximum steps required for the current operation to complete. This argument is optional.</param>
protected virtual void OnProgressBegin(int maxSteps = 1)
{
_progressValue = 0;
if (this.ProgressBegin != null)
{
try
{
var e = new DownloadEventArgs()
{
ProgressMaximum = maxSteps
};
if (_syncRoot != null && _syncRoot.InvokeRequired)
{
_syncRoot.Invoke(this.ProgressBegin, new object[] { this, e });
}
else
{
this.ProgressBegin(this, e);
}
}
catch
{
}
}
}
/// <summary>
/// Fires the <see cref="FileSaved"/> event.
/// </summary>
/// <param name="name">The name of the saved file.</param>
/// <param name="url">The URL of the saved file.</param>
/// <param name="data">The downloaded content that was saved into the file.</param>
/// <param name="msg">The message to include. This argument is optional.</param>
protected virtual void OnFileSaved(string name, string url, byte[] data, string msg = null)
{
if (this.FileSaved != null)
{
var e = new DownloadEventArgs()
{
Data = data, Message = msg, SavedFileName = name, Url = url, TotalBytes = _totalBytesDownloaded
};
if (_syncRoot != null && _syncRoot.InvokeRequired)
{
_syncRoot.Invoke(this.FileSaved, new object[] { this, e });
}
else
{
this.FileSaved(this, e);
}
}
}
/// <summary>
/// Fires the <see cref="ProgressStep"/> event.
/// </summary>
/// <param name="msg">The message to include in the event data. This argument is optional.</param>
protected virtual void OnProgressStep(string msg = null)
{
if (this.ProgressStep != null)
{
var e = new DownloadEventArgs()
{
ProgressValue = ++_progressValue, Message = msg
};
if (_syncRoot != null && _syncRoot.InvokeRequired)
{
_syncRoot.Invoke(this.ProgressStep, new object[] { this, e });
}
else
{
this.ProgressStep(this, e);
}
}
}
/// <summary>
/// Fires the <see cref="FileSaving"/> event.
/// </summary>
/// <param name="name">The name of the file to save.</param>
/// <param name="url">The URL of the file to save.</param>
/// <param name="data">The downloaded content that should be saved.</param>
/// <param name="msg">The message to include. This argument is optional.</param>
/// <returns>
/// 0, if the event is not cancelled;
/// 1, if the event is cancelled but was handled by the user;
/// -1, if the event is cancelled and was not handled by the user.
/// </returns>
protected virtual int OnFileSaving(string name, string url, byte[] data, string msg = null)
{
if (FileSaving != null)
{
var e = new DownloadEventArgs(false)
{
Data = data, Message = msg, SavedFileName = name, Url = url, TotalBytes = _totalBytesDownloaded
};
if (_syncRoot != null && _syncRoot.InvokeRequired)
{
_syncRoot.Invoke(this.FileSaving, new object[] { this, e });
}
else
{
this.FileSaving(this, e);
}
if (e.Cancel)
{
return((e.Handled) ? 1 : -1);
}
}
return(0);
}
