protected internal override void HandleProcessedDataRows(object sender, CursorDataReadProgressChangedArgs e)
{
// construct data, create eventargs, raise event
JsonCreator jc = new JsonCreator(this);
List <JObject> list = jc.SerializeRowValues(e.RowValues);
var jsonString = "[" + string.Join(",", list.Select(o => o.ToString())) + "]";
// do custom bubbling up
ExportProgressChangedArgs args = new ExportProgressChangedArgs(
e.RowsProcessed,
e.RowsTotal,
jsonString);
base.OnWriterProgressChanged(args);
}
/// <summary>
/// Handler used to bubble up the ExportProgressChanged event
/// </summary>
/// <param name="e">ExportProgressAsJsonChangedArgs.</param>
protected virtual void OnWriterProgressChanged(ExportProgressChangedArgs e)
{
ExportProgressChangedHandler handler = WriterProgressChanged;
if (handler == null)
{
return;
} // no subscriptions
Delegate[] eventHandlers = handler.GetInvocationList();
foreach (Delegate currentHandler in eventHandlers)
{
ExportProgressChangedHandler currentSubscriber = (ExportProgressChangedHandler)currentHandler;
try
{
currentSubscriber(this, e);
}
catch { }
}
}
// overload that allows derivers to supply their own ExportProgressChangedArgs
protected void BubbleUpProgressEvent(ExportProgressChangedArgs e)
{
OnWriterProgressChanged(e);
}
/// <summary>
/// Raise the ExportProgressChanged event.
/// </summary>
/// <param name="e">ExportProgressAsStringChangedArgs object.</param>
protected virtual void OnExportProgressChanged(ExportProgressChangedArgs e)
{
ExportProgressChanged?.Invoke(this, e);
}
// we need some mechanism to tell consumers about the progress of our export
// the writer classes are not exposed, so we need to capture the events of those classes,
// and then raise an event that consumers can subscribe to.
/// <summary>
/// Event handler for the ExportProgressChanged event.
/// </summary>
/// <param name="sender">sender object.</param>
/// <param name="e">ExportProgressAsJsonChangedArgs object.</param>
public virtual void HandleExportProgressChanged(object sender, ExportProgressChangedArgs e)
{
// just re-raise event
OnExportProgressChanged(e); // outside assemblies can subscribe to this
}