/// <summary>
/// cancellation of the token and stops loading website if currently loading any
/// </summary>
public void CancelCollectData()
{
if (StopTS != null && !StopTS.IsCancellationRequested)
{
if (WebBrowser.IsLoading)
{
WebBrowser.Stop();
}
StopTS.Cancel(); //cancel browsing
}
}
/// <summary>
/// creates new cancellation token, calls LoopCollectingAsync
/// finally disposes cancellation token
/// </summary>
/// <param name="nameList">list of names/phrases</param>
/// <param name="webBrowser">cefsharp browser interface</param>
/// <param name="searchPhrase">built search phrase</param>
public async Task CollectDataAsync(List <string> nameList, IWpfWebBrowser webBrowser, string searchPhrase)
{
_log.Called(nameList.Count, string.Empty, searchPhrase);
if (StopTS == null || StopTS.IsCancellationRequested) //if cancellation token is null or requested, create new one
{
StopTS = new CancellationTokenSource();
StopCT = StopTS.Token;
WebBrowser = webBrowser;
SearchPhrase = searchPhrase;
NameList = nameList;
PhraseNo = GetPhraseNo();
}
Task task = Task.Run(async() =>
{
await LoopCollectingAsync();
}, StopCT);
try
{
await task;
}
catch (OperationCanceledException e)
{
_log.Info("Cancellation token cancelled: " + e.Message);
}
catch (Exception e)
{
_log.Error(e.Message);
}
finally
{
StopTS.Dispose();
}
StopTS = null;
}
