public void OnDownloadCompleted(object sender, DownloadStringCompletedEventArgs e)
{
AddLogEntry("Download async completed");
WebClient DownloadClient = CurrentDownload;
DatabaseOperation Operation = CurrentOperation;
CurrentDownload = null;
CurrentOperation = null;
if (DownloadClient != null)
{
foreach (KeyValuePair <string, KeyValuePair <DatabaseOperation, WebClient> > Entry in DownloadClientTable)
{
if (DownloadClient == Entry.Value.Value)
{
DownloadClientTable.Remove(Entry.Key);
AddLogEntry("Request withdrawn");
break;
}
}
AddLogEntry($"Request {Operation.Name} completed");
List <IDictionary <string, object> > RequestResult = new List <IDictionary <string, object> >();
try
{
string Content = e.Result;
RequestResult = ParseResponse(Content);
}
catch (Exception ex)
{
AddLogEntry(ex.Message);
}
RequestResultTable.Add(Operation, RequestResult);
AddLogEntry($"Request {Operation.Name} result available");
Operation.Callback?.Invoke(this, new CompletionEventArgs(Operation));
}
if (DownloadClientTable.Count > 0)
{
Windows.UI.Xaml.Window.Current.Dispatcher.BeginInvoke(PopRequest);
}
}
private void StartRequest(DatabaseOperation operation)
{
if (DebugLog)
{
operation.DebugStart();
}
string AddressString = operation.RequestString(QueryScriptPath);
if (!DownloadClientTable.ContainsKey(AddressString))
{
DownloadClientTable.Add(AddressString, new KeyValuePair <DatabaseOperation, WebClient>(operation, new WebClient()));
AddLogEntry($"{operation.TypeName} added");
if (DownloadClientTable.Count == 1)
{
PopRequest();
}
}
else
{
AddLogEntry($"An identical {operation.TypeName} request is already queued");
}
}
