private Task <List <String> > GetIdentificationsAsync()
{
var tcs = new TaskCompletionSource <List <string> >();
try {
var control = new R100DeviceControl();
Action <List <string> > handler = null;
handler = result => {
// Once event raised then set the
// Result property on the underlying Task.
control.OnUserDB -= handler; //optional to unsubscribe from event
tcs.TrySetResult(result);
};
control.OnUserDB += handler;
control.Open();
int count = 0;
//call async event
int nResult = control.DownloadUserDB(out count);
} catch (Exception ex) {
//Bubble the error up to be handled by calling client
tcs.TrySetException(ex);
}
// Return the underlying Task. The client code
// waits on the Result property, and handles exceptions
// in the try-catch block there.
return(tcs.Task);
}
public void Open()
{
var control = new R100DeviceControl();
control.OnUserDB += Control_OnUserDB;
control.Open();
// you may need to store nResult and count in a field?
nResult = control.DownloadUserDB(out int count);
}
