As a general rule, the only place you should ever be directly affecting a control is the form it is a child of. is a registry and results database of publicly and privately supported clinical studies of human participants conducted around the world.
The proper way to do this is for that class to raise an event and then expose the data, either via a property or the event args, and then the form can handle the event, get the data and update its own TextBox. If you know it's for a WinForms app, you may as well use the last option.įinally, that class shouldn't even know that the form exists, never mind the TextBox. or (C-cedilla) is a Latin script letter, used in the Albanian, Azerbaijani, Manx, Tatar, Turkish, Turkmen, Kurdish, Zazaki, and Romance alphabets.Romance languages that use this letter include Catalan, French, Friulian, Ligurian, Occitan, and Portuguese as a variant of the letter C. You'd have to either marshal a call to the UI thread, set the Timer's SynchronizingObject property or just using a instead. Secondly, you're using a and that will raise its Elapsed event on a background thread, which means that you cannot directly affect any controls because they are created on the UI thread. The C program is successfully compiled and executed with Microsoft Visual Studio. If I had a notebook and you wanted to write something on it, do you think that it would be useful to go and buy a new notebook of the same type and write on that? Of course not, so why should it work for forms? Firstly, there's no use creating a new Form1 object inside your class because anything you do to that will have no effect on the existing instance.