Cannot access non-static method in static context?

Question

Given this code....

public class CalibrationViewModel : ViewModelBase
{
    private FileSystemWatcher fsw;

    public CalibrationViewModel(Calibration calibrati         


        

Answer 1

If this is WPF, System.Windows.Threading.Dispatcher does not have a static BeginInvoke() method.

If you want to call that statically (this is, without having a reference to the Dispatcher instance itself), you may use the static Dispatcher.CurrentDispatcher property:

Dispatcher.CurrentDispatcher.BeginInvoke(...etc);

Be aware though, that doing this from a background thread will NOT return a reference to the "UI Thread"'s Dispatcher, but instead create a NEW Dispatcher instance associated with the said Background Thread.

A more secure way to access the "UI Thread"'s Dispatcher is via the use of the System.Windows.Application.Current static property:

Application.Current.Dispatcher.BeginInvoke(...etc);