Question

In the code below, i can only filter based on the Surname column in my table, can i filter using more than one table column?

ICollectionView view = CollectionViewSource.GetDefaultView(EmployeeView.ItemsSource);
        view.Filter = m => ((EmployeeMaster)m).Surname.ToLower().Contains(TextBoxSearch.Text.ToLower());

Answer 1

You could try combining the conditions via && or || operators, like this:

ICollectionView view = CollectionViewSource.GetDefaultView(EmployeeView.ItemsSource); 
view.Filter = m => ((EmployeeMaster)m).Surname.ToLower().Contains(TextBoxSearch.Text.ToLower()) || ((EmployeeMaster)m).Name.ToLower().Contains(TextBoxSearch.Text.ToLower());