DataBinding to Calculated Field

Question

I\'m running into a small problem where I\'m trying to bind a DataTextColumn of a DataGrid to a Calculated Field.

WPF

Answer 1

I'm assuming Student implements INotifyPropertyChanged. what you have to do is to register to the PropertyChanged Event for LodgingCosts + RegistrationCosts + TravelCosts + DiningCosts, and raise the PropertyChanged event for TotalCosts.

public partial class Student
{
    public Decimal TotalCosts
    {
        get { return (LodgingCosts + RegistrationCosts + TravelCosts + DiningCosts); }
    }

    public Student()
    {
        this.PropertyChanged += new PropertyChangedEventHandler(Student_PropertyChanged);
    }

    void Student_PropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        if (e.PropertyName == "LodgingCosts" ||
            e.PropertyName == "RegistrationCosts" ||
            e.PropertyName == "TravelCosts" ||
            e.PropertyName == "DiningCosts")
        {
            if (PropertyChanged != null)
                PropertyChanged(this, new PropertyChangedEventArgs("TotalCosts"));
        }
    }

}