Question

I am new with LightSwitch.
I’m trying to catch event when a checkbox control is being checked.
In the creation of the screen I wrote :

 partial void CreateNewEmployee_Created()
    {
        this.EmployeeProperty.Contractors = new Contractor();

        Dispatchers.Main.BeginInvoke(() =>
            {
                ((INotifyPropertyChanged) this.EmployeeProperty).PropertyChanged +=
                 new PropertyChangedEventHandler(CreateNewEmployee_PropertyChanged);

            });
    }

and handling the event in CreateNewEmployee_PropertyChanged

    private void CreateNewEmployee_PropertyChanged(object sender, PropertyChangedEventArgs e)
    {
        if(this.EmployeeProperty.IsContractor)
        {

            this.EmployeeProperty.Contractors = new Contractor();
        }
    }

I’m getting the excpetion in

this.EmployeeProperty.Contractors = new Contractor();

The exception is

A new instance of the EntityObject class cannot be initialized because
the ambient IDataWorkspace is not available. Please use the
constructor that specifies an EntitySet.

Thanks

Answer 1

Shouldn’t you be using the AddNew() method

var c = this.EmployeeProperty.Contractors.AddNew()