Question

I am trying to make a program that has a data grid that shows on each row, List of Ingredients the pizza has, the pizza name, and the price of the pizza. I can get the data grid to show the name and price, but i am having trouble getting it to show the list of ingredients. The data grid’s datasource is a binding list of a class called Pizza.

    class Pizza
{
    private List<Ingredients> ingredientList_;
    private string pizzaName_;
    private decimal retailPrice_;

    public Pizza(List<Ingredients> ingredientList, string pizzaName, decimal retailPrice)
    {
        ingredientList_ = ingredientList;
        pizzaName_ = pizzaName;
        retailPrice_ = retailPrice;
    }

It has the basic get and set properties.
I also have an Ingredient class.

    class Ingredients
{
    private string name_;
    private int servingSize_;
    private int energyValue_;
    private decimal purchasePrice_;
    private bool isVegetarian_;

    public Ingredients(string name, int servingSize, int energyValue, decimal purchasePrice, bool isVegetarian)
    {
        name_ = name;
        servingSize_ = servingSize;
        energyValue_ = energyValue;
        purchasePrice_ = purchasePrice;
        isVegetarian_ = isVegetarian;
    }

Has the basic get and set properties.

In my form code, I have:

    private BindingList<Pizza> pizzaList_;


    pizzaList_ = new BindingList<Pizza>();
        dataGridViewPizzaMenu.DataSource = pizzaList_;

Now my problem is that i am trying to use a combo box column to show the ingredients in a pizza when i click on it. But i can’t seem to create a bound column for the Ingredients, only the pizza name and pizza price. Am i missing something or is what i am trying to do not possible?

Answer 1

Everything you’ve done appears correct. The problem I think is the way the DataGridView is setup at Design or Runtime.

If you head over to this answer you can see the steps you need to take:
Add all elements of array to datagridview rows except one

• The trick with binding the 1st combobox column is a BindingSource. In design time > right click on the DataGridView > choose Edit Columns > select the first column > choose DataSource > click Add Project DataSource > choose Object > then tick the Ingredients class and click Finish.

• Remeber to set the 1st ComboBox columns DataMember to ingredientList, you will need to select the IngredientsDataBindingSource control that was added (slightly below the Form Design’s surface – in the gray area)

• 2nd and 3rd add two TextBox columns for pizzaName and retailPrice and set there DataPropertyName accordingly.

---

 pizzaList_ = new BindingList<Pizza>();
 //Insert code to populate the List of Pizza's and Ingredients
 dataGridViewPizzaMenu.AutoGenerateColumns = false;
 dataGridViewPizzaMenu.DataSource = pizzaList_;
 ingredientsDataBindingSource.DataSource = pizzaList_.ingredientsList_;    

ps There is a downloadable sample in the link I referred to above.