Databinding a Custom Control

Question

I have a Custom Control (Windows Form) that is a lookup text box. A property on the Control is Current Selection which is a Custom Object containing "Identifier", "Code" and "Description". This property is Databound using a BindingSource.

Displaying the information works great. On the other hand regardless of whether I set the Update to OnValidate or OnValueChange it never updates the BindingSource. Is there something I'm missing to get this to auto update?

private System.Windows.Forms.BindingSource buildPlanComponentDataBindingSource;

    public void LoadBuildPlan(string itemNumber)
    {
        var buildPlanComponents = BuildPlan.LoadBuildPlanComponents(itemNumber, AutomaticPrice);
        buildPlanComponentDataBindingSource.DataSource = buildPlanComponents;
        AssemblyNumber = itemNumber;
    }




[Bindable(true)]
[DefaultValue(null)]
public ILookupSelection CurrentSelection
{
    get
    {
        if (currentSelection == null)
            currentSelection = new LookupSelection {Code = txtLookup.Text};

        return currentSelection;
    }

    set
    {
        if (value == null) return;

        currentSelection = value;

        SetText(currentSelection, DisplayText);
        SetDescription(currentSelection, DisplayDescription);
    }
}

Answer 1

Implementing INotifyPropertyChanged seems to be the solution!

    #region IPropertyChanged

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
    }

    protected virtual void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        if (null != PropertyChanged)
        {
            PropertyChanged(this, e);
        }
    }

    #endregion