Question

I have a single class called MyClass which is inheriting from ListView…so basically it is a list view and I can use it on a form,etc..I have overriden drag and drop events for this class so now if I put two of these controls on a form and drag items from one to the other, it will do it fine.
My problem is with DoubleClick, How can I implement DoubleClick() on this class? so when later I put two of these controls on a form and double click on a item on one of them, it will move it to the other control… Is it even possible?

Answer 1

I was curious how this could be achieved so I tried it. I created a new windows forms project and created a myClass:ListView(see code below) Then I added two if the Controls to the Form, and tied them together using the sister property (which I did not really write up as a property)

I added 1 item to myClass1 and 2 Items to myClass2. When I double click on anyof them, they move to the other listview.

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        myClass1.sister = myClass2;
        myClass2.sister = myClass1;
    }
}

public class myClass : ListView
{
    //This is where we will store the information about the sister Control
    private myClass _sister;
    //**EDIT**  I changed sister into a property and now it is selectable
    //from the designer.
    public myClass sister { get { return _sister; } set { _sister = value; } }

    public myClass()
    {
    }
    //here is where we override the OnDoubleCLick Event
    protected override void OnDoubleClick(EventArgs e)
    {
        //Make sure this control has a sister 
        if (sister != null)
        {
            //add a temporary storage location for the selected Item
            ListViewItem item = this.SelectedItems[0];
            //Remove the Item from the clicked List
            this.Items.Remove(item);
            //Add the Item to the sister List
            ((myClass)sister).Items.Add(item);
        }
        base.OnDoubleClick(e);
    }

}