Add a click event to a listbox filled with objects in code

Question

Hey guys,

I'm trying to sho a contextmenu on right-click on an item in a listbox. So i'm binding a list of "Users" to my listbox. Then i'm a bit lost. I thought i could foreach the list and add a mouserightdown event on the listboxitems, but i can't figure out how.

Is this a good way, or does anyone know a better way of accomplishing what i want.

Thanks in advance.

Answer 1

maybe you can get in the Mousdown Event from the Listbox, witch Item is selected. Or do you do the right click without have a item selected?

Answer 2

Been a while since I did this, but if I remember correctly:

• You should trigger the event on right-mouse-down
• Figure out the location of the cursor at that time
• Ask the listbox, which item sits at those coordinates.

The listbox does have a method for that I think...

Edit: Here, have some code:

    private void listBox1_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button != System.Windows.Forms.MouseButtons.Right)
            return;

        int index = listBox1.IndexFromPoint(e.X, e.Y);

        MessageBox.Show(listBox1.Items[index].ToString());

    }

Obviously, you need to add some error checking, if there is an item at that point etc.

Answer 3

This will work:

        private void listBox1_MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Right)
        {
            Point p = new Point(e.X, e.Y);
            listBox1.SelectedIndex = listBox1.IndexFromPoint(p);
            contextMenuStrip1.Show();
        }
    }

Edit: a bit too late sry ;)

Answer 4

This will answer your question I think:

http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/2c8f00ca-9c7d-4237-b2cf-f60911a008a9

Answer 5

You can do 2 things that may solve the problem you are experiencing :

1) If you use usercontrols to fill your listbox, you can add click events to it.

2) If you add a contextmenu to your listbox, right-clicking an item will automatically open the contextmenu, so you don't have to add a click event to it.