ListBoxes using same context menu with different items, On ListBox Click event

Question

I have 3 listboxes and on MouseDown event i want them to show same context menu but there items would differ on every different listbox click. For example:

- contextMenu when clicked on :listBox1 
    *  should show: {Edit,Add Items}
- contextMenu when clicked on :listBox2
    *  should show: {Remove, Add Price}
- contextMenu when clicked on :listBox3
    *  should show: {something, Remove}

Following is the code i am using for listBox1:

    private void MouseDown(object sender, MouseEventArgs e)
    {
        if (e.Button == MouseButtons.Right)
        {
            listBx_1.SelectedIndex = listBx_1.IndexFromPoint(e.Location);
            if (listBx_1.SelectedIndex != -1)
            {
                listboxContextMenu_Opening();
            }
        }
    }

    private void listboxContextMenu_Opening()
    {
        listboxContextMenu.Items.Clear();
        listboxContextMenu.Items.Add("Edit");
        listboxContextMenu.Items.Add("Add Items");
    }

Now i want listBox2 and listBox3 context menu(same menu for all three listBoxes) items to be added using MouseDown event , How could i achieve that? Suggestions are Welcomed!!

Why do they all need to be the same menu? You clearly have three different menus, so it makes sense to give each ListBox its own custom menu. — Brian Kintz
Ok lets consider i have three different contextMenu for them now if i want same MouseDown event(defined above) to be called on three different listBox click. then how should change my code in MouseDown event?? — Sadiq
You would just create three individual MouseDown Event Handlers and assign one to each ListBox — Brian Kintz

Chibueze Opata Chibueze Opata · Accepted Answer · 2013-07-18T10:12:13

It is much better to create 3 separate listbox ContextMenus. That way you won't need to watch for MouseDown.

But you can achieve this by dynamically editing their ContextMenu on MouseDown.

Create a ContextMenu with all the items and have the following in your MouseDown. Then assign all their MouseDown events to MouseDown.

private void MouseDown(object sender, MouseEventArgs e)
{
    ListBox l = (ListBox) sender;
    if (e.Button == MouseButtons.Right)
    {
        l.SelectedIndex = l.IndexFromPoint(e.Location);
        if (l.SelectedIndex != -1)
        {
            if (l.Name == "listBox1")
            {
                listboxContextMenu.Items.Clear();
                listboxContextMenu.Items.Add("Edit");
                listboxContextMenu.Items.Add("Add Items");
            }
            else if(l.Name = "listBox2")//etc
        }
    }
}

ListBoxes using same context menu with different items, On ListBox Click event

1 Answers