Add a right-click menu for The listbox and listview controls

In fact, the two controls are the same in implementation, or they are completely the same. Below I will only use the listview control as an example.

This right-click event is written in the listview event. For example, the mouseover mousedown mouseup event can all be in the following forms:

Private void listviewdomainmousedown (object sender, MouseEventArgs e)
{
If (e. Button = MouseButtons. Right)
{

ContextMenuStrip1.Show (MousePosition); // or contextMenuStrip1.Show (listView1, new Point (e. X, e. Y ));

If (listView1.SelectedItems. Count = 0)
{
Download ToolStripMenuItem. Enabled = false;

}
Else
{
Download ToolStripMenuItem. Enabled = true;

}
}
}