Cant find contextmenuopening event for Listview

Hello, Shuvrangshu,

RadListView control doesn't offer the ContectMenuOpening event. In RadListView you can show a RadContextMenu when the mouse right button is pressed by using the MouseDown event or use the ItemMouseDown event when the user presses a mouse button over ListViewDataItem. More information is available here:
https://docs.telerik.com/devtools/winforms/controls/menus/contextmenu/context-menus 
https://docs.telerik.com/devtools/winforms/controls/menus/contextmenu/add-context-menu-in-code 

RadContextMenu offers a DropDownOpening event which occurs before the pop-up is shown and you have access to the items that are about to be shown.

I prepared an example for your reference where a context menu with one item "Delete" is shown when the user clicks with the right mouse button over the first data item in the list:

RadContextMenu contextMenu;
public RadForm1()
{
    InitializeComponent();

    contextMenu = new RadContextMenu();
    RadMenuItem menuItem = new RadMenuItem("Delete");
    contextMenu.Items.Add(menuItem);

    this.radListView1.ItemMouseDown += RadListView1_ItemMouseDown;
}

private void RadListView1_ItemMouseDown(object sender, ListViewItemMouseEventArgs e)
{
    if (e.OriginalEventArgs.Button == System.Windows.Forms.MouseButtons.Right && e.Item.Text == "ListViewItem 1")
    {
        contextMenu.Show(radListView1, e.OriginalEventArgs.X, e.OriginalEventArgs.Y);
    }
}

Feel free to extend this example to display different items depending on the item clicked.

I hope this helps. Should you have other questions do not hesitate to ask.

Regards,
Nadya
Progress Telerik