Adding a RadContextMenu to a Command Button in RadGridView

Out-of-the-box, the RadGridView does a really good job of manking context menus in the RadGridView a simple process by handling the ContextMenuOpening event handler.

If however you have a GridViewCommandColumn in your RadGridView and you want to add a context menu to your command button, then the ContextMenuOpening event doesn't fire for this, as the command button is a RadButtonElement inside the CellElement.

it is though, quite a simple process to add a RadContextMenu to a command button.

• Subscribe to the CellFormatting event and add a MouseDown event handler on the command button

    Private Sub RadGridView1_CellFormatting(ByVal sender As System.Object,

                                            ByVal e As Telerik.WinControls.UI.CellFormattingEventArgs) Handles RadGridView1.CellFormatting

        If TypeOf e.CellElement Is GridCommandCellElement Then

            If e.CellElement.Tag Is Nothing Then

                AddHandler CType(e.CellElement, GridCommandCellElement).CommandButton.MouseDown, AddressOf Button_MouseDown

            End If

            e.CellElement.Tag = True

        End If

    End Sub

• Handle the MouseDown event, and create your context menu

    Private Sub Button_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)

        If e.Button = MouseButtons.Right Then

            Dim menu As New RadContextMenu()

            Dim item1 As New RadMenuItem("Menu Item 1")

            RemoveHandler item1.Click, AddressOf Item_Click

            AddHandler item1.Click, AddressOf Item_Click

            menu.Items.Add(item1)

            menu.Show(Control.MousePosition)

        Else

            MyBase.OnMouseDown(e)

        End If

    End Sub

• And lastly, handle the click of the context menu

    Private Sub Item_Click(ByVal sender As Object, ByVal e As EventArgs)

MessageBox.Show("You clicked the item menu in row: " & Me.RadGridView1.CurrentRow.Index.ToString() &

       " cell: " & Me.RadGridView1.CurrentColumn.Index.ToString())

    End Sub