Delete Datalist row with multiple primary keys

gridView.DataKeys[rowNum][dataKeyName]

<asp:GridView ID="gridView" runat="server" DataKeyNames="userid, id1, id2, id3" OnRowDeleting="gridView_RowDeleting">

protected void gridView_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
    gridView.DataKeys[e.RowIndex]["userid"]...
    gridView.DataKeys[e.RowIndex]["id1"]...
    gridView.DataKeys[e.RowIndex]["id2"]...
    gridView.DataKeys[e.RowIndex]["id3"]...
}