BrightIdeasSoftware.VirtualObjectListView.CreateGroups C# (CSharp) Метод

        protected override void CreateGroups(IEnumerable<OLVGroup> groups)
        {
            // In a virtual list, we cannot touch the Groups property.
            // It was obviously not written for virtual list and often throws exceptions.

            NativeMethods.ClearGroups(this);

            this.EnableVirtualGroups();

            foreach (OLVGroup group in groups) {
                System.Diagnostics.Debug.Assert(group.Items.Count == 0, "Groups in virtual lists cannot set Items. Use VirtualItemCount instead.");
                System.Diagnostics.Debug.Assert(group.VirtualItemCount > 0, "VirtualItemCount must be greater than 0.");

                group.InsertGroupNewStyle(this);
            }
        }