TreeView Self-reference hierarchy

[jean michel]

Hello,

I Implemented this example populated from a database. But when inserting an item in the TreeView from an item of the ListBox DragAndDrop The TreeView is not updated. The list that loads the Treeview is of the type ObservableCollection

Loaded:

 protected void RadHierarquia_Loaded()
        {
            ObservableCollection<IHierarquico> hierarquia = new ObservableCollection<IHierarquico>();
            HierarquicoCollection lHierarquia = new HierarquicoCollection();

            foreach (IHierarquico item in hierarquia)
            {
                lHierarquia.Add(item);
            }

            RadHierarquia.DataContext = lHierarquia;
        }

ListBox to Treeview

 private void OnDropInfo(object sender, DragDropEventArgs e)
        {

            if (statusDrag == 1)
            {
                var destinationItem = e.Options.Destination as Telerik.Windows.Controls.RadTreeViewItem;
                var papeis = meusPapeisBox.SelectedItems.Cast<DtoPapel>().ToList();//e.Options.Payload as IList<DtoPapel>;

                if (papeis == null && e.Options.Payload is DtoPapel)
                {
                    papeis = new List<DtoPapel>() { e.Options.Payload as DtoPapel };
                }

                if (e.Options.Status == DragStatus.DropComplete)
                {
                    if (destinationItem != null && papeis != null)
                    {
                        foreach (var item in papeis)
                        {
                            HierarquicoData hData = destinationItem.Item as HierarquicoData;

                            DtoHierarquiaEstrutura obHierarquia = new DtoHierarquiaEstrutura();
                            obHierarquia.IdEstruturaPai = hData.Id;
                            obHierarquia.IdAgrupamento = hData.IdPai;
                            obHierarquia.Papel = item;

                            lHierarquia.Add(obHierarquia);

                            destinationItem.IsExpanded = true;

                            statusDrag = 0;


                        }

                        //foreach (Telerik.Windows.Controls.RadTreeViewItem itens in RadHierarquia.Items)
                        //{
                        //    LoadTreeView(itens);
                        //}


                        e.Handled = true;

                    }
                }
            }
            else
            {
                return;
            }


        }

Thanks.

[Bobi]

Hello jean michel,

Is it possible to send us some sample code or explain in more details the structure of your application in order to reproduce and fix this issue?

Best wishes,
Bobi
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[jean michel]

Hello Bobi,

The structure is the following one: The HierarquicoData class inherits the IHierarquico interface of the DtoEstruturaHierarquica class. The HierarquicoCollection class inserts in the list objects of the HierarquicoData type. E the HierarchyConverter creates the structure of the tree.

HierarquicoData:

public class HierarquicoData : INotifyPropertyChanged, IComparable<HierarquicoData>, IEquatable<HierarquicoData>
    {

        readonly IHierarquico _item;

        public HierarquicoData(IHierarquico data)
        {
            _item = data;
        }

        public HierarquicoData()
        {
        }

        public IHierarquico Decorated
        {
            get { return _item; }
        }

        public HierarquicoCollection Owner
        {
            get;
            set;
        }

        public string Descricao
        {
            get { return _item.Descricao; }
        }

        public string Imagem
        {
            get { return _item.Imagem; }
        }

        #region INotifyPropertyChanged Members

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string propertyName)
        {
            if (!string.IsNullOrEmpty(propertyName) &&
                PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        #endregion
}

DtoHierarquicoEstrutura

 public class DtoHierarquiaEstrutura : DtoBase, IIdentificavel<DtoPapel>, IIdentificavel<DtoHierarquiaAgrupamento>, IHierarquico, INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        private Boolean _ativo;
        private Int32 _exclusao;
        private Int32? _idEstruturaPai;
        private DtoPapel _papel;
        private Int32? _idAgrupamento;

        public Boolean Ativo
        {
            get
            {
                return this._ativo;
            }
            set
            {
                if (this._ativo != value)
                {
                    this._ativo = value;
                    OnPropertyChanged("Ativo");
                }
            }
        }
        public Int32 Exclusao
        {
            get
            {
                return this._exclusao;
            }
            set
            {
                if (this._exclusao != value)
                {
                    this._exclusao = value;
                    OnPropertyChanged("Exclusao");
                }
            }
        }


        public Int32? IdAgrupamento
        {
            get
            {
                return this._idAgrupamento;
            }
            set
            {
                if (this._idAgrupamento != value)
                {
                    this._idAgrupamento = value;
                    OnPropertyChanged("IdAgrupamento");
                }
            }
        }

        public DtoPapel Papel
        {
            get
            {
                return this._papel;
            }
            set
            {
                if (this._papel != value)
                {
                    this._papel = value;
                    OnPropertyChanged("Papel");
                }
            }
        }

        public Int32? IdEstruturaPai
        {
            get
            {
                return this._idEstruturaPai;
            }
            set
            {
                if (this._idEstruturaPai != value)
                {
                    this._idEstruturaPai = value;
                    OnPropertyChanged("CodEstruturaPai");
                }
            }
        }


        int IIdentificavel<DtoPapel>.Id
        {
            get
            {
                return Id;
            }
        }

        int IIdentificavel<DtoHierarquiaAgrupamento>.Id
        {
            get
            {
                return Id;
            }
        }



        protected virtual void OnPropertyChanged(string propertyName)
        {
            if (!string.IsNullOrEmpty(propertyName) &&
                PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }

        #region IHierarquico Members

        int IHierarquico.Id
        {
            get { return Id; }
        }

        int? IHierarquico.IdPai
        {
            get { return this.IdEstruturaPai; }
        }

        int? IHierarquico.IdAgrupamento
        {
            get { return this.IdAgrupamento; }
        }

        string IHierarquico.Descricao
        {
            get { return Papel.Nome; }
        }

        string IHierarquico.Imagem
        {
            get { return Papel.DescricaoImagem; }
        }


        #endregion
    }

XAML.cs

public partial class EstruturaHierarquica : UserControl
    {

        #region Globais

        ObservableCollection<DtoPapel> meusPapeis, todosIcones = new ObservableCollection<DtoPapel>();
        ObservableCollection<IHierarquico> hierarquia = new ObservableCollection<IHierarquico>();
        HierarquicoCollection lHierarquia = new HierarquicoCollection();
        DtoPapel payload = new DtoPapel();
        DtoPapel iconeSelecionado = new DtoPapel();
        DtoPapel papelSelecionadoOrigem = new DtoPapel();
        Brush listBoxDragPossible = new SolidColorBrush(Colors.Orange);
        List<DtoPapel> auxiliar = new List<DtoPapel>();
        string nomeAgrup, auxNomeAgrup = "Novo Agrupamento";
        int num, statusRequest = 0, statusSalvar, statusDrag = 0;

        #endregion

        #region EstruturaHierarquica

        public EstruturaHierarquica()
        {
            InitializeComponent();

            //Abre request para a controller
            OpenWebClient();

            //Evento do botão direito do mouse
            //Telerik.Windows.EventManager.RegisterClassHandler(typeof(Telerik.Windows.Controls.RadMenuItem), Telerik.Windows.Controls.RadMenuItem.ClickEvent, new RoutedEventHandler(OnMenuItemClicked), true);

            Telerik.Windows.Input.Mouse.AddMouseDownHandler(this, OnRightMouseButtonUp);

            RadDragAndDropManager.AddDragQueryHandler(this.meusPapeisBox, OnDragQuery);
            RadDragAndDropManager.AddDropInfoHandler(this.RadHierarquia, OnDropInfo);
            TraduzirTreeView();

        }
  #region wcRetornaHierarquiaEstrutura_OpenReadCompleted
        void wcRetornaHierarquiaEstrutura_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
        {

            DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(List<DtoHierarquiaEstrutura>));
            List<DtoHierarquiaEstrutura> hierarquicoEstrutura = new List<DtoHierarquiaEstrutura>(serializer.ReadObject(e.Result) as List<DtoHierarquiaEstrutura>);
            hierarquicoEstrutura.ForEach(row => hierarquia.Add(row));

            RadHierarquia_Loaded();


        }
        #endregion

#region RadHierarquia_Loaded

        protected void RadHierarquia_Loaded()
        {
            foreach (IHierarquico item in hierarquia)
            {
                HierarquicoData data = new HierarquicoData(item);
                lHierarquia.Add(data);
            }

            RadHierarquia.DataContext = lHierarquia;
        }

        #endregion

 #region OnDropInfo
        private void OnDropInfo(object sender, DragDropEventArgs e)
        {

            if (statusDrag == 1)
            {
                var destinationItem = e.Options.Destination as Telerik.Windows.Controls.RadTreeViewItem;
                var papeis = meusPapeisBox.SelectedItems.Cast<DtoPapel>().ToList();//e.Options.Payload as IList<DtoPapel>;
                Telerik.Windows.Controls.DropPosition dropPosition = destinationItem.DropPosition;
                int dropIndex = destinationItem.Index;

                Telerik.Windows.Controls.ItemsControl parentControl = Telerik.Windows.Controls.ItemsControl.ItemsControlFromItemContainer(destinationItem);


                if (papeis == null && e.Options.Payload is DtoPapel)
                {
                    papeis = new List<DtoPapel>() { e.Options.Payload as DtoPapel };
                }

                if (e.Options.Status == DragStatus.DropComplete)
                {
                    if (destinationItem != null && papeis != null)
                    {
                        foreach (var item in papeis)
                        {

                            HierarquicoData hData = destinationItem.Item as HierarquicoData;

                            DtoHierarquiaEstrutura obHierarquia = new DtoHierarquiaEstrutura();
                            obHierarquia.IdEstruturaPai = hData.Decorated.Id;
                            obHierarquia.IdAgrupamento = hData.Decorated.Id;
                            obHierarquia.Papel = item;


                            hierarquia.Add(obHierarquia);

                            HierarquicoData data = new HierarquicoData(obHierarquia);
                            lHierarquia.Add(data);

                            RadHierarquia.DataContext = lHierarquia;

                            destinationItem.IsExpanded = true;

                            statusDrag = 0;

                        }


                        //foreach (Telerik.Windows.Controls.RadTreeViewItem itens in RadHierarquia.Items)
                        //{
                        //    LoadTreeView(itens);
                        //}

                        e.Handled = true;

                    }
                }
            }
            else
            {
                return;
            }


        }
        #endregion

Obs:

I identified that when I set the RadHierarquia.DataContext property in the RadHierarquia_Loaded event is invoked the HierarquicoCollection class, however in the OnDropInfo event when I set the same property do not occur nothing.

[Bobi]

Hello jean michel,

We provided a sample projects for your ticket : 304817.
Please take a look at the examples. I hope that they will be helpful.

Best wishes,
Bobi
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

[jean michel]

Hello,

Where I make download of this project?

 Thanks!!!

[Tina Stancheva]

Hi jean michel,

You can download the examples from here:http://www.telerik.com/community/forums/silverlight/treeview/treeview-and-listbox-draganddrop.aspx

Let us know how it goes.

All the best,
Tina Stancheva
the Telerik team

Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.