C# TreeGridNode类代码示例

		public TreeGridView ReturnHierarchy(object currObj, string classname)
		{
			InitializeImageList();
			TreeGridView treegrid = InitializeTreeGridView();

			try
			{
				TreeGridNode rootNode = new TreeGridNode();
				treegrid.Nodes.Add(rootNode);

				IReflectClass rclass = DataLayerCommon.ReflectClassForName(classname);
				IType type = ResolveType(rclass);

				rootNode.Cells[0].Value = AppendIDTo(type.FullName, GetLocalID(currObj), type);
				rootNode.Cells[1].Value = ClassNameFor(currObj.ToString());
				SetFieldType(rootNode, type);
				rootNode.Tag = currObj;
				rootNode.Cells[1].ReadOnly = true;
				rootNode.Expand();
				rootNode.ImageIndex = 0;
				classname = DataLayerCommon.RemoveGFromClassName(classname);

				TraverseObjTree(ref rootNode, currObj, classname);
			}
			catch (Exception oEx)
			{
				LoggingHelper.HandleException(oEx);
			}
			return treegrid;
		}

        private TreeGridNode SetObjectToNode(TreeGridNode parent, string key, IDictionary value, string path)
        {
            TreeGridNode node = SetValueToNode(parent, key, string.Empty, "D", path);

            AddNodeToGrid(node, value, path);
            return node;
        }

        public TreeGridView()
		{
            try
            {
                rOpen = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Opened);
                rClosed = new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Closed);
            }
            catch (Exception)
            {
                rOpen = null;
                rClosed = null;
            }

			// Control when edit occurs because edit mode shouldn't start when expanding/collapsing
			this.EditMode = DataGridViewEditMode.EditProgrammatically;
            this.RowTemplate = new TreeGridNode() as DataGridViewRow;
			// This sample does not support adding or deleting rows by the user.
			this.AllowUserToAddRows = false;
			this.AllowUserToDeleteRows = false;
			this._root = new TreeGridNode(this);
			this._root.IsRoot = true;

			// Ensures that all rows are added unshared by listening to the CollectionChanged event.
			base.Rows.CollectionChanged += delegate(object sender, System.ComponentModel.CollectionChangeEventArgs e){};
        }

        private TreeGridNode SetArrayToNode(TreeGridNode parent, string key, IList value, string path)
        {
            TreeGridNode node = SetValueToNode(parent, key, string.Empty, "A", path);

            int index = 0;
            foreach (var item in value)
            {
                CreateNode(node, Convert.ToString(index), item, path + "[" + Convert.ToString(index++) + "]");
            }
            return node;
        }

 private TreeGridNode SetValueToNode(TreeGridNode parent, string key, object value, string type, string path)
 {
     if (parent != null)
     {
         return parent.Nodes.Add(key, value, type, path);
     }
     else
     {
         return _view.AddNodeToGrid(key, value, type, path);
     }
 }

		private void PopulateNode(TreeGridNode rootNode, ProxyTreeGridRenderer item)
		{
		    rootNode.Cells[0].Value = item.DisplayFieldName;
            rootNode.Cells[0].Tag  = item.QualifiedName ;
			rootNode.Cells[1].Value = item.FieldValue;
            rootNode.Cells[1].Tag = item.FieldName ;
			rootNode.Cells[2].Value = item.FieldType;
			rootNode.Cells[2].Tag = item.ObjectType;
			rootNode.Tag = item.ObjectId;
			rootNode.Cells[1].ReadOnly = item.ReadOnlyStatus;
		}

		public void AddNodesToTreeview(TreeGridNode node, bool activate)
		{
			List<ProxyTreeGridRenderer> proxyList =
				AssemblyInspectorObject.DataPopulation.ExpandTreeGidNode
					(OMEInteraction.GetCurrentConnParams().ConnectionReadOnly,
					 node.Tag, activate);
			if (proxyList == null)
				return;

			foreach (ProxyTreeGridRenderer item1 in proxyList)
			{
				PopulateTreeGridNode(node, item1);
			}
		}

 private TreeGridNode CreateNode(TreeGridNode parent, string key, object value, string path)
 {
     if (IsObject(value))
     {
         return SetObjectToNode(parent, key, value as IDictionary, path);
     }
     else if (IsArray(value))
     {
         return SetArrayToNode(parent, key, (IList)value, path);
     }
     else
     {
         return SetValueToNode(parent, key, value, "V", path);
     }
 }

		private void PopulateTreeGridNode(TreeGridNode rootNode, ProxyTreeGridRenderer NodeDetails)
		{
			TreeGridNode node = new TreeGridNode();
			rootNode.Nodes.Add(node);
			PopulateNode(node, NodeDetails);
			node.ImageIndex = 0;
			node.Collapse();
			if (NodeDetails.HasSubNode || NodeDetails.ObjectId != 0)
			{
				TreeGridNode treenodeDummyChildNode = new TreeGridNode();
				node.Nodes.Add(treenodeDummyChildNode);
				treenodeDummyChildNode.Cells[0].Value = BusinessConstants.DB4OBJECTS_DUMMY;
				if (NodeDetails.HasSubNode && NodeDetails.ObjectId == 0)
					node.Tag = NodeDetails.SubObject;
			}
		}

        //internal VisualStyleRenderer rOpen;             //= new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Opened);
        //internal VisualStyleRenderer rClosed;           //= new VisualStyleRenderer(VisualStyleElement.TreeView.Glyph.Closed);

        #region Constructor
        public TreeGridView()
		{
			// Control when edit occurs because edit mode shouldn't start when expanding/collapsing
			this.EditMode = DataGridViewEditMode.EditProgrammatically;
            this.RowTemplate = new TreeGridNode() as DataGridViewRow;
			// This sample does not support adding or deleting rows by the user.
			this.AllowUserToAddRows = false;
			this.AllowUserToDeleteRows = false;
			this._root = new TreeGridNode(this);
			this._root.IsRoot = true;

			// Ensures that all rows are added unshared by listening to the CollectionChanged event.
			base.Rows.CollectionChanged += delegate(object sender, System.ComponentModel.CollectionChangeEventArgs e){};

            this.ColumnHeadersDefaultCellStyle.BackColor = Color.FromArgb(210, 163, 119);
            this.EnableHeadersVisualStyles = false;//for gridheader color tobe effective.
        }

		public TreeGridView RenderTreeGridViewDetails(long id, string classname)
		{
			InitializeImageList();
			treegrid = InitializeTreeGridView();
			bool readOnly=OMEInteraction.GetCurrentConnParams().ConnectionReadOnly;
			ProxyTreeGridRenderer item = AssemblyInspectorObject.DataPopulation.GetTreeGridViewDetails(readOnly,id, classname);
			TreeGridNode rootNode = new TreeGridNode();
			treegrid.Nodes.Add(rootNode);
			PopulateNode(rootNode, item);
			rootNode.Expand();
			rootNode.ImageIndex = 0;
			List<ProxyTreeGridRenderer> proxyList = AssemblyInspectorObject.DataPopulation.TransverseTreeGridViewDetails(readOnly,id,classname);
            foreach (ProxyTreeGridRenderer item1 in proxyList)
			{
				PopulateTreeGridNode(rootNode, item1);
			}

			return treegrid;
		}

        public TreeGridView()
		{
            this.SetStyle(ControlStyles.CacheText |
                ControlStyles.AllPaintingInWmPaint |
                ControlStyles.UserPaint |
                ControlStyles.OptimizedDoubleBuffer |
                ControlStyles.Opaque, true);

			// Control when edit occurs because edit mode shouldn't start when expanding/collapsing
			this.EditMode = DataGridViewEditMode.EditProgrammatically;
            this.RowTemplate = new TreeGridNode() as DataGridViewRow;
			// This sample does not support adding or deleting rows by the user.
			this.AllowUserToAddRows = false;
			this.AllowUserToDeleteRows = false;
			this._root = new TreeGridNode(this);
			this._root.IsRoot = true;
            
           
            SetDefaultProperties();
			// Ensures that all rows are added unshared by listening to the CollectionChanged event.
			base.Rows.CollectionChanged += delegate(object sender, System.ComponentModel.CollectionChangeEventArgs e){};
        }

        private void AddNodeToGrid(TreeGridNode parent, object nodes, string path)
        {
            IDictionary dict = nodes as IDictionary;

            if (dict != null)
            {
                foreach (var node in dict.Keys)
                {
                    TreeGridNode tnode = CreateNode(parent, node.ToString(), dict[node], path + "." + node.ToString());
                }
            }

            IList list = nodes as IList;

            if (list != null)
            {
                int index = 0;
                foreach (var item in list)
                {
                    TreeGridNode tnode = CreateNode(parent, Convert.ToString(index), item, path + "[" + Convert.ToString(index++) + "]");
                }
            }
        }

 protected internal virtual void SiteNode(TreeGridNode node, int index)
 {
     if (index < base.Rows.Count)
     {
         base.Rows.Insert(index, node);
     }
     else
     {
         // for the last item.
         base.Rows.Add(node);
     }
 }

        protected internal virtual bool ExpandNode(TreeGridNode node)
        {
            if (!node.IsExpanded || this._virtualNodes)
            {
                ExpandingEventArgs exp = new ExpandingEventArgs(node);
                this.OnNodeExpanding(exp);

                if (!exp.Cancel)
                {
                    this.LockVerticalScrollBarUpdate(true);
                    this.SuspendLayout();
                    _inExpandCollapse = true;
                    node.IsExpanded = true;

                    //TODO Convert this to a InsertRange
                    foreach (TreeGridNode childNode in node.Nodes)
                    {
                        Debug.Assert(childNode.RowIndex == -1, "Row is already in the grid.");

                        this.SiteNode(childNode);
                        //this.BaseRows.Insert(rowIndex + 1, childRow);
                        //TODO : remove -- just a test.
                        //childNode.Cells[0].Value = "child";
                    }

                    ExpandedEventArgs exped = new ExpandedEventArgs(node);
                    this.OnNodeExpanded(exped);
                    //TODO: Convert this to a specific NodeCell property
                    _inExpandCollapse = false;
                    this.LockVerticalScrollBarUpdate(false);
                    this.ResumeLayout(true);
                    this.InvalidateCell(node.Cells[0]);
                }

                return !exp.Cancel;
            }
            else
            {
                // row is already expanded, so we didn't do anything.
                return false;
            }
        }