Change the visibility of shapes

Show shapes

To display multiple shapes, use the ShowShapes method of the IDiagram object.

public void ShowShapes(ICommandContext c, ICommandParams p) 
{ 
//Get the currently displayed diagram 
IDiagram diagram = c.App.Workspace.CurrentEditor as IDiagram; 
if (diagram == null) 
{ 
//If the diagram is not displayed, exit the process 
c.App.Output.WriteLine("sample", "Diagram is not displayed."); 
return; 
} 

//Get the shapes present in the diagram 
INodeCollection nodes = diagram.Nodes; 
if (!nodes.Any()) 
{ 
//If there are no nodes on the diagram, exit the process 
c.App.Output.WriteLine("sample", "There are no shapes on the currently displayed diagram."); 
return; 
} 

//Show the shapes hidden on the diagram 
c.App.Output.WriteLine("sample", $"Show the shapes corresponding to the following models."); 
foreach (INode node in nodes.Where(n => !n.IsVisible)) 
{ 
c.App.Output.WriteLine("sample", $" - {node.Model.Name}"); 
//To show a single shape, use the ShowShape method of IDiagram. 
//diagram.ShowShape(node); 
} 
diagram.ShowShapes(nodes); 
} 

Hide shapes

To hide multiple shapes, use the HideShapes method of the IDiagram object.

public void HideShapes(ICommandContext c, ICommandParams p) 
{ 
//Get the currently displayed diagram 
IDiagram diagram = c.App.Workspace.CurrentEditor as IDiagram; 

//Get the currently selected shapes 
IEnumerable<INode> nodes = diagram.GetSelectedShapes().OfType<INode>(); 

//Hide shapes on the diagram 
c.App.Output.WriteLine("sample", $"Hide shapes corresponding to the following models"); 
foreach (INode node in nodes) 
{ 
c.App.Output.WriteLine("sample", $" - {node.Model.Name}"); 
//To hide a single shape, use the HideShape method of IDiagram. 
//diagram.HideShape(node); 
} 
diagram.HideShapes(nodes); 
} 

Note

You can also change the visibility of a shape using the SetVisible method of the IShape object, but if you are changing the visibility of multiple shapes, performance issues may occur. Therefore, consider using the ShowShapes and HideShapes methods of the IDiagram object.