Show diagram

This is an example of switching the view of the active model editor to the ER diagram.

public void ShowDiagram(ICommandContext c, ICommandParams p) 
{ 
IEditorView editorView = c.App.Window.EditorPage?.CurrentEditorView; 
if (editorView == null) { 
c.App.Window.UI.ShowMessageBox("Please display the model editor before executing."); 
return; 
} 

//If there is an ER diagram among the view that can be switched, display it. 
IEditorDefCollection views = editorView.ViewDefinitions; 
foreach (var view in views) 
{ 
if (view.Type.Equals("ERDiagram")) { 
editorView.SelectViewDefinition(view); 
break; 
} 
} 

//If the ER diagram cannot be displayed, display a message. 
if (! editorView.Editor.EditorType.Equals("ERDiagram")) { 
c.App.Window.UI.ShowMessageBox("There are no ER diagrams to switch to."); 
} 
}