添加项目文件。

Szmedi.RvKits/Display/CategoryDisplayCmd.cs

@@ -0,0 +1,42 @@
+
+using Autodesk.Revit.Attributes;
+using Autodesk.Revit.DB;
+
+using Nice3point.Revit.Toolkit.External;
+
+using System.Windows;
+
+using System.Windows.Interop;
+
+using Szmedi.RvKits.Assists;
+
+namespace Szmedi.RvKits.DisplayTools
+{
+    /// <summary>
+    /// Revit执行命令
+    /// </summary>
+    [Transaction(TransactionMode.Manual)]
+
+    public class CategoryDisplayCmd : ExternalCommand
+    {
+        public override void Execute()
+        {
+            if (Document.ActiveView.ViewTemplateId != ElementId.InvalidElementId)
+            {
+                MessageBox.Show("当前视图已应用视图样板，无法修改可见性", "提示", MessageBoxButton.OK, MessageBoxImage.Exclamation);
+                return;
+            }
+            if (WinIntPtr.IsVisible("类别显示"))
+            {
+                WinIntPtr.ShowAndActive("类别显示");
+            }
+            else
+            {
+                CategoryDisplayWin visibilityWin = new(UiApplication);
+                new WindowInteropHelper(visibilityWin).Owner = System.Diagnostics.Process.GetCurrentProcess().MainWindowHandle;
+
+                visibilityWin.Show();
+            }
+        }
+    }
+}