添加项目文件。

DotNet.RevitUI/RevitCommandInvoke.cs

@@ -0,0 +1,53 @@
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Autodesk.Revit.Attributes;
+using System.Threading.Tasks;
+
+namespace DotNet.RevitUI.Helper
+{
+    /// <summary>
+    /// Revit命令帮助.
+    /// </summary>
+
+    [Transaction(TransactionMode.Manual)]
+    class RevitCommandInvoke : IExternalCommand
+    {
+        public static Queue<ExecuteHandler> ExecuteHandlers { get; set; }
+
+        public static Queue<InvokeHandler> InvokeHandlers { get; set; }
+
+        static RevitCommandInvoke()
+        {
+            ExecuteHandlers = new Queue<ExecuteHandler>();
+
+            InvokeHandlers = new Queue<InvokeHandler>();
+        }
+
+        Result IExternalCommand.Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
+        {
+            while (ExecuteHandlers.Count > 0)
+            {
+                var first = ExecuteHandlers.Dequeue();
+
+                first(commandData, ref message, elements);
+            }
+
+            while (InvokeHandlers.Count > 0)
+            {
+                var first = InvokeHandlers.Dequeue();
+
+                first(commandData.Application);
+            }
+
+            return Result.Succeeded;
+        }
+    }
+
+    delegate Result ExecuteHandler(ExternalCommandData commandData, ref string message, ElementSet elements);
+
+    delegate void InvokeHandler(UIApplication uiApp);
+}