添加项目文件。

WPFMonitorRevitAPI-master/WPFMonitorProgress/Modeless/ExternalEventMode.cs

@@ -0,0 +1,35 @@
+using Autodesk.Revit.UI;
+using System;
+using Autodesk.Revit.DB;
+using Autodesk.Revit.Attributes;
+using Autodesk.Revit.UI.Selection;
+
+namespace WPFMonitorProgress.Commands
+{
+    [Transaction(TransactionMode.Manual)]
+    class ExternalEventMode : IExternalCommand
+    {
+        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
+        {
+            UIDocument uidoc = commandData.Application.ActiveUIDocument;
+            Selection sel = uidoc.Selection;
+
+            try
+            {
+                Reference refer = sel.PickObject(ObjectType.Element, "Select a Wall");
+                Models.ChangeParameterModeless model = new Models.ChangeParameterModeless(uidoc.Document.GetElement(refer));
+
+                model.ProgressModeless();
+            }
+            catch (Exception e)
+            {
+                if (!(e is Autodesk.Revit.Exceptions.OperationCanceledException))
+                {
+                    message = e.Message;
+                    return Result.Failed;
+                }
+            }
+            return Result.Succeeded;
+        }
+    }
+}