添加项目文件。

RevitTools.Utils/Revit/ExEventWorkItem.cs

@@ -0,0 +1,64 @@
+using Autodesk.Revit.UI;
+using System;
+using System.Threading.Tasks;
+
+namespace RevitTools.Utils.Revit
+{
+    /// <summary>
+    /// 外部事件工作项
+    /// </summary>
+    internal class ExEventWorkItem
+    {
+        /// <summary>
+        /// 异步阻塞信号
+        /// </summary>
+        public TaskCompletionSource<object> CompletionSource { get; protected set; }
+
+        /// <summary>
+        /// 在外部事件中执行的, 带有一个返回值的函数
+        /// </summary>
+        private Action<UIApplication> Action { get; set; }
+
+        /// <summary>
+        /// 在外部事件中执行的, 带有一个返回值的函数
+        /// </summary>
+        private Func<UIApplication, object> Func { get; set; }
+
+        /// <summary>
+        /// 执行外部事件函数
+        /// </summary>
+        /// <param name="application"></param>
+        public void InvokeAction(UIApplication application)
+        {
+            try
+            {
+                if (Action != null)
+                {
+                    Action.Invoke(application);
+                    this.CompletionSource.TrySetResult(null);
+                }
+                else
+                {
+                    var result = Func.Invoke(application);
+                    this.CompletionSource.TrySetResult(result);
+                }
+            }
+            catch (Exception ex)
+            {
+                this.CompletionSource.TrySetException(ex);
+            }
+        }
+
+        public ExEventWorkItem(Action<UIApplication> action)
+        {
+            this.CompletionSource = new TaskCompletionSource<object>();
+            this.Action = action;
+        }
+
+        public ExEventWorkItem(Func<UIApplication, object> action)
+        {
+            this.CompletionSource = new TaskCompletionSource<object>();
+            this.Func = action;
+        }
+    }
+}