添加项目文件。

RevitTools.Utils/Revit/ExEventUtils.cs

@@ -0,0 +1,78 @@
+using Autodesk.Revit.UI;
+using System;
+using System.Collections.Concurrent;
+using System.Threading.Tasks;
+
+namespace RevitTools.Utils.Revit
+{
+    /// <summary>
+    /// 外部事件封装类
+    /// </summary>
+    public class ExEventUtils
+    {
+        /// <summary>
+        /// 创建外部事件
+        /// </summary>
+        /// <param name="handleName"></param>
+        private ExEventUtils(string handleName)
+        {
+            this.Handle = new ExEventHandle(handleName);
+            this.ExEvent = ExternalEvent.Create(this.Handle);
+        }
+
+        /// <summary>
+        /// 外部事件实例
+        /// </summary>
+        private readonly ExternalEvent ExEvent;
+
+        /// <summary>
+        /// 外部事件处理程序
+        /// </summary>
+        private readonly ExEventHandle Handle;
+
+        /// <summary>
+        /// 在外部事件中执行函数, 可以等待函数执行完成
+        /// </summary>
+        /// <param name="action">要执行的函数</param>
+        /// <param name="transactionGroupName">事务组名</param>
+        /// <returns></returns>
+        public async Task InvokeAsync(Action<UIApplication> action)
+        {
+            var workItem = new ExEventWorkItem(action);
+            Handle.ExEventQueue.Enqueue(workItem);
+            ExEvent.Raise();
+            await workItem.CompletionSource.Task;
+        }
+
+        /// <summary>
+        /// 在外部事件中执行函数, 并且可以等待函数执行完成
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="func">要执行的函数</param>
+        /// <returns></returns>
+        public async Task<T> InvokeAsync<T>(Func<UIApplication, T> func)
+        {
+            object func1(UIApplication app)
+            {
+                return func(app);
+            }
+            var workItem = new ExEventWorkItem(func1);
+            Handle.ExEventQueue.Enqueue(workItem);
+            ExEvent.Raise();
+            var result = await workItem.CompletionSource.Task;
+            return (T)result;
+        }
+
+        /// <summary>
+        /// 获取或创建外部事件处理实例
+        /// </summary>
+        /// <param name="name">外部事件处理程序名称</param>
+        /// <returns></returns>
+        public static ExEventUtils GetOrCreate(string name = "ScriptPadExEventHandle")
+        {
+            return EventUtils.GetOrAdd(name, new ExEventUtils(name));
+        }
+
+        private static readonly ConcurrentDictionary<string, ExEventUtils> EventUtils = new ConcurrentDictionary<string, ExEventUtils>();
+    }
+}