添加项目文件。

DotNet.Exchange.Revit/Export/IExportElement.cs

@@ -0,0 +1,47 @@
+using Autodesk.Revit.DB;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DotNet.Exchange.Revit.Export
+{
+    /// <summary>
+    /// IExportElement
+    /// </summary>
+    public interface IExportElement
+    {
+        /// <summary>
+        /// 元素开始进行导出时执行.
+        /// 如果返回结果为true，则开始进行此元素导出，否则放弃此元素导出.
+        /// </summary>
+        bool OnElementStart(Element elem);
+
+        /// <summary>
+        /// 当元素内的GeometryObject进行导出时执行.
+        /// 如果返回结果为true，则开始进行此GeometryObject导出，否则放弃此元素导出.
+        /// </summary>
+        bool OnGeometryObjectStart(GeometryObjectNode geometryObject);
+
+        /// <summary>
+        /// 开始检索多边形的材质.
+        /// </summary>
+        void OnMaterial(ElementId materialId);
+
+        /// <summary>
+        /// 开始检索Solid内的多边形拓扑节点.
+        /// </summary>
+        void OnPolygonMesh(PolygonMeshNode polygonMesh);
+
+        /// <summary>
+        /// 当元素内的GeometryObject导出结束时执行.
+        /// </summary>
+        void OnGeometryObjectEnd(GeometryObjectNode geometryObject);
+
+        /// <summary>
+        /// 当元素导出结束时开始执行.
+        /// </summary>
+        void OnElementEnd(Element elem);
+    }
+}