添加项目文件。

Szmedi.RevitToolkit.Approval/Assists/GenericFilter.cs

@@ -0,0 +1,22 @@
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI.Selection;
+
+namespace Szmedi.RevitToolkit.Approval.Assists
+{
+    /// <summary>
+    ///     类型过滤
+    /// </summary>
+    /// <typeparam name="T"></typeparam>
+    public class GenericFilter<T> : ISelectionFilter
+    {
+        public bool AllowElement(Element elem)
+        {
+            return elem is T;
+        }
+
+        public bool AllowReference(Reference reference, XYZ position)
+        {
+            return true;
+        }
+    }
+}