From b34d17f2d1fcd6399bd4bde0fbd34372812e8158 Mon Sep 17 00:00:00 2001
From: tian <11429339@qq.com>
Date: Mon, 18 May 2026 19:26:52 +0800
Subject: [PATCH] =?UTF-8?q?=E6=81=A2=E5=A4=8D=20Task.Run=20=E5=8C=85?=
 =?UTF-8?q?=E8=A3=85=20ExportSectionBoxFromActiveView=EF=BC=8C=E4=BF=AE?=
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- 树遍历（GetObjectsAndHiddenItems）在后台线程执行，恢复 4月15日版本的性能
- 导出阶段 NwdExportHelper 内部 Dispatcher.Invoke 回 UI 线程
---
 src/UI/WPF/ViewModels/LayerManagementViewModel.cs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/UI/WPF/ViewModels/LayerManagementViewModel.cs b/src/UI/WPF/ViewModels/LayerManagementViewModel.cs
index 2f977da..15aad49 100644
--- a/src/UI/WPF/ViewModels/LayerManagementViewModel.cs
+++ b/src/UI/WPF/ViewModels/LayerManagementViewModel.cs
@@ -1948,8 +1948,11 @@ namespace NavisworksTransport.UI.WPF.ViewModels
 
                 // 委托给业务层：验证剖面盒 → 遍历模型树 → 导出
                 CurrentOperationText = "正在查找剖面盒内的对象...";
-                var exporter = new SectionBoxExporter();
-                var result = exporter.ExportSectionBoxFromActiveView(document, saveFilePath);
+                var result = await Task.Run(() =>
+                {
+                    var exporter = new SectionBoxExporter();
+                    return exporter.ExportSectionBoxFromActiveView(document, saveFilePath);
+                });
 
                 if (result.Success)
                 {