diff --git a/lib/zin/wg/gantt/js/v1.js b/lib/zin/wg/gantt/js/v1.js
index 2bdd2d8bfd..1ae73b5c38 100644
--- a/lib/zin/wg/gantt/js/v1.js
+++ b/lib/zin/wg/gantt/js/v1.js
@@ -646,11 +646,11 @@ function initGantt()
     resizeGanttView();
     $(window).off('.gannt').on('resize.gannt', function(){resizeGanttView()});
 
-    if(typeof isSearch != 'undefined' && isSearch)
-    {
-        gantt._clear_data();
-        ganttData.links = [];
-    }
+    /* 渲染甘特图时先清空原有数据。 */
+    gantt._clear_data();
+    /* 搜索时隐藏任务关系。 */
+    if(typeof isSearch != 'undefined' && isSearch) ganttData.links = [];
+
     gantt.init(ganttID);
     gantt.parse(ganttData);
     gantt.showDate(new Date());
diff --git a/module/programplan/ui/gantt.html.php b/module/programplan/ui/gantt.html.php
index 8e3fcccf36..4f2312d020 100644
--- a/module/programplan/ui/gantt.html.php
+++ b/module/programplan/ui/gantt.html.php
@@ -18,28 +18,24 @@ include './ganttfields.html.php';
 
 if($app->rawModule == 'programplan')
 {
+    $productDropdown = null;
     if($project->stageBy == 'product')
     {
         $viewName = $productID != 0 ? zget($productList, $productID) : $lang->product->allProduct;
         $items    = array();
         foreach($productList as $key => $productName) $items[] = array('text' => $productName, 'url' => $this->createLink('programplan', 'browse', "projectID=$projectID&productID=$key&type=gantt"));
-        featureBar
+        $productDropdown = dropdown
         (
-            dropdown
-            (
-                btn(set::type('link'), setClass('no-underline'), $viewName),
-                set::items($items)
-            )
-        );
-    }
-    else
-    {
-        featureBar
-        (
-            btn(setClass('ghost mr-2', ($browseType != 'bysearch' ? 'active' : '')), $lang->programplan->gantt, set::url($this->createLink('programplan', 'browse', "projectID=$projectID&productID=$productID&type=gantt"))),
-            $hasSearch ? li(searchToggle(set::module('projectTask'), set::open($browseType == 'bysearch'))) : null
+            btn(set::type('link'), setClass('no-underline'), $viewName),
+            set::items($items)
         );
     }
+    featureBar
+    (
+        btn(setClass('ghost mr-2', ($browseType != 'bysearch' ? 'active' : '')), $lang->programplan->gantt, set::url($this->createLink('programplan', 'browse', "projectID=$projectID&productID=$productID&type=gantt"))),
+        $productDropdown,
+        $hasSearch ? li(searchToggle(set::module('projectTask'), set::open($browseType == 'bysearch'))) : null
+    );
     toolbar
     (
         btnGroup