diff --git a/changelog.md b/changelog.md
index ebfefcf1e..566e578cb 100644
--- a/changelog.md
+++ b/changelog.md
@@ -3,6 +3,7 @@
 - 修改了下拉树展开图标模糊的问题
 - 修复了下拉树搜索高亮字符与正常字符间存在间距的问题
 - 复选下拉系列的计数器从trigger中拆分, 作为独立的部分
+- 增加BI.createElement方法
 
 2.0(2019-09)
 - [视觉]popover弹出框增加圆角
diff --git a/dist/2.0/fineui.css b/dist/2.0/fineui.css
index 35255b91a..8f43bebe4 100644
--- a/dist/2.0/fineui.css
+++ b/dist/2.0/fineui.css
@@ -2273,7 +2273,10 @@ textarea {
 .ztree.hack li ul.line {
   background: url('images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
+}
+.bi-theme-dark .ztree.hack li ul.line {
   background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
 }
 .bi-theme-dark .ztree.hack li ul.line {
@@ -4959,7 +4962,10 @@ textarea::-webkit-scrollbar-corner {
 .ztree.hack li ul.line {
   background: url('http://fine-design-storage.oss-cn-shanghai.aliyuncs.com/fineui/2.0/images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
+}
+.bi-theme-dark .ztree.hack li ul.line {
   background: url('http://fine-design-storage.oss-cn-shanghai.aliyuncs.com/fineui/2.0/images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
 }
 .bi-theme-dark .ztree.hack li ul.line {
diff --git a/dist/2.0/fineui.ie.js b/dist/2.0/fineui.ie.js
index de3d4b944..31620c92b 100644
--- a/dist/2.0/fineui.ie.js
+++ b/dist/2.0/fineui.ie.js
@@ -12248,6 +12248,11 @@ if (!_global.BI) {
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();!(function () {
     /*
     CryptoJS v3.1.2
@@ -87357,7 +87362,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
@@ -88742,7 +88747,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/dist/2.0/fineui.js b/dist/2.0/fineui.js
index 0499976ee..4338b61f5 100644
--- a/dist/2.0/fineui.js
+++ b/dist/2.0/fineui.js
@@ -12248,6 +12248,11 @@ if (!_global.BI) {
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();!(function () {
     /*
     CryptoJS v3.1.2
@@ -87761,7 +87766,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
@@ -89146,7 +89151,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/dist/base.css b/dist/base.css
index 657161da6..5e172fcbe 100644
--- a/dist/base.css
+++ b/dist/base.css
@@ -63,7 +63,10 @@
 .ztree.hack li ul.line {
   background: url('images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
+}
+.bi-theme-dark .ztree.hack li ul.line {
   background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
 }
 .bi-theme-dark .ztree.hack li ul.line {
diff --git a/dist/bundle.css b/dist/bundle.css
index 35255b91a..8f43bebe4 100644
--- a/dist/bundle.css
+++ b/dist/bundle.css
@@ -2273,7 +2273,10 @@ textarea {
 .ztree.hack li ul.line {
   background: url('images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
+}
+.bi-theme-dark .ztree.hack li ul.line {
   background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
 }
 .bi-theme-dark .ztree.hack li ul.line {
@@ -4959,7 +4962,10 @@ textarea::-webkit-scrollbar-corner {
 .ztree.hack li ul.line {
   background: url('http://fine-design-storage.oss-cn-shanghai.aliyuncs.com/fineui/2.0/images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
+}
+.bi-theme-dark .ztree.hack li ul.line {
   background: url('http://fine-design-storage.oss-cn-shanghai.aliyuncs.com/fineui/2.0/images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
 }
 .bi-theme-dark .ztree.hack li ul.line {
diff --git a/dist/bundle.ie.js b/dist/bundle.ie.js
index de3d4b944..31620c92b 100644
--- a/dist/bundle.ie.js
+++ b/dist/bundle.ie.js
@@ -12248,6 +12248,11 @@ if (!_global.BI) {
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();!(function () {
     /*
     CryptoJS v3.1.2
@@ -87357,7 +87362,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
@@ -88742,7 +88747,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/dist/bundle.js b/dist/bundle.js
index 0499976ee..4338b61f5 100644
--- a/dist/bundle.js
+++ b/dist/bundle.js
@@ -12248,6 +12248,11 @@ if (!_global.BI) {
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();!(function () {
     /*
     CryptoJS v3.1.2
@@ -87761,7 +87766,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
@@ -89146,7 +89151,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/dist/core.js b/dist/core.js
index eaabfb40f..af0fec677 100644
--- a/dist/core.js
+++ b/dist/core.js
@@ -12248,6 +12248,11 @@ if (!_global.BI) {
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();!(function () {
     /*
     CryptoJS v3.1.2
diff --git a/dist/fineui.css b/dist/fineui.css
index c27020a26..0552a99f9 100644
--- a/dist/fineui.css
+++ b/dist/fineui.css
@@ -2273,7 +2273,10 @@ textarea {
 .ztree.hack li ul.line {
   background: url('images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
+}
+.bi-theme-dark .ztree.hack li ul.line {
   background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
 }
 .bi-theme-dark .ztree.hack li ul.line {
@@ -4959,7 +4962,10 @@ textarea::-webkit-scrollbar-corner {
 .ztree.hack li ul.line {
   background: url('resources?path=/com/fr/web/ui/images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
+}
+.bi-theme-dark .ztree.hack li ul.line {
   background: url('resources?path=/com/fr/web/ui/images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
 }
 .bi-theme-dark .ztree.hack li ul.line {
diff --git a/dist/fineui.ie.js b/dist/fineui.ie.js
index 4c7aa208c..59ee3e741 100644
--- a/dist/fineui.ie.js
+++ b/dist/fineui.ie.js
@@ -12493,6 +12493,11 @@ if (!_global.BI) {
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();!(function () {
     /*
     CryptoJS v3.1.2
@@ -87602,7 +87607,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
@@ -88987,7 +88992,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/dist/fineui.js b/dist/fineui.js
index e6ff6075f..af19b0e7d 100644
--- a/dist/fineui.js
+++ b/dist/fineui.js
@@ -12493,6 +12493,11 @@ if (!_global.BI) {
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();!(function () {
     /*
     CryptoJS v3.1.2
@@ -88006,7 +88011,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
@@ -89391,7 +89396,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/dist/fineui_without_jquery_polyfill.js b/dist/fineui_without_jquery_polyfill.js
index cb4748713..171e69a14 100644
--- a/dist/fineui_without_jquery_polyfill.js
+++ b/dist/fineui_without_jquery_polyfill.js
@@ -12248,6 +12248,11 @@ if (!_global.BI) {
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();!(function () {
     /*
     CryptoJS v3.1.2
@@ -70298,7 +70303,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
@@ -71683,7 +71688,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/dist/resource.css b/dist/resource.css
index 681c9c90b..1de549273 100644
--- a/dist/resource.css
+++ b/dist/resource.css
@@ -133,7 +133,10 @@ textarea::-webkit-scrollbar-corner {
 .ztree.hack li ul.line {
   background: url('images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
+}
+.bi-theme-dark .ztree.hack li ul.line {
   background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
 }
 .bi-theme-dark .ztree.hack li ul.line {
diff --git a/dist/widget.js b/dist/widget.js
index 75a2abcb1..aa335fab6 100644
--- a/dist/widget.js
+++ b/dist/widget.js
@@ -25511,7 +25511,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
@@ -26896,7 +26896,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/public/css/background.css b/public/css/background.css
index e777caf73..26861a1fb 100644
--- a/public/css/background.css
+++ b/public/css/background.css
@@ -42,8 +42,8 @@
 .ztree.hack li ul.line {
   background: url('http://fine-design-storage.oss-cn-shanghai.aliyuncs.com/fineui/2.0/images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
-  background: url('http://fine-design-storage.oss-cn-shanghai.aliyuncs.com/fineui/2.0/images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
 }
 .bi-theme-dark .ztree.hack li ul.line {
   background: url('http://fine-design-storage.oss-cn-shanghai.aliyuncs.com/fineui/2.0/images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
diff --git a/src/component/treevaluechooser/abstract.treevaluechooser.js b/src/component/treevaluechooser/abstract.treevaluechooser.js
index 98c232b96..4f2c389f5 100644
--- a/src/component/treevaluechooser/abstract.treevaluechooser.js
+++ b/src/component/treevaluechooser/abstract.treevaluechooser.js
@@ -16,7 +16,7 @@ BI.AbstractTreeValueChooser = BI.inherit(BI.Widget, {
         var text = v;
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/src/component/valuechooser/abstract.valuechooser.js b/src/component/valuechooser/abstract.valuechooser.js
index ff199e76a..ac4b08ae5 100644
--- a/src/component/valuechooser/abstract.valuechooser.js
+++ b/src/component/valuechooser/abstract.valuechooser.js
@@ -25,7 +25,7 @@ BI.AbstractValueChooser = BI.inherit(BI.Widget, {
         if (BI.isNotNull(this.items)) {
             BI.some(this.items, function (i, item) {
                 // 把value都换成字符串
-                if (item.value + "" === v) {
+                if (item.value === v || item.value + "" === v) {
                     text = item.text;
                     return true;
                 }
diff --git a/src/core/shortcut.js b/src/core/shortcut.js
index 4e7df4ea7..66e303216 100644
--- a/src/core/shortcut.js
+++ b/src/core/shortcut.js
@@ -69,4 +69,9 @@
         throw new Error("无法根据item创建组件");
     };
 
+    BI.createElement = function () {
+        var widget = BI.createWidget.apply(this, arguments);
+        return widget.element;
+    };
+
 })();
\ No newline at end of file
diff --git a/src/css/base/colorchooser/colorpicker/editor.css b/src/css/base/colorchooser/colorpicker/editor.css
index 0efa18d06..5d3a17106 100644
--- a/src/css/base/colorchooser/colorpicker/editor.css
+++ b/src/css/base/colorchooser/colorpicker/editor.css
@@ -42,8 +42,8 @@
 .ztree.hack li ul.line {
   background: url('images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
-  background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
 }
 .bi-theme-dark .ztree.hack li ul.line {
   background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
diff --git a/src/css/resource/background.css b/src/css/resource/background.css
index 3bb602150..0bb6cd64a 100644
--- a/src/css/resource/background.css
+++ b/src/css/resource/background.css
@@ -42,8 +42,8 @@
 .ztree.hack li ul.line {
   background: url('images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
-  background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
 }
 .bi-theme-dark .ztree.hack li ul.line {
   background: url('images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
diff --git a/src/less/resource/background.less b/src/less/resource/background.less
index 56c7a5963..2a122eee5 100644
--- a/src/less/resource/background.less
+++ b/src/less/resource/background.less
@@ -61,7 +61,9 @@
 
 .bi-theme-dark {
   .ztree li ul.line {
-    .imagePath(@icon-tree-vertical-line-1-theme-dark, 0, 1px, repeat-y);
+    &:before {
+      border-left: 1px dashed #606479;
+    }
   }
   .ztree.hack li ul.line {
     .imagePath(@icon-tree-vertical-line-1-theme-dark, 0, 1px, repeat-y);
diff --git a/ui/css/background.css b/ui/css/background.css
index 430b0e1b0..0747b9182 100644
--- a/ui/css/background.css
+++ b/ui/css/background.css
@@ -42,8 +42,8 @@
 .ztree.hack li ul.line {
   background: url('resources?path=/com/fr/web/ui/images/1x/icon/tree_vertical_line_1.png') repeat-y 1px 0;
 }
-.bi-theme-dark .ztree li ul.line {
-  background: url('resources?path=/com/fr/web/ui/images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;
+.bi-theme-dark .ztree li ul.line:before {
+  border-left: 1px dashed #606479;
 }
 .bi-theme-dark .ztree.hack li ul.line {
   background: url('resources?path=/com/fr/web/ui/images/1x/icon/dark/tree_vertical_line_1.png') repeat-y 1px 0;