diff --git a/SGGL/FineUIPro.Web/FineUIPro.Web.csproj b/SGGL/FineUIPro.Web/FineUIPro.Web.csproj
index ba58f7e9..a4dfcd34 100644
--- a/SGGL/FineUIPro.Web/FineUIPro.Web.csproj
+++ b/SGGL/FineUIPro.Web/FineUIPro.Web.csproj
@@ -16838,7 +16838,7 @@
     </COMReference>
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
-  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v18.0\WebApplications\Microsoft.WebApplication.targets" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v15.0\WebApplications\Microsoft.WebApplication.targets" />
   <ProjectExtensions>
     <VisualStudio>
       <FlavorProperties GUID="{349c5851-65df-11da-9384-00065b846f21}">
diff --git a/SGGL/FineUIPro.Web/ProjectData/UnitWorkEdit.aspx b/SGGL/FineUIPro.Web/ProjectData/UnitWorkEdit.aspx
index 5546c224..c8aee32d 100644
--- a/SGGL/FineUIPro.Web/ProjectData/UnitWorkEdit.aspx
+++ b/SGGL/FineUIPro.Web/ProjectData/UnitWorkEdit.aspx
@@ -72,7 +72,7 @@
                     <Items>
                         <f:Label runat="server" ID="txtMainItemAndDesignProfessional" Label="对应主项及设计专业" LabelWidth="150px"></f:Label>
                         <f:Button runat="server" ID="btnSelect" OnClick="btnSelect_Click" Text="选择"></f:Button>
-                        <f:HiddenField runat="server" ID="hdMainItemAndDesignProfessionalIds"></f:HiddenField>
+                        <f:TextBox runat="server" ID="hdMainItemAndDesignProfessionalIds" Hidden="true"></f:TextBox>
                    </Items>
                 </f:FormRow>
             </Rows>
diff --git a/SGGL/FineUIPro.Web/ProjectData/UnitWorkEdit.aspx.designer.cs b/SGGL/FineUIPro.Web/ProjectData/UnitWorkEdit.aspx.designer.cs
index 234620cc..fac75aff 100644
--- a/SGGL/FineUIPro.Web/ProjectData/UnitWorkEdit.aspx.designer.cs
+++ b/SGGL/FineUIPro.Web/ProjectData/UnitWorkEdit.aspx.designer.cs
@@ -145,7 +145,7 @@ namespace FineUIPro.Web.ProjectData {
         /// 自动生成的字段。
         /// 若要进行修改，请将字段声明从设计器文件移到代码隐藏文件。
         /// </remarks>
-        protected global::FineUIPro.HiddenField hdMainItemAndDesignProfessionalIds;
+        protected global::FineUIPro.TextBox hdMainItemAndDesignProfessionalIds;
         
         /// <summary>
         /// Toolbar1 控件。