fix:修复点击“修改”按钮后偶发前端报错的问题

YLErpWeb/Views/SwapTrade/tradeEdit.cshtml

@@ -1,10 +1,11 @@
-@using YLErp.Web.Models.JsModels;
+@using YLErp.Web.Models.JsModels;
 @model trade
 @{
     ViewBag.Title = "交易信息 | 编辑";
     Layout = "~/Views/Shared/_InfoLayout.cshtml";
 
     var isAdd = Model.id == 0;
+    var isUseApproval = ViewBag.isUseApproval ?? false;
     var canChangeClient = isAdd || Model.TradeStatus == ConsTrade.新增待确认;
     var canAddNewTrader = CurUser.交易管理_新增选择交易员;
 
@@ -594,7 +595,7 @@
                 <span class="js-li-none-tip" style="display:none;">没有可选择的标签，可按Enter键新增</span>
             </div>
             <div class="text-center">
-                @if (ViewBag.isUseApproval)
+                @if (isUseApproval)
                 {
                     <button class="btn btn-primary" type="button" v-on:click="submit('pass')">审批通过</button>
                     <button class="btn btn-primary" type="button" v-on:click="submit('reject')">拒绝</button>

YLErpWeb/Views/SwapTrade2/TradeEdit.cshtml

@@ -6,6 +6,7 @@
     Layout = "~/Views/Shared/_InfoLayout.cshtml";
 
     var isAdd = Model.id == 0;
+    var isUseApproval = ViewBag.isUseApproval ?? false;
     var canChangeClient = isAdd || Model.TradeStatus == ConsTrade.新增待确认;
     var canAddNewTrader = CurUser.交易管理_新增选择交易员;
     var canEdit = Model.SwapCanEdit() && CurUser.交易管理_交易编辑;
@@ -509,7 +510,7 @@
                              <textarea v-model="trade.Comments" class='text-box text-left' rows='3' id='Comments'></textarea>
                         </div>
                         <div style="float:left;margin-top:10px;margin-left:36px;">
-                            @if (ViewBag.isUseApproval)
+                            @if (isUseApproval)
                             {
                                 <button class="btn btn-primary swapclose" type="button" v-on:click="submit('reject')">拒绝</button>
                                 <button class="btn btn-primary" type="button" v-on:click="submit('pass')">审批通过</button>