diff --git a/projects/WebMVC/wwwroot/js/iot.js b/projects/WebMVC/wwwroot/js/iot.js
index 18bf8f63..e15d809c 100644
--- a/projects/WebMVC/wwwroot/js/iot.js
+++ b/projects/WebMVC/wwwroot/js/iot.js
@@ -99,7 +99,7 @@ deviceInfo['串口控制器'] = 'iot-serial-port';
 function updateSelect(action, id, value) {
     var select = $('select#' + id);
     if (select.length) {
-        select.find("option[value!=null]").remove();
+        select.find("option[value!='']").remove();
         if (value) {
             var url = config.baseUrl + '/IoTCenter/Admin/Ajax/' + action + '?parentId='+ value;
             $.getJSON(url, function (data) {
diff --git a/projects/WebMVC/wwwroot/router/admin/command/edit.html b/projects/WebMVC/wwwroot/router/admin/command/edit.html
index ca668023..aa348f0c 100644
--- a/projects/WebMVC/wwwroot/router/admin/command/edit.html
+++ b/projects/WebMVC/wwwroot/router/admin/command/edit.html
@@ -100,7 +100,7 @@
                                             <label class="col-sm-2 col-form-label">{{param.description}}:</label>
                                             <div class="col-sm-6 form-control" style="border-color:transparent;height:auto;min-height:calc(2.25rem + 2px);">
                                                 <select id="irType" class="form-control" v-model="param.value" @input="change2(index)">
-                                                    <option value="null">请选择</option>
+                                                    <option :value="null">请选择</option>
                                                     <option v-for="item in getIrTypeList()" :value="item.value">{{item.text}}</option>
                                                 </select>
                                                 <div style="height:1em;">
@@ -109,7 +109,7 @@
                                                 </div>
                                             </div>
                                         </div>
-                                        <div class="form-group row" v-if="param.description==='键值'&&getIrType()!=='请选择'">
+                                        <div class="form-group row" v-if="param.description==='键值'&&getIrType()">
                                             <label class="col-sm-2 col-form-label">{{param.description}}:</label>
                                             <div class="col-sm-6 form-control" style="border-color:transparent;height:auto;min-height:calc(2.25rem + 2px);">
                                                 <iot-ir-command :type="getIrType()" :value.sync="param.value" :buttons="getIrButtons()" />
@@ -126,7 +126,7 @@
                                         <label class="col-sm-2 col-form-label">{{param.description}}:</label>
                                         <div class="col-sm-6 form-control" style="border-color:transparent;height:auto;min-height:calc(2.25rem + 2px);">
                                             <select class="form-control" v-model="param.value" @input="change2(index)">
-                                                <option value="'null'">请选择</option>
+                                                <option :value="null">请选择</option>
                                                 <option v-for="item in getSPCommands()" :value="item.name">{{item.name}}</option>
                                             </select>
                                             <div style="height:1em;">
@@ -340,7 +340,7 @@
             },
             getIrType: function () {
                 var param = Enumerable.from(this.data.model.parameters).firstOrDefault(o => o.name === 'type');
-                if (param) {
+                if (param && param.value) {
                     return Enumerable.from(this.getIrTypeList()).firstOrDefault(o => o.value === param.value).text;
                 }
                 return null;
@@ -402,7 +402,7 @@
         watch: {
             'data.model.apiId': function (val, oldVal) {
                 var vm = this;
-                if ((oldVal === null || oldVal === 'null') && val && val !== 'null' && this.data.model.nodeId && this.data.model.deviceId) {
+                if (oldVal === null && val && val !== 'null' && this.data.model.nodeId && this.data.model.deviceId) {
                     Vue.set(vm.data.data, vm.data.model.apiId, $('#apiId option:selected').text());
                     vm.errors = [];
                     var url = this.path + 'Api?apiId=' + val + '&deviceId=' + this.data.model.deviceId;
@@ -413,7 +413,7 @@
                     });
                 }
                 else {
-                    if (val === 'null') {
+                    if (val === null) {
                         vm.data.model.parameters = [];
                     }
                 }
diff --git a/projects/WebMVC/wwwroot/router/shared/edit/selectlist.html b/projects/WebMVC/wwwroot/router/shared/edit/selectlist.html
index 79ce468f..184b6108 100644
--- a/projects/WebMVC/wwwroot/router/shared/edit/selectlist.html
+++ b/projects/WebMVC/wwwroot/router/shared/edit/selectlist.html
@@ -1,7 +1,7 @@
 <template>
     <div>
         <select class="form-control" :id="name" :name="currentName" v-model="currentValue">
-            <option value="null">请选择</option>
+            <option :value="null">请选择</option>
             <option v-for="item in list" :value="item.value">{{item.text}}</option>
         </select>
     </div>