update

src/main/webapp/app/netTopology/model/icon/icon.component.html

@@ -21,12 +21,13 @@
         <nz-form-explain *ngIf="validateForm.get('firstTypeId').dirty && validateForm.get('firstTypeId').errors">请选择一级类型</nz-form-explain>
       </nz-form-control>
     </nz-form-item>
-    <nz-form-item *ngIf="validateForm.value.firstTypeId">
+    <nz-form-item>
       <nz-form-label [nzSpan]="7" nzFor="secondTypeId">选择二级类型</nz-form-label>
       <nz-form-control [nzSpan]="12">
         <nz-select  name="secondTypeId" nzAllowClear formControlName="secondTypeId" nzPlaceHolder="请选择二级类型">
           <nz-option *ngFor="let item of childrenList" [nzValue]="item.id" [nzLabel]="item.name"></nz-option>
         </nz-select>
+        <nz-form-explain *ngIf="validateForm.get('secondTypeId').dirty && validateForm.get('secondTypeId').errors">请选择二级类型</nz-form-explain>
       </nz-form-control>
     </nz-form-item>
   </form>

src/main/webapp/app/netTopology/model/icon/icon.component.ts

@@ -103,6 +103,15 @@ export class IconComponent implements OnInit {
 
     onChanges(e){
         this.childrenList = [];
+        console.log(e);
+        if(!isNaN(e)){
+            console.log('网站监测');
+            this.validateForm.get('secondTypeId').clearValidators();
+            this.validateForm.value.iconType = '1';
+        }else{
+            this.validateForm.get('secondTypeId').setValidators(Validators.required);
+           console.log('主机资源');
+        }
         this.options.forEach(res=>{
             if(res.id == e){
                 this.childrenList = res.childs;