如何使用隐藏在angular5中?

How to use Hidden in angular5?

我正在使用 angular5 作为前端,spring-boot 作为后端,在下面的代码中我有一个管理员可以接受或不接受的干预列表。

出于这个原因,我使用了隐藏属性,因此当管理员验证他只能获得 'accepted' 时,我尝试这样做,但我遇到了一些问题。

这是我使用的代码。

如果 c.valid 为真,'Accepted' 按钮出现,否则 'Not Accepted' 按钮应该出现。

文件intervention.component.html

 <!--/.col-->
<div class="col-lg-12">
  <div class="card">
    <div class="card-header">
      <i class="fa fa-align-justify"></i> Les interventions
    </div>
    <div class="card-body">
      <table class="table table-striped">
        <thead>
        <tr>
          <th>Numéro</th>
          <th>objet</th>
          <th>date</th>
          <th>Etat</th>
        </tr>
        </thead>
        <tbody>

        <tr *ngFor="let c of pageIntervention?.content">
          <td>{{c.id}}</td>
          <td>{{c.objet}}</td>
          <td>{{c.date}}</td>
          <td>
            <button type="button"  [hidden]="c.valid" (click)="validate(c.id)">Not accepted</button>
            <button type="button" [hidden]="!c.valid">Accepted</button>

          </td>
        </tr>

        </tbody>
      </table>

      <ul class="pagination">
        <li class="page-item" [ngClass]="{'active':i==currentPage}" *ngFor="let p of pages ; let i=index">
          <a class="page-link" (click)="gotoPage(i)">{{i}}</a>
        </li>
      </ul>
    </div>
  </div>
</div>

文件Intervention.component.ts

  export class InterventionComponent implements OnInit {

  pageIntervention:any;
  pages:Array<number>;
  currentPage:number=0;
  page:number=0;
  size:number=5;
  id:number;

  constructor(private intervService: InterventionService,
              private authService: AuthenticationService ) { }


  ngOnInit() {
    this.id  = this.authService.getAuthenticatedUserId();
    this.Allinterventions();
  }

  Allinterventions(){
    this.intervService.getAllinterventions(this.page,this.size,this.id)
      .subscribe((data:any)=>{
        this.pageIntervention = data;
      },err=>{
        console.log('there is an error  ');
      })
  }

  validate(id:number){
      // here i want to modify c.valid so it changes from false to true .

     this.intervService.ValidateIntervention(id); // i call the service 
     method to send the update Request to the API rest (spring). 
  }


  gotoPage(i:number){
    this.currentPage = i;
    this.Allinterventions();
  }
}

这可能是我正在尝试做的事情吗?如果是的话,你知道怎么做吗?

编辑 解释:

管理员可以获得他可以接受或不接受的干预列表(valid 是 spring 中干预实体中的布尔属性),我想要的是如果 valid 为 false 那么管理员将看到只有 'Not accepted' ,然后他可以单击此按钮以便接受它,因此在验证方法中我应该将 c.valid 的值从 false 更改为 true ,这样只有接受的按钮才会出现管理员,

好吧,用ngIf试试,因为逻辑有点乱,在函数中validate直接发送对象引用修改

ngIF

 <button type="button"  *ngIf="c.valid" (click)="validate(c)">Not accepted</button>
<button type="button"   *ngIf="!c.valid">Accepted</button>

[隐藏]

 <button type="button"  [hidden]="!c.valid" (click)="validate(c)">Not accepted</button>
<button type="button" [hidden]="c.valid">Accepted</button>

组件

validate(ref: any){
      // here i want to modify c.valid so it changes from false to true .
      // i want to change it in pageIntervention first and then call the api
         rest to change it in database  . 

     //this.intervService.ValidateIntervention(id); // i call the service 
     //method to send the update Request to the API rest (spring).

     ref.valid = !ref.valid;

  }
Simply use *ngIf as below
<button type="button"  *ngIf="c.valid; else accepted" (click)="validate(c.id)">Not accepted</button>
<ng-template #accepted>
<button type="button" >Accepted</button>
<ng-template>