如何在 html 滑动切换中显示在活动 = 1 时选中而在活动 = 0 时不选中? [英] how to show in html slide-toggle checked when acitve = 1 and not checked when active=0?

问题描述

我的 mat-slide-toggle 有问题.在网络中，我所有的滑动切换都像在 .image

我认为所有的东西都很好，但在 html 显示中所有检查.请问，你能给我建议任何解决方案吗?我尝试使用，就像在这个

在控制台中看起来不错，但在 html 中不显示，active = 1 已选中，active = 0 未选中.请知道如何实施?

更新代码:

<td><form [formGroup]="activeHomeboxPForm" class="col s12"><section class="example-section"><mat-slide-toggle formControlName="active-{{i}}" class="example-margin" [checked]="item.active === '1'">{{item.active}}</mat-slide-toggle></节></表单></td>

显示这个:

解决方案

您的 html 将所有滑块显示为选中状态，因为您为它们提供了相同的 formControlName

改成

 
<tr *ngFor="let item of homeboxsp; let i=index"><td><section class="example-section"><mat-slide-toggle formControlName="active-{{i}}" class="example-margin" [checked]="item.active === '1'">{{item.active}}</mat-slide-toggle></节></表单></td>

编辑

您还可以为所有滑块使用一个独特的表单组

let 控件 = {'homeboxpackage_id': new FormControl('', Validators.required)};for(let i = 0;i < this.homeboxsp.length;i++){控件['active-'+i] = new FormControl(this.homeboxsp[i].active =='1', Validators.required)}this.myform = new FormGroup(controls);

https://stackblitz.com/edit/angular-afrebm?file=app%2Fapp.component.ts

I have a problem with my mat-slide-toggle. In web all my slide-toggle are checked like in .image

I think that all of things are good, but in html display all checked. Please, can you suggest me any solution? I try to use, like in this post but nothing work for me. My code:

ts code:

this.activeHomeboxPForm = new FormGroup({
  'active': new FormControl(true, Validators.required),
  'homeboxpackage_id': new FormControl('', Validators.required)

});
  populateFormHomeboxP() {
    this.ws.homeboxPGetAll().subscribe(
      homeboxsp => {
        this.homeboxsp = homeboxsp.map((homeboxspp) => {
        this.activeHomeboxPForm.controls['active'].setValue(homeboxspp.active),
        this.activeHomeboxPForm.controls['homeboxpackage_id'].setValue(homeboxspp.homeboxpackage_id)
          console.log(homeboxspp)
          console.log(homeboxspp.active)
          console.log(homeboxspp.homeboxpackage_id)
          return new HomeboxP(homeboxspp);

        });
      }
    )
  }

html code:

  <tbody>
      <tr *ngFor="let item of homeboxsp; let i=index">
       <td> 
        <form [formGroup]="activeHomeboxPForm" class="col s12"> 
          <section class="example-section">
            <mat-slide-toggle  formControlName="active" class="example-margin" [checked]="item.active === '1'"> {{item.active}}
            </mat-slide-toggle>
          </section>
          </form>
      </td>
     </tr>
    </tbody>

in console looks good, but in html doesn't display, active = 1 checked and active = 0 no checked. Please any idea how to implement?

Update code:

<tr *ngFor="let item of homeboxsp; let i=index">
   <td> 
    <form [formGroup]="activeHomeboxPForm" class="col s12"> 
      <section class="example-section">
        <mat-slide-toggle  formControlName="active-{{i}}" class="example-margin" [checked]="item.active === '1'"> {{item.active}}
        </mat-slide-toggle>
      </section>
      </form>
  </td>

show this:

解决方案

Your html displays all sliders as checked because you gave them all the same formControlName

Change it to

    <form [formGroup]="activeHomeboxPForm" class="col s12"> 
<tr *ngFor="let item of homeboxsp; let i=index">
   <td> 

      <section class="example-section">
        <mat-slide-toggle  formControlName="active-{{i}}" class="example-margin" [checked]="item.active === '1'"> {{item.active}}
        </mat-slide-toggle>
      </section>
      </form>
  </td>

Edit

You can also use one unique form group for all your sliders

let controls = {
  'homeboxpackage_id': new FormControl('', Validators.required)
};

for(let i = 0;i <  this.homeboxsp.length;i++)
{
  controls['active-'+i] = new FormControl(this.homeboxsp[i].active =='1', Validators.required)
}
    this.myform = new FormGroup(controls);

https://stackblitz.com/edit/angular-afrebm?file=app%2Fapp.component.ts

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