Question

我想在不使用change()或click()函数的情况下获取组件中表单的所有已检查项目，因为它无法获取已检查的项目。

这是我在TS中的数组：

  PartyRoles = [
    {
     Id: 1,
     Name: "Vendor",
     Checked: true
    },
    {
      Id: 2,
      Name: "Client",
      Checked: true
    },
    {
      Id: 3,
      Name: "Consigner",
      Checked: false
    }       
  ]

我的HTML表单：

<form (ngSubmit)="editPartyRolesSubmit()">
    <div *ngFor="let item of PartyRoles">
        <label>
        <input type="checkbox" value="{{item.Id}}" [attr.checked]="item.Checked==true ? true : null" [attr.disabled]="item.Id==1 ? true : null" />
        <span innerHTML="{{item.Name}}"></span>
       </label>
    </div>
</form>

我的onSubmit函数，我想在其中获取所有选中的值：

  editPartyRolesSubmit= function () {
    // Please suggest how to fetch checked items
  }

Answer 1

您可以使用Form和NgModel

<form #checkboxForm="ngForm" (submit)="editPartyRolesSubmit()">
    <div *ngFor="let item of PartyRoles">
        <label>
        <input type="checkbox" value="{{item.Id}}" [(ngModel)]="item.Checked" [name]="item.Name" [attr.disabled]="item.Id==1 ? true : null" />
        <span innerHTML="{{item.Name}}"></span>
    </label>
    </div>
    <input type="submit" value="Submit">
</form>

功能可以

editPartyRolesSubmit() {
  console.log(this.PartyRoles);
}

Answer 2

将您的Html更改为以下内容：

<form (ngSubmit)="editPartyRolesSubmit()">
    <div *ngFor="let item of PartyRoles">
        <label>
        <input type="checkbox" value="{{item.Id}}" 
               [checked]="item.Checked" 
               (change)="item.Checked = !item.Checked" 
               [attr.disabled]="item.Id==1 ? true : null" />
        <span innerHTML="{{item.Name}}"></span>
       </label>
    </div>
</form>

您的PartyRoles将保持更新最新的复选框值。您可以像这样访问它：

  editPartyRolesSubmit(){

    // Access each item like this in PartyRoles
    this.PartyRoles.forEach(role=>{
      console.log('Id: ' + role.Id + ', Name: ' + role.Name + ', Checked: ' + role.Checked);
    });

    // Or like this 
    let role = this.PartyRoles.find(x=>x.Id === 1);
    if(role !== undefined){
      console.log(role);
    }

    // Or a filetered list 
    let checkedRoles = this.PartyRoles.filter(x=>x.Checked === true);
    console.log(checkedRoles);

    // Or by array index
    let roleTwo = this.PartyRoles[2];
    console.log(roleTwo);

  }

您不必在方法中使用function关键字。这是指向working demo的链接。

Answer 3

您可以使用：

<form (ngSubmit)="editPartyRolesSubmit()">
<div *ngFor="let item of PartyRoles; let i = index">
    <label>
    <input type="checkbox"
           [attr.checked]="item.Checked == true ? true : null"
           (change)="item.Checked = !item.Checked"
           [attr.disabled]="item.Id==1 ? true : null" />
    <span innerHTML="{{item.Name}}"></span>
   </label>
</div>
<button type="submit">Click</button>
</form>

或者：

<form (submit)="editPartyRolesSubmit()">
<div *ngFor="let item of PartyRoles">
    <label>
    <input type="checkbox" value="{{item.Id}}" [(ngModel)]="item.Checked" [name]="item.Name" [attr.disabled]="item.Id==1 ? true : null" />
    <span innerHTML="{{item.Name}}"></span>
</label>
</div>
<button type="submit">Click</button>
</form>

Answer 4

另一种方式，

在你的 html 中

 <li *ngFor="let course of courses.ugreg">
              <mat-checkbox [checked]="course.checked" [(ngModel)]="course.checked" name="course.name">
                {{course.name}}
              </mat-checkbox>
            </li>

在你的打字稿中

selectedcourses = [];

courses: Courses = {
name: 'Courses',
checked: false ,
ugreg: [
  { name: 'B Com(Computer)*',checked: false},
  { name: 'B Com(Marketing)*', checked: false},
  { name: 'BBA*', checked: false },
  { name: 'BCA**', checked: false }
],
};

并在您的表单中提交按钮方法

onSubmit() {
this.courses.ugreg.forEach(x => { if (x.checked) { this.selectedcourses.push(x.name); } 
 })

Answer 5

您可以为所选项目创建单独的数组

SelectedList=[]
for(let i=0;i<PartyRoles.length;i++){
 if(PartyRoles[i].checked){
  SelectedList.push(PartyRoles[i]);
 }
}

如何在角度2/4上的表单提交上传递所有选中的复选框值

5 个答案: