我有表格阵列,我很难解决这个问题.
这是我目前的代码
.TS
ngOnInit() {
this.item = this.fb.group({
codeId: ['',Validators.pattern(/^\d+$/)],name: ['',[Validators.required,Validators.minLength(3)]],stepTextarea: ['',[]],steps: [this.fb.array([]),[]]
});
}
addProcedure (e): void {
e.preventDefault();
const control = <FormGroup>this.item;
const steps = <FormArray>this.item.controls['steps'];
steps.push(control.get('stepTextarea').value);
control.get('stepTextarea').setValue("",{onlySelf: true})
}
onSubmit({value,valid}: {value: Item,valid: boolean}): void {
const control = <FormGroup>this.item;
console.log(value);
}
html的
<ol ngFor [ngForOf]="item.get('steps').controls">
<span [formGroupName]="i">{{i}}</span>
</ol>
我很难如何填充和推动.我找不到任何教程.
编辑
提交时我想要这样的东西
{
codeId: 123,name: "wew",stepTextarea: "",steps: ['asdjlkas','12312','12321']
}
由于您希望步骤在提交时显示如下：
steps: ['asdjlkas','12321']
你不应该在步骤中使用formGroup.
表单的构建应如下所示：
ngOnInit() {
this.item = this.fb.group({
codeId: ['',stepTextarea: [''],steps: this.fb.array([]) // do not enclose steps inside an array
});
}
编辑：
这将是你的addProcedure的样子：
addStep() {
const control = <FormArray>this.item.controls['steps'];
// push the value from stepTextArea to array
control.push(new FormControl(this.item.get('stepTextArea').value))
// reset
this.item.get('stepTextArea').reset()
}
你的模板看起来像这样：
<div formArrayName="steps">
<h3>Steps: </h3>
<ol *ngFor="let step of item.controls.steps.controls; let i = index">
<span>{{step.value}}</span>
</ol>
</div>
原始答案解决方法如何做FormArray：
addProcedure应如下所示：
addProcedure (e): void {
const steps = <FormArray>this.item.controls['steps'];
steps.push(new FormControl())
}
你的formarray模板应该是这样的：
<div formArrayName="steps">
<div *ngFor="let step of item.controls.steps.controls; let i = index" >
<label>Step {{i+1}} </label>
<input formControlName="{{i}}" />
</div>
</div>
