我有一些表单字段,想要动态添加更多来自另一个视图的字段(用户可以在其中输入表单字段类型、长度和名称),我需要使用这些值构造表单字段。
我如何设法构建一个字段(textbox name is 'one'
)但是如果我尝试添加另一个字段(textbox name is 'two'
)收到以下错误消息:
ERROR Error: Cannot find control with path: 'newfields -> 0 -> two'
问题组件.html
<form [formGroup]="issuerTestCaseFrm">
<div>
<label for="inputName3">Issuer Reference Number: </label>
<input name="lcid" formControlName="IssuerReferenceNumber" required type="tel" class="form-control">
</div>
<div formArrayName="newfields">
<div [formGroupName]="i" *ngFor="let tech of issuerTestCaseFrm.controls.newfields.controls; let i = index">
<div *ngFor="let prop of fieldProps">
<label class="col-sm-2 control-label">{{fields[prop].label}}</label>
<div [ngSwitch]="fields[prop].type">
<input *ngSwitchCase="'text'" [formControlName]="prop">
</div>
</div>
</div>
</div>
</form>
<button type="submit" (click)="addNewInputField()"> Add New Column </button>
问题组件.ts
import { Component, ViewEncapsulation, Pipe, PipeTransform, OnInit } from '@angular/core';
import { FormBuilder, FormGroup, Validators, FormControl, FormArray } from '@angular/forms';
import { ModalComponent } from '../../modal/modal.component';
import { NgbModal } from '@ng-bootstrap/ng-bootstrap';
@Component({
selector: 'viewhistory',
templateUrl: './issuecomponent.html',
})
export class IssuerTestcaseExecution implements OnInit {
issuerTestCaseFrm: FormGroup;
fields: any;
fieldProps: any;
formControls = {};
constructor(
private fb: FormBuilder,
public modalService: NgbModal,
) {
this.issuerTestCaseFrm = fb.group({
'IssuerReferenceNumber': ['', Validators.required],
'newfields': fb.array([]),
});
}
initNewFields(): FormGroup {
this.fieldProps.forEach(prop => {
this.formControls[prop] = [this.fields[prop].value, Validators.required];
});
return this.fb.group(this.formControls);
}
//Assuming these results coming from modal view after add button click
addNewInputField(): void {
const modalRef = this.modalService.open(ModalComponent);
modalRef.result.then((result) => {
this.fields = {
[result.fieldname]: {
type: result.fieldtype,
value: result.fieldvalue,
label: result.fieldname,
},
};
this.fieldProps = Object.keys(this.fields);
const control = <FormArray>this.issuerTestCaseFrm.controls.newfields;
control.push(this.initNewFields());
}, (reason) => {
});
}
}
我已在 stackblitz.com 中添加了示例代码。任何机构都可以帮助解决这个问题吗:https://stackblitz.com/edit/angular-871vxk?file=src/app/app.component.ts