Javascript 以角度更新表格
我正在尝试在创建事件后执行操作。 创建一个已在form1中选择的控件表单,并更新一个PSselected表。 我有两个文件,A.html和A.ts A.html:Javascript 以角度更新表格,javascript,angular,Javascript,Angular,我正在尝试在创建事件后执行操作。 创建一个已在form1中选择的控件表单,并更新一个PSselected表。 我有两个文件,A.html和A.ts A.html: <mat-select placeholder="form1" [formControl]="product" (ngModelChange)="getP($event)" multiple> <mat-option *ngFor="let p of allProduct" [value]="p.pro_nom"&g
<mat-select placeholder="form1" [formControl]="product" (ngModelChange)="getP($event)" multiple> <mat-option *ngFor="let p of allProduct" [value]="p.pro_nom">{{p.pro_nom}}</mat-option>
</mat-select>
<mat-form-field *ngFor="let valeurControls of valeursControls">
<input matInput maxLength="255" type="text [placeholder]="valeurControls.valeur.n [formControl]="valeurControls.formControl">
</mat-form-field>
答:
在函数getP中,我的表正在更新,但是当我在buildForm中使用它时,它是空的,但是它应该具有与调用this.buildForm相同的值;从组件构造函数。 pSelected的值将是声明的值:public pSelected:Array 在mat select组件内选择/取消选择值时,应重新生成控件 尝试:
首先使用更具描述性的变量名,而不是“b”和“p”。像这样阅读你的代码真的很难。我真的很抱歉,你可以在这里编辑你的代码,然后使用更具描述性的东西。我认为你也可以在subscribeThank you中使用observable as pSelected和buildForm,但它不太好用。当我单击它时,会添加表单控件,但如果我再次单击,它不会删除它。所以我只剩下duplicates@NickLersberghe我不知道如何在这种情况下使用observable。你可以从你的PSF中创建一个observable。在构造函数中,您可以订阅它。每当pSelected发生更改时,该订阅将运行该代码。这样,每次pSelected更改时,都将调用buildForm。尝试类似“pSelected:Observable”的方法,并在构造函数中使用“this.pSelected.subscriberr=>this.buildFormarr”。您可以将该方法更改为使用该参数,而不是使用this.pSelected。一定要测试它,我不完全确定它是否能按预期工作。
import { ChangeDetectorRef, Component, OnInit, ViewEncapsulation, Output, EventEmitter } from '@angular/core';
import { FormBuilder, FormControl, FormGroup, Validators } from '@angular/forms';
import { filter, takeUntil } from 'rxjs/operators';
import { Product, Candy } from 'src/app/models';
import { Service } from 'src/app/services';
import { Listener } from 'selenium-webdriver';
@Component({
selector: 'ei',
templateUrl: './A.component.html',
styleUrls: ['./A.component.less'],
encapsulation: ViewEncapsulation.None
})
export class AComponent extends FormFieldsContainer implements OnInit {
@Output('change') inputChange = new EventEmitter();
//var
allProduct: Product[];
Candy: Candy;
// Form
actionFormGroup: FormGroup;
product: FormControl;
event: Listener[]
// P
valeursControls: { valeur: candy, formControl: FormControl }[] = [];
public pSelected: Array<any>;
// Constructor
constructor(private fb: FormBuilder) {
super();
this.Candy = this.Candy ? this.Candy : { name: null, type: null };
this.pSelected = [];
this.buildForm();
}
ngOnInit() {
this.Service.getProduct()
.pipe(takeUntil(this.unsubscribe))
.subscribe(p => {
this.allProduct = p;
});
}
getP(event?: Event[]) {
if (typeof event == 'undefined') {
this.pSelected = [];
} else {
this.pSelected = event;
}
console.log(this.pSelected)
return this.pSelected;
}
getFormGroup(): FormGroup {
return this.actionFormGroup;
}
onSubmitSuccess<Boolean>(result: Boolean) {
}
private buildForm() {
this.submitted = false;
this.p= this.fb.control('', Validators.required);
this.actionFormGroup = this.fb.group({
product: this.product
});
// my array does not update, it remains empty
this.pSelected .forEach(p => {
const VarFormControl = this.fb.control(null);
this.valeursControls.push({
valeur: { name: p, type: this.Candy.type },
formControl: VarFormControl
});
this.actionFormGroup.addControl(p, VarFormControl );
});
}
Actions() {
this.submitted = true;
}
}
getP(event?: Event[]) {
this.valeursControls = [];
if (typeof event == 'undefined') {
this.pSelected = [];
} else {
this.pSelected = event;
this.buildValeursControls();
}
}
private buildValeursControls(){
this.pSelected.forEach(p => {
const VarFormControl = this.fb.control(null);
this.valeursControls.push({
valeur: { n: p, r: this.B.r },
formControl: VarFormControl
});
this.actionFormGroup.addControl(p, VarFormControl );
});
}
private buildForm() {
this.submitted = false;
this.p= this.fb.control('', Validators.required);
this.actionFormGroup = this.fb.group({
p: this.p
});
}