我希望在单击“添加”按钮时添加一次选择选项和输入文本字段。
我已经实现了这一点。没关系。
当我单击添加服务按钮时,需要添加相关行中的输入文本字段。
现在,每次我单击时,它都会为每一行分配一个字段。单击后,每行有 2 个“服务”字段。当我点击两次时,每行有 3 个“服务”字段。
当我单击删除服务按钮时,它会从每一行中删除一行,显示出类似的行为。如何确保相关行发生这些操作?
“添加服务”和“删除服务”按钮无法正常工作。
keyValueFA = new FormArray([this.newKeyValueFG]);
keyServFA = new FormArray([this.newServFG]);
propertyFG = new FormGroup({
keyValue: this.keyValueFA,
//serv:this.keyServFA
});
get newKeyValueFG(): FormGroup {
return new FormGroup({
prof: new FormControl(null),
//serv: new FormControl(null),
});
}
get newServFG(): FormGroup {
return new FormGroup({
serv: new FormControl(null),
});
}
get keyValueArrayFGControls(): FormGroup[] {
return this.keyValueFA.controls as FormGroup[];
}
get keyValueArrayFGControlss(): FormGroup[] {
return this.keyServFA.controls as FormGroup[];
}
addNewKeyValueFG(): void {
this.keyValueFA.push(this.newKeyValueFG);
}
addNewServFG(): void {
this.keyServFA.push(this.newServFG);
}
removeNewKeyValueFG(index: number): void {
this.keyValueFA.removeAt(index);
}
removeNewServFG(index: number): void {
this.keyServFA.removeAt(index);
}
<form [formGroup]="propertyFG">
<div formArrayName="keyValue" *ngFor="let fg of keyValueArrayFGControls; let i = index">
<div [formGroup]="fg">
<div class="col-4">
<select formControlName="prof" width="100%" class="form-control">
<option *ngFor="let l of professions;" [value]="l._id">
{{getProfessionNameByLang(l.name)}}
</option>
</select>
</div>
<div *ngFor="let sr of keyValueArrayFGControlss; let j = index" class="col-4">
<div [formGroup]="sr">
<input type="text" formControlName="serv" [id]="'myDiv-' + i+ j" placeholder="Hizmet" />
<button (click)="removeNewServFG(j)">Remove Serv</button>
</div>
</div>
<button (click)="removeNewKeyValueFG(i)">Remove</button>
<button (click)="addNewServFG()">Add Serv</button>
</div>
</div>
<button (click)="addNewKeyValueFG()">Add</button>
</form>
最佳答案
您为每个 FormGroup 共享相同的 FormArray
实例 keyServFA
。相反,每个 FormGroup
应该有自己的 keyServFA
/services
FormArray
。
<ng-container formArrayName="services">
<div
*ngFor="let sr of serviceControlsByKeyValueFG(i).controls; let j = index"
class="col-4"
>
<div [formGroupName]="j">
<input
type="text"
formControlName="serv"
[id]="'myDiv-' + i+ j"
placeholder="Hizmet"
/>
<button (click)="removeNewServFG(i, j)">Remove Serv</button>
</div>
</div>
</ng-container>
<button (click)="removeNewKeyValueFG(i)">Remove</button>
<button (click)="addNewServFG(i)">Add Serv</button>
添加、检索或删除服务 FormGroup
时,您应该提供 keyValueFG
的索引,以获取正确的 keyValueFG
表单组
。
get newKeyValueFG(): FormGroup {
return new FormGroup({
prof: new FormControl(null),
services: new FormArray([this.newServFG]),
});
}
serviceControlsByKeyValueFG(rootIndex: number): FormArray {
return (this.keyValueFA.controls[rootIndex] as FormGroup).controls[
'services'
] as FormArray;
}
addNewServFG(rootIndex: number): void {
this.serviceControlsByKeyValueFG(rootIndex).push(this.newServFG);
}
removeNewServFG(rootIndex: number, index: number): void {
this.serviceControlsByKeyValueFG(rootIndex).removeAt(index);
}
关于html - 如何创建嵌套的动态表单元素,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/77436131/