我已经试着从这里效仿其他答案，但我没有成功!
我创建了一个响应式表单(即，动态)，我想在任何给定的时间禁用一些字段。我的表单代码:
this.form = this._fb.group({
name: ['', Validators.required],
options: this._fb.array([])
});
const control = <FormArray>this.form.controls['options'];
control.push(this._fb.group({
value: ['']
}));
我的html:
<div class='row' formArrayName="options">
<div *ngFor="let opt of form.controls.options.controls; let i=index">
<div [formGroupName]="i">
<select formArrayName="value">
<option></option>
<option>{{ opt.controls.value }}</option>
</select>
</div>
</div>
</div>
为了方便起见，我简化了代码。我想禁用类型选择字段。我试着这样做:
form = new FormGroup({
first: new FormControl({value: '', disabled: true}, Validators.required),
});
不工作!有人有什么建议吗?
角度 14+
field = new FormControl<any>()
readonly formGroup = new FormGroup<any>({
field2: new FormControl<any>(),
});
选项1
ngOnInit() {
# ...
this.field.setDisable();
this.field.setEnable();
this.formGroup.controls.field2.setEnable();
this.formGroup.controls.field2.setDisabled();
# ...
}
选项2
private setFieldEnabled() {
this.field.setEnable()
}
private setFieldDisabled() {
this.field.setDisable()
}
private setField2Enabled() {
this.formGroup.controls.breakdown.setEnable();
}
private setField2Disabled() {
this.formGroup.controls.breakdown.setDisable();
}
setEnableOrDisableFields(truth: boolean): void {
if (truth) {
this.setFieldEnabled()
this.setField2Enabled();
return
}
this.setFieldDisabled()
this.setField2Disabled();
}
使响应式形式angular 2+的字段禁用和启用
1.禁用
添加[attr。Disabled]="true"输入。
<input class=“form-control” name=“Firstname” formControlName=“firstname” [attr.disabled]=“true”>
要启用
export class InformationSectionComponent {
formname = this.formbuilder.group({
firstname: ['']
});
}
启用整个表单
this.formname.enable ();
单独启用特定字段
this.formname.controls.firstname.enable ();
same for disable, replace enable() with disable().
这很好。查询的注释。
最好的解决方案是:
https://netbasal.com/disabling-form-controls-when-working-with-reactive-forms-in-angular-549dd7b42110
解决方案大纲(如果断开链接):
(1)创建指令
import { NgControl } from '@angular/forms';
@Directive({selector: '[disableControl]'})
export class DisableControlDirective {
@Input() set disableControl( condition : boolean ) {
const action = condition ? 'disable' : 'enable';
this.ngControl.control[action]();
}
constructor( private ngControl : NgControl ) {}
}
像这样使用它
<input [formControl]="formControl" [disableControl]="condition">
(3)由于禁用的输入不显示在表单中。值提交时，您可能需要使用以下代替(如果需要):
onSubmit(form) {
const formValue = form.getRawValue() // gets form.value including disabled controls
console.log(formValue)
}
