本文介绍了在Angular中将addControl动态添加到FormGroup的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何在Angular中动态地将FormControl添加到FormGroup?
How can I add a FormControl to a FormGroup dynamically in Angular?
例如,我想添加一个强制控件,该控件的名称为"new".其默认值为.
For example,I would like to add a mandatory control which name is "new" and its default value is ''.
推荐答案
addControl
是您所需要的.请注意,第二个参数必须是这样的FormControl实例:
addControl
is what you need. Please note the second parameters must be a FormControl instance like so:
this.testForm.addControl('new', new FormControl('', Validators.required));
如果需要,还可以使用 setValidators
动态添加验证器.方法.调用此选项会覆盖所有现有的同步验证器.
You can also add the validators dynamically if you want with the setValidators
method. Calling this overwrites any existing sync validators.
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