angular form set dynamic control(form动态设置control)

实现效果

form表单控件的实时更新
效果如图

关键代码

validateForm: FormGroup;    // 表单校验
constructor(
    private fb: FormBuilder
) { 
    this.validateForm = this.fb.group({

    });
}
// 这里有一个控件数组，包含控件的显示名称、属性名和控件类型
this.properties=[
    {nameChain:'account',controlType:0,displayName:'账号'},
    {nameChain:'password',controlType:1,displayName:'密码'},
];
// 先清理之前的控件
this.validateForm.clearValidators();
this.properties.forEach(property => {
    // 根据新控件数组，插入控件
    this.validateForm.addControl(property.nameChain, this.fb.control(null, Validators.required));
});

前端循环properties，填充控件即可

<form nz-form [formGroup]="validateForm">
    <nz-form-item *ngFor="let property of properties">
        <nz-form-label [nzSm]="2" [nzXs]="2" nzRequired>{{property.displayName}}</nz-form-label>
        <!--输入框-->
        <nz-form-control [nzSm]="4" [nzXs]="4" *ngIf="property.controlType==0">
            <input nz-input [formControlName]="property.nameChain" type="text" class="form-control" name="{{property.nameChain}}" [(ngModel)]="dataObj[property.nameChain]">
        </nz-form-control>
        <!--密码框-->
        <nz-form-control [nzSm]="4" [nzXs]="4" *ngIf="property.controlType==1">
            <input nz-input type="password" [formControlName]="property.nameChain" class="form-control" name="{{property.nameChain}}" [(ngModel)]="dataObj[property.nameChain]">
        </nz-form-control>
        <!--下拉框-->
        <nz-form-control [nzSm]="4" [nzXs]="4" *ngIf="property.controlType==2">
            <nz-select [(ngModel)]="dataObj[property.nameChain]" class="form-control" name="modules" [formControlName]="property.nameChain">
                <nz-option *ngFor="let city of cities" [nzValue]="city.id" [nzLabel]="city.name">
                </nz-option>
            </nz-select>
        </nz-form-control>
    </nz-form-item>
</form>

示例代码

https://github.com/zLulus/NotePractice/tree/dev3/Website/DotNetCore/CoreNgAlain/src/app/routes/form-set-dynamic-control

参考资料

https://stackoverflow.com/questions/36627573/angular2-form-controlgroup-who-hold-an-undefined-number-of-control/36641967#36641967