我正在根据从api ....获得的数据动态创建复选框和相关的下拉列表。
我的HTML代码如下::
<label [for]="i" class="form-check-label fw7 h5 mb0" formArrayName="planDivList" *ngFor="let plan of planForm.controls.planDivList.controls; let i = index">
<br>
<input [name]="i" [id]="i" class="form-check-input" type="checkbox" [formControlName]="i">
{{planDivList[i].planCode}}
<label *ngIf="planDivList[i].divisions.length > 0" for="inputDiv">
Divisions
<select id="inputDiv" formcontrolName='divCtrl'>
<option *ngFor="let division of planDivList[i].divisions" Value="division.divisionCode">
{{division.divisionName}}
</option>
</select>
</label>
</label>
我的数据集是
planDivList = [
{ planCode: "B3692", divisions: [] },
{ planCode: "B3693", divisions: [] },
{ planCode: "B67", divisions: [{ divisionCode: "2", divisionName: "Assisted Living " }, { divisionCode: "1", divisionName: "LILC" }] },
{ planCode: "B69", divisions: [{ divisionCode: "3", divisionName: "Four Seasons" }, { divisionCode: "2", divisionName: "Lakeside" }, { divisionCode: "1", divisionName: "Sunrise" }] }
];
ts文件:
const selectedPlans = this.planForm.value.planDivList
.map((checked, index) => (checked ? this.planDivList[index].planCode : null))
.filter(value => value !== null);
console.log(selectedPlans);
这是我的闪电战
https://stackblitz.com/edit/angular-fsgswa?file=src%2Fapp%2Fapp.component.ts
我能够获得选定的复选框值。但是我如何获取在提交按钮中为该复选框选择的相应部门的值?任何帮助表示赞赏
您有一组数据,每个项目都应具有多个控件(复选框和选择框)。这需要表单组的表单数组。
我们稍后将需要引用嵌套的表单控件值,因此请将它们存储在属性中以方便参考。
form: FormArray;
private formControls: {
checkbox: FormControl;
division: FormControl;
}[];
// initialise component in ngOnInit instead of constructor
ngOnInit() {
this.formControls = this.plans.map((plan, i) => {
const divisionCode = plan.divisions.length > 0
? plan.divisions[0].divisionCode
: '';
return {
checkbox: this.fb.control(i === 0),
division: this.fb.control(divisionCode)
};
});
const formGroups = this.formControls.map(x => this.fb.group(x));
this.form = this.fb.array(formGroups, this.minSelectedCheckboxes(1));
}
2。将HTML绑定到表单
您应该更喜欢通过使用(submit)
而不是按钮(click)
处理表单提交。(submit)
将处理可以提交表单的所有方式。HTML绑定与我们构建的表单的结构匹配。请注意复选框和分隔控件如何绑定到数组中的第
i
个表单组。我还建议您尽可能使用您的模型来生成循环,并将表单绑定限制为表单控制指令。
<form [formGroup]="form" (submit)="onSubmit()"> <div *ngFor="let plan of plans; index as i" [formGroupName]="i"> <label> <input type="checkbox" formControlName="checkbox"> {{plan.planCode}} </label> <label *ngIf="plan.divisions.length > 0" > Divisions <select formControlName="division"> <option *ngFor="let division of plan.divisions" [value]="division.divisionCode"> {{division.divisionName}} </option> </select> </label> </div> <div *ngIf="formInvalid && form.hasError('required')"> At least one plan must be selected </div> <button>Enroll</button> </form>
3。处理提交
现在只是查询表单控制数组以找出要检查的对象以及所选择的相关部门代码在什么位置相关的情况。
onSubmit(){ this.formInvalid = this.form.invalid; if (this.formInvalid) { return; } this.selectedPlans = this.plans .map((plan, i) => ({ planCode: plan.planCode, selected: this.formControls[i].checkbox.value, divisionCode: this.formControls[i].division.value })) .filter(x => x.selected); }
您所需的实际输出可能会与我的示例稍有不同,为了更简单的演示,我重命名了一些属性。希望我已经演示了可以应用于您自己的表单的技术。
DEMO:https://stackblitz.com/edit/angular-qxm8wk