Forms Angular 2模板驱动表单-数组输入元素

我已经挣扎了一天半，仍然找不到任何解决问题的方法。我正在处理一个简单的表单，它有

select

和

复选框

元素。当我尝试提交表单时，我没有得到

select

和

复选框

的值，而是在控制台中得到true。 我正在开发模板驱动的表单

<form (ngSubmit)="addSubcontractor(subcontractorForm)" #subcontractorForm="ngForm">
      <h5>Type :</h5>
         <div class="form-group">
             <div *ngFor="let contractor_type of contractor_types;let i = index;" class="pull-left margin-right">
             <label htmlFor="{{ contractor_type | lowercase }}">
                            {{ contractor_type }} :
            </label>
            <input type="checkbox" name="_contractor_type[{{i}}]" [value]="contractor_type" ngModel>
        </div>
    <div class="form-group">
        <select class="form-control costcodelist" name="_cc_id[]"  multiple="true" ngModel>
        //When I put ngModel on select I just keep getting error
        //TypeError: values.map is not a function
           <option *ngFor="let costcode of costcodes" [selected]="costcode.id == -1" [value]="costcode.id">{{ costcode.costcode_description }}</option>
         </select>
    </div>
   </form>

    <form #f="ngForm" (submit)="addOperator(f.valid)" novalidate>
        <label>Name</label>

        <input [(ngModel)]="operator.name" name="name">
        <label >Service</label>
        <select #service="ngModel" name="service" [(ngModel)]="operator.service">
            <option *ngFor='let service of services' [ngValue]='service'>{{service.name}}</option>
        </select>

        <label >Enabled</label>
        <label>
            <input type="checkbox" name="enabled" [(ngModel)]="operator.enabled">
        </label>

        <button type="submit">Create Operator</button>
    </form>

当我从

select

元素中删除

ngModel

时，代码运行良好，当我提交表单时，我得到以下输出

_contractor_type[0]:true
_contractor_type[1]:true
_contractor_type[2]:true 
_contractor_type[3]:""

我没有从select元素中获取复选框值以及所选选项

您的意见和答复将不胜感激

---

谢谢

这里是一个简单的选择，我在模板驱动表单中使用它

<form (ngSubmit)="addSubcontractor(subcontractorForm)" #subcontractorForm="ngForm">
      <h5>Type :</h5>
         <div class="form-group">
             <div *ngFor="let contractor_type of contractor_types;let i = index;" class="pull-left margin-right">
             <label htmlFor="{{ contractor_type | lowercase }}">
                            {{ contractor_type }} :
            </label>
            <input type="checkbox" name="_contractor_type[{{i}}]" [value]="contractor_type" ngModel>
        </div>
    <div class="form-group">
        <select class="form-control costcodelist" name="_cc_id[]"  multiple="true" ngModel>
        //When I put ngModel on select I just keep getting error
        //TypeError: values.map is not a function
           <option *ngFor="let costcode of costcodes" [selected]="costcode.id == -1" [value]="costcode.id">{{ costcode.costcode_description }}</option>
         </select>
    </div>
   </form>

    <form #f="ngForm" (submit)="addOperator(f.valid)" novalidate>
        <label>Name</label>

        <input [(ngModel)]="operator.name" name="name">
        <label >Service</label>
        <select #service="ngModel" name="service" [(ngModel)]="operator.service">
            <option *ngFor='let service of services' [ngValue]='service'>{{service.name}}</option>
        </select>

        <label >Enabled</label>
        <label>
            <input type="checkbox" name="enabled" [(ngModel)]="operator.enabled">
        </label>

        <button type="submit">Create Operator</button>
    </form>

---

这里是一个简单的选择，我使用我的模板驱动表单

<form (ngSubmit)="addSubcontractor(subcontractorForm)" #subcontractorForm="ngForm">
      <h5>Type :</h5>
         <div class="form-group">
             <div *ngFor="let contractor_type of contractor_types;let i = index;" class="pull-left margin-right">
             <label htmlFor="{{ contractor_type | lowercase }}">
                            {{ contractor_type }} :
            </label>
            <input type="checkbox" name="_contractor_type[{{i}}]" [value]="contractor_type" ngModel>
        </div>
    <div class="form-group">
        <select class="form-control costcodelist" name="_cc_id[]"  multiple="true" ngModel>
        //When I put ngModel on select I just keep getting error
        //TypeError: values.map is not a function
           <option *ngFor="let costcode of costcodes" [selected]="costcode.id == -1" [value]="costcode.id">{{ costcode.costcode_description }}</option>
         </select>
    </div>
   </form>

    <form #f="ngForm" (submit)="addOperator(f.valid)" novalidate>
        <label>Name</label>

        <input [(ngModel)]="operator.name" name="name">
        <label >Service</label>
        <select #service="ngModel" name="service" [(ngModel)]="operator.service">
            <option *ngFor='let service of services' [ngValue]='service'>{{service.name}}</option>
        </select>

        <label >Enabled</label>
        <label>
            <input type="checkbox" name="enabled" [(ngModel)]="operator.enabled">
        </label>

        <button type="submit">Create Operator</button>
    </form>

---

关于

multi-select

元素，还有它是双向数据绑定，在我的情况下，这是相当不好的。对于multi-select im，使用MIT许可证的

angular-2-dropdown-multiselect

dependencie：所以这实际上是一个问题，有了这个dependencie，你可以根据需要设置样式，所以这不是一个大问题。如果你想，我可以用

angular-2-dropdown-multiselect

的实现编辑答案，那么

multi-select

元素呢，而且它是双向数据绑定，在我的情况下，这对multi-select im很不好，使用

angular-2-dropdown-multiselect

dependencie和MIT许可证：所以这实际上是个问题是的，有了这个dependencie，你可以随心所欲地设计它，所以这不是什么大问题。如果需要，我可以使用

angular-2-dropdown-multiselect