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我试图在我的 HTML 模板中表示一个表单构建器:

     this.form = fb.group({
        HTTPMethod: [],

        processes: fb.group({
        Process: fb.group({
            id: []
        })
       })

对于 HTTPMethod,我这样做是这样的:

<div class="form-group">
        <label for="HTTPMethod">Http Method</label>
        <select
            ngControl="HTTPMethod" 
            #frequency="ngForm" 
            id="HTTPMethod" 
            class="form-control" 
            required>
            <option value="3"></option>
            <option *ngFor="#HTTPMethod of HTTPMethods" value="{{ HTTPMethod.label }}">
                {{ HTTPMethod.label }}
            </option>
        </select> 
    </div>

但是我无法表示它的进程,我遇到了错误: control.registerOnChange 不是 [processes in ] 中的函数,这是我的进程HTML 表示:

<div class="form-group">
        <label for="processes">Process List</label>
        <select
            ngControl="processes" 
            #frequency="ngForm" 
            id="processes" 
            class="form-control" required>
            <option value=""></option>
            <option *ngFor="#process of processes?.processList.list" 
            value="{{ process.id }}">
                {{ process.id }}
            </option>
        </select> 
    </div>

先谢谢各位朋友了!!!

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