Angular2 - 表格指令不起作用

Question

我刚刚开始在Angular2工作。现在，我在向Form添加表单指令时遇到问题。我关注了html表单。为了简单起见，我只是在这里放置必要的字段。我已将我的组件命名为类别。
以下是类别模型

export class Category {
    Title: string;    
    Description: string;

    constructor(Title: string, Description: string) {
        this.Title = Title;
        this.Description = Description;
    }   
}

以下是 category.template 文件

<form #form="ngForm" (ngSubmit)="onSubmit()" novalidate>

    <div class="form-group">
        <label>Title</label>
        <input [(ngModel)]="model.Title" #title="ngModel" name="title" id="title" type="text" class="form-control" value="">
    </div>

    <div class="form-group">
        <label>Description</label>
        <textarea [(ngModel)]="model.Description" #description="ngModel" class="summernote form-control" name="description" id="description"></textarea>
    </div>

</form>

以下是 category.component

import { Component } from '@angular/core';
import { FormBuilder} from '@angular/forms';
import { Category } from '../../../models/cms/Category';

@Component({
    selector: 'category',
    templateUrl: 'category.template.html'
})
export class CategoryComponent{

    model = new Category("dummyTitle","dummyDescription");

    onSubmit() {
        console.log(this.data);
    }   
}

这是我得到的错误。

Template parse errors:
There is no directive with "exportAs" set to "ngForm" ("


    <form [ERROR ->]#form="ngForm" (ngSubmit)="onSubmit()" novalidate>

请帮我解决此错误。