本文将介绍 Angular Template-driven 表单中，常用控件的使用。涉及的表单控件如下：

text

number

radio

select (基本类型)

select (对象)

multi select

cascading select (级联操作)

checkbox (boolean)

multi checkbox

表单的局部效果

数据接口

export interface User { name: string; // 名字 age?: number; // 年龄 gender?: string; // 性别 role?: string; // 角色 theme?: Theme; // 主题 isActive?: boolean; // 是否激活 hobbies?: {[key: string]: boolean}; // 爱好 topics?: string[]; // 话题 province: number; // 省 city: number; // 市}export interface Theme { display: string; // 显示文本 backgroundColor: string; // 背景颜色 fontColor: string; // 字体颜色}

控件使用示例

Text

<div class="form-group"> <label>名字</label> <input type="text" class="form-control" name="name" [(ngModel)]="user.name"></div>

Number

<div class="form-group"> <label>年龄</label> <input type="number" class="form-control" name="age" [(ngModel)]="user.age"></div>

Radio

数据

genders = [{ value: 'F', display: '女' },{ value: 'M', display: '男' }];

模板

<div class="form-group"> <label>性别</label> <label *ngFor="let gender of genders;"> <input type="radio" name="gender" [(ngModel)]="user.gender" [value]="gender.value"> {{gender.display}} </label></div>

Select - 基本类型

数据

复制代码 代码如下:
roles = [{ value: 'admin', display: '管理员' },{ value: 'user', display: '普通用户' }];

模板

<div class="form-group"> <label>角色</label> <select name="role" class="form-control" [(ngModel)]="user.role"> <option *ngFor="let role of roles" [value]="role.value"> {{role.display}} </option> </select></div>

Select - 对象

数据

themes: Theme[] = [ { backgroundColor: 'black', fontColor: 'white', display: '黑色' }, { backgroundColor: 'white', fontColor: 'black', display: '白色' }, { backgroundColor: 'grey', fontColor: 'white', display: '灰色' }];

模板

<div class="form-group"> <label>主题</label> <select name="theme" class="form-control" [(ngModel)]="user.theme"> <option *ngFor="let theme of themes" [ngValue]="theme"> {{theme.display}} </option> </select></div>

Mulit Select

数据

topics = [ { value: 'game', display: '游戏' }, { value: 'tech', display: '科技' }, { value: 'life', display: '生活' }];

模板

<div class="form-group"> <label>话题</label> <select multiple name="topics" class="form-control" [(ngModel)]="user.topics"> <option *ngFor="let topic of topics" [value]="topic.value"> {{topic.display}} </option> </select></div>

Cascading Select - 级联操作

数据

provinces = [ {pk:1,pv:'北京'}, {pk:16,pv:'福建'} ];citieData = [ {pk:1,ck:72,cv:'朝阳区'},{pk:1,ck:2800,cv:'海淀区'}, {pk:1,ck:2801,cv:'西城区'},{pk: 16,ck: 1303,cv: '福州市'}, {pk: 16,ck: 1315,cv: '厦门市'},{pk: 16,ck: 1332,cv: '泉州市'}];cities = this.citieData.filter(city => city.pk === 16); // 默认福建省

模板

<div class="form-group"> <label>地址</label> <select name="province" class="form-control" [(ngModel)]="user.province" (change)="changeProvince($event.target.value)"> <option *ngFor="let province of provinces" [value]="province.pk"> {{province.pv}} </option> </select> <select name="city" class="form-control" [(ngModel)]="user.city"> <option *ngFor="let city of cities" [value]="city.ck"> {{city.cv}} </option> </select></div>

Checkbox

模板

<div class="form-group"> <div class="checkbox"> <label> <input type="checkbox" name="isActive" [(ngModel)]="user.isActive"> 是否激活 </label> </div></div>

Multi Checkbox

数据

hobbies = [ { value: 'reading', display: '看书' }, { value: 'music', display: '听歌' }, { value: 'movie', display: '电影' }];

模板

<div class="form-group"> <label>爱好</label> <span *ngFor="let hobby of hobbies"> <input type="checkbox" name="bobby" [value]="hobby.value" [checked]="user.hobbies[hobby.value]" (change)="changeHobby(hobby, $event)" /> {{hobby.display}} </span></div>

完整示例

模板

<h4>{{title}}</h4><form #f="ngForm" novalidate> <div class="form-group"> <label>名字</label> <input type="text" class="form-control" name="name" [(ngModel)]="user.name"> </div> <div class="form-group"> <label>年龄</label> <input type="number" class="form-control" name="age" [(ngModel)]="user.age"> </div> <div class="form-group"> <label>性别</label> <label *ngFor="let gender of genders;"> <input type="radio" name="gender" [(ngModel)]="user.gender" [value]="gender.value"> {{gender.display}} </label> </div> <div class="form-group"> <label>角色</label> <select name="role" class="form-control" [(ngModel)]="user.role"> <option *ngFor="let role of roles" [value]="role.value"> {{role.display}}</option> </select> </div> <div class="form-group"> <label>主题</label> <select name="theme" class="form-control" [(ngModel)]="user.theme"> <option *ngFor="let theme of themes" [ngValue]="theme"> {{theme.display}} </option> </select> </div> <div class="form-group"> <div class="checkbox"> <label> <input type="checkbox" name="isActive" [(ngModel)]="user.isActive"> 是否激活 </label> </div> </div> <div class="form-group"> <label>话题</label> <select multiple name="topics" class="form-control" [(ngModel)]="user.topics"> <option *ngFor="let topic of topics" [value]="topic.value"> {{topic.display}} </option> </select> </div> <div class="form-group"> <label>爱好</label> <span *ngFor="let hobby of hobbies"> <input type="checkbox" name="bobby" [value]="hobby.value" [checked]="user.hobbies[hobby.value]" (change)="changeHobby(hobby, $event)" /> {{hobby.display}} </span> </div> <div class="form-group"> <label>地址</label> <select name="province" class="form-control" [(ngModel)]="user.province" (change)="changeProvince($event.target.value)"> <option *ngFor="let province of provinces" [value]="province.pk"> {{province.pv}} </option> </select> <select name="city" class="form-control" [(ngModel)]="user.city"> <option *ngFor="let city of cities" [value]="city.ck">{{city.cv}}</option> </select> </div> <button type="submit" (click)="save()" class="btn btn-default">保存</button></form>

组件类

export class AppComponent implements OnInit { title = '新增用户'; user: User; genders = [{ value: 'F', display: '女' },{ value: 'M', display: '男' }]; roles = [{ value: 'admin', display: '管理员' },{ value: 'user', display: '普通用户' }]; themes: Theme[] = [ { backgroundColor: 'black', fontColor: 'white', display: '黑色' }, { backgroundColor: 'white', fontColor: 'black', display: '白色' }, { backgroundColor: 'grey', fontColor: 'white', display: '灰色' } ]; topics = [ { value: 'game', display: '游戏' }, { value: 'tech', display: '科技' }, { value: 'life', display: '生活' } ]; hobbies = [ { value: 'reading', display: '看书' }, { value: 'music', display: '听歌' }, { value: 'movie', display: '电影' } ]; provinces = [ {pk:1,pv:'北京'}, {pk:16,pv:'福建'} ]; citieData = [ {pk:1,ck:72,cv:'朝阳区'},{pk:1,ck:2800,cv:'海淀区'}, {pk:1,ck:2801,cv:'西城区'},{pk: 16,ck: 1303,cv: '福州市'}, {pk: 16,ck: 1315,cv: '厦门市'},{pk: 16,ck: 1332,cv: '泉州市'} ]; cities = this.citieData.filter(city => city.pk === 16); changeHobby(hobby, event) { this.user.hobbies[hobby.value] = event.target.checked; } changeProvince(pk) { this.cities = this.citieData.filter((city)=> city.pk == pk); this.user.city = this.cities[0].ck; } ngOnInit(): void { this.user = { name: '', gender: this.genders[0].value, role: this.roles[1].value, theme: this.themes[0], isActive: false, hobbies: {'music': true}, topics: [this.topics[1].value], province: 16, // 福建省 city: 1315 // 厦门市 } } save() { console.log(this.user); }}

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