Angular 表单控件示例代码

更新时间：2020-05-20 09:30:01 作者：startmvc

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

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


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);
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。