如何制作Angularjs4.0表单

幽梦林子 · 发表于 2017-8-11 10:31:54

本帖最后由幽梦林子于 2017-8-11 15:24 编辑

如何制作Angularjs4.0表单，具体操作如下：

一、创建表单Hero 模型类

src/app/hero.ts //文件路径
export class Hero {
constructor(
public id: number,
public name: string,
public power: string,
public alterEgo?: string
) { }
}

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二、创建表单控制器

1.创建组件

src/app/hero-form.component.ts //文件路径
import { Component } from '@angular/core';
import { Hero } from './hero';
@Component({
selector: 'hero-form',
templateUrl: './hero-form.component.html'
})
export class HeroFormComponent {
powers = ['Really Smart', 'Super Flexible',
'Super Hot', 'Weather Changer'];
model = new Hero(18, 'Dr IQ', this.powers[0], 'Chuck Overstreet');
submitted = false;
onSubmit() { this.submitted = true; }
// TODO: Remove this when we're done
get diagnostic() { return JSON.stringify(this.model); }
newHero() { this.model = new Hero(42, '', '');}
}

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2.导入组件

src/app/app.module.ts //文件路径
import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { HeroFormComponent } from './hero-form.component';
@NgModule({
imports: [
BrowserModule,
FormsModule
],
declarations: [
AppComponent,
HeroFormComponent
],
bootstrap: [ AppComponent ]
})
export class AppModule { }
3.修改 app.component.ts根组件
src/app/app.component.ts //文件路径
import { Component } from '@angular/core';
@Component({
selector: 'my-app',
template: ''
})
export class AppComponent { }

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三、创建视图，初始 HTML 表单模板

src/app/hero-form.component.html //文件路径
<link rel="stylesheet" href="https://unpkg.com/bootstrap@3.3.7/dist/css/bootstrap.min.css">
<style>
//定义css
.ng-valid[required], .ng-valid.required {
border-left: 5px solid #42A948; /* green */
}
.ng-invalid:not(form) {
border-left: 5px solid #a94442; /* red */
}
</style>
<div class="container">
<div [hidden]="submitted">
<h1>Hero Form</h1>
<form (ngSubmit)="onSubmit()" #heroForm="ngForm"> //ngSubmit表单提交
<div class="form-group">
<label for="name">Name</label>
<input type="text" class="form-control" id="name"
required
[(ngModel)]="model.name" name="name" //ngModel数据双向绑定
#name="ngModel">
<div [hidden]="name.valid || name.pristine"
class="alert alert-danger">
Name is required
</div>
</div>
<div class="form-group">
<label for="alterEgo">Alter Ego</label>
<input type="text" class="form-control" id="alterEgo"
[(ngModel)]="model.alterEgo" name="alterEgo">
</div>
<div class="form-group">
<label for="power">Hero Power</label>
<select class="form-control" id="power"
required
[(ngModel)]="model.power" name="power"
#power="ngModel">
<option *ngFor="let pow of powers" [value]="pow">{{pow}}</option>
</select>
<div [hidden]="power.valid || power.pristine" class="alert alert-danger"> //表单字段验证
Power is required
</div>
</div>
<button type="submit" class="btn btn-success" [disabled]="!heroForm.form.valid">Submit</button>
<button type="button" class="btn btn-default" (click)="newHero(); heroForm.reset()">New Hero</button>
</form>
</div>
<div [hidden]="!submitted">
<h2>You submitted the following:</h2>
<div class="row">
<div class="col-xs-3">Name</div>
<div class="col-xs-9 pull-left">{{ model.name }}</div>
</div>
<div class="row">
<div class="col-xs-3">Alter Ego</div>
<div class="col-xs-9 pull-left">{{ model.alterEgo }}</div>
</div>
<div class="row">
<div class="col-xs-3">Power</div>
<div class="col-xs-9 pull-left">{{ model.power }}</div>
</div>
<br>
<button class="btn btn-primary" (click)="submitted=false">Edit</button>
</div>
</div>

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四、ngModel表单Angular CSS 类来更新控件

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如何制作Angularjs4.0表单

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