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- <h4 id=" 实例展示"> 实例展示</h4>
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- <pre><code class="lang-html"><span class="hljs-comment"><!-- hero-from.component.html --></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"container"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> [<span class="hljs-attr">hidden</span>]=<span class="hljs-string">"submitted"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">h4</span>></span>Hero Form<span class="hljs-tag"></<span class="hljs-name">h4</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">form</span> (<span class="hljs-attr">ngSubmit</span>)=<span class="hljs-string">"onSubmit()"</span> #<span class="hljs-attr">heroForm</span>=<span class="hljs-string">"ngForm"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"form-group"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">for</span>=<span class="hljs-string">"name"</span>></span>Name<span class="hljs-tag"></<span class="hljs-name">label</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">input</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text"</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"form-control"</span> <span class="hljs-attr">id</span>=<span class="hljs-string">"name"</span>
- <span class="hljs-attr">required</span>
- [(<span class="hljs-attr">ngModel</span>)]=<span class="hljs-string">"model.name"</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"name"</span>
- #<span class="hljs-attr">name</span>=<span class="hljs-string">"ngModel"</span>></span>
- <span class="hljs-comment"><!--判读用户是否输入了表单内容--></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> [<span class="hljs-attr">hidden</span>]=<span class="hljs-string">"name.valid || name.pristine"</span>
- <span class="hljs-attr">class</span>=<span class="hljs-string">"alert alert-danger"</span>></span>
- Name is required
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"form-group"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">for</span>=<span class="hljs-string">"alterEgo"</span>></span>Alter Ego<span class="hljs-tag"></<span class="hljs-name">label</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">input</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text"</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"form-control"</span> <span class="hljs-attr">id</span>=<span class="hljs-string">"alterEgo"</span>
- [(<span class="hljs-attr">ngModel</span>)]=<span class="hljs-string">"model.alterEgo"</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"alterEgo"</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"form-group"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">for</span>=<span class="hljs-string">"power"</span>></span>Hero Power<span class="hljs-tag"></<span class="hljs-name">label</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">select</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"form-control"</span> <span class="hljs-attr">id</span>=<span class="hljs-string">"power"</span>
- <span class="hljs-attr">required</span>
- [(<span class="hljs-attr">ngModel</span>)]=<span class="hljs-string">"model.power"</span> <span class="hljs-attr">name</span>=<span class="hljs-string">"power"</span>
- #<span class="hljs-attr">power</span>=<span class="hljs-string">"ngModel"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">option</span> *<span class="hljs-attr">ngFor</span>=<span class="hljs-string">"let pow of powers"</span> [<span class="hljs-attr">value</span>]=<span class="hljs-string">"pow"</span>></span>{{pow}}<span class="hljs-tag"></<span class="hljs-name">option</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">select</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> [<span class="hljs-attr">hidden</span>]=<span class="hljs-string">"power.valid || power.pristine"</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"alert alert-danger"</span>></span>
- Power is required
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">button</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"submit"</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"btn btn-success"</span> [<span class="hljs-attr">disabled</span>]=<span class="hljs-string">"!heroForm.form.valid"</span>></span>Submit<span class="hljs-tag"></<span class="hljs-name">button</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">button</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"button"</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"btn btn-default"</span> (<span class="hljs-attr">click</span>)=<span class="hljs-string">"newHero(); heroForm.reset()"</span>></span>New Hero<span class="hljs-tag"></<span class="hljs-name">button</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">form</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> [<span class="hljs-attr">hidden</span>]=<span class="hljs-string">"!submitted"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">h2</span>></span>You submitted the following:<span class="hljs-tag"></<span class="hljs-name">h2</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"row"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"col-xs-3"</span>></span>Name<span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"col-xs-9 pull-left"</span>></span>{{ model.name }}<span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"row"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"col-xs-3"</span>></span>Alter Ego<span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"col-xs-9 pull-left"</span>></span>{{ model.alterEgo }}<span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"row"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"col-xs-3"</span>></span>Power<span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"col-xs-9 pull-left"</span>></span>{{ model.power }}<span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">br</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">button</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"btn btn-primary"</span> (<span class="hljs-attr">click</span>)=<span class="hljs-string">"submitted=false"</span>></span>Edit<span class="hljs-tag"></<span class="hljs-name">button</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- </code></pre>
- <pre><code class="lang-css"><span class="hljs-comment">/*hero-from.component.css*/</span>
- <span class="hljs-selector-class">.ng-valid</span><span class="hljs-selector-attr">[required]</span>, <span class="hljs-selector-class">.ng-valid</span><span class="hljs-selector-class">.required</span> {
- <span class="hljs-attribute">border-left</span>: <span class="hljs-number">5px</span> solid <span class="hljs-number">#42A948</span>; <span class="hljs-comment">/* green */</span>
- }
- <span class="hljs-selector-class">.ng-invalid</span><span class="hljs-selector-pseudo">:not(form)</span> {
- <span class="hljs-attribute">border-left</span>: <span class="hljs-number">5px</span> solid <span class="hljs-number">#a94442</span>; <span class="hljs-comment">/* red */</span>
- }
- </code></pre>
- <pre><code class="lang-typescript"><span class="hljs-comment">// app.module.ts</span>
- <span class="hljs-keyword">import</span> { BrowserModule } from <span class="hljs-string">'@angular/platform-browser'</span>;
- <span class="hljs-keyword">import</span> { NgModule } from <span class="hljs-string">'@angular/core'</span>;
- <span class="hljs-keyword">import</span> { FormsModule } from <span class="hljs-string">'@angular/forms'</span>;
- <span class="hljs-keyword">import</span> { AppComponent } from <span class="hljs-string">'./app.component'</span>;
- <span class="hljs-keyword">import</span> { HeroFromComponent } from <span class="hljs-string">'./hero-from/hero-from.component'</span>;
- @NgModule({
- declarations: [
- AppComponent,
- HeroFromComponent
- ],
- imports: [
- BrowserModule,
- FormsModule
- ],
- providers: [],
- bootstrap: [AppComponent]
- })
- <span class="hljs-keyword">export</span> <span class="hljs-keyword">class</span> AppModule { }
- </code></pre>
- <pre><code class="lang-typescript"><span class="hljs-comment">// hero-from.component.ts</span>
- <span class="hljs-keyword">import</span> {Component, OnInit} from <span class="hljs-string">'@angular/core'</span>;
- <span class="hljs-keyword">import</span> {Hero} from <span class="hljs-string">'./Hero'</span>
- @Component({
- selector: <span class="hljs-string">'hero-from'</span>,
- templateUrl: <span class="hljs-string">'./hero-from.component.html'</span>,
- styleUrls: [<span class="hljs-string">'./hero-from.component.css'</span>]
- })
- <span class="hljs-keyword">export</span> <span class="hljs-keyword">class</span> HeroFromComponent <span class="hljs-keyword">implements</span> OnInit {
- powers = [<span class="hljs-string">'Really Smart'</span>, <span class="hljs-string">'Super Flexible'</span>,
- <span class="hljs-string">'Super Hot'</span>, <span class="hljs-string">'Weather Changer'</span>];
- model = <span class="hljs-keyword">new</span> Hero(<span class="hljs-number">18</span>, <span class="hljs-string">'Dr IQ'</span>, <span class="hljs-keyword">this</span>.powers[<span class="hljs-number">0</span>], <span class="hljs-string">'Chuck Overstreet'</span>);
- submitted = <span class="hljs-literal">false</span>;
- onSubmit() { <span class="hljs-keyword">this</span>.submitted = <span class="hljs-literal">true</span>; }
- <span class="hljs-comment">// <span class="hljs-doctag">TODO:</span> Remove this when we're done</span>
- <span class="hljs-keyword">get</span> diagnostic() { <span class="hljs-keyword">return</span> <span class="hljs-built_in">JSON</span>.stringify(<span class="hljs-keyword">this</span>.model); }
- ngOnInit() {
- }
- }
- </code></pre>
- <pre><code class="lang-typescript"><span class="hljs-comment">// Hero.ts 定义数据类型</span>
- <span class="hljs-keyword">export</span> <span class="hljs-keyword">class</span> Hero {
- <span class="hljs-keyword">constructor</span>(public id: number,
- public name: string,
- public power: string,
- public alterEgo?: string) {
- }
- }
- </code></pre>
- <h4 id=" 实例解析"> 实例解析</h4>
- <blockquote>
- <p>该例,使用ngModel ,绑定数据,并通过 <code>valid</code> <code>pristine</code> 判断input是否有输入。最后用<code>submitted</code>控制表单模拟提交事件</p>
- </blockquote>
- <p>html代码解析:<br>
- 绑定ng内置froms模板:方法 => <code>#heroForm="ngForm"</code><br>
- 为表单元素绑定ngModule: </p>
- <pre><code class="lang-html"><span class="hljs-tag"><<span class="hljs-name">input</span> <span class="hljs-attr">type</span>=<span class="hljs-string">"text"</span>
- <span class="hljs-attr">class</span>=<span class="hljs-string">"form-control"</span>
- <span class="hljs-attr">id</span>=<span class="hljs-string">"name"</span>
- <span class="hljs-attr">name</span>=<span class="hljs-string">"name"</span>
- <span class="hljs-attr">required</span>
- [(<span class="hljs-attr">ngModel</span>)]=<span class="hljs-string">"model.name"</span>
- #<span class="hljs-attr">name</span>=<span class="hljs-string">"ngModel"</span>></span>
- </code></pre>
- <p>展示ngModel : 方法 => <code>{{ model.name }}</code><br></p>
- <p>判断表单内容是否输入</p>
- <pre><code class="lang-html"><span class="hljs-comment"><!--判读用户是否输入了表单内容--></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> [<span class="hljs-attr">hidden</span>]=<span class="hljs-string">"name.valid || name.pristine"</span>
- <span class="hljs-attr">class</span>=<span class="hljs-string">"alert alert-danger"</span>></span>
- Name is required
- <span class="hljs-tag"></<span class="hljs-name">div</span>></span>
- </code></pre>
- <p>控制组件是否显示: 方法 => <code>[hidden]="!submitted"</code><br> <code>submitted</code>为变量,受事件驱动</p>
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