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- <p>FormControl 代表单一的输入字段,它是Angular表单中的最小单元。<br>FormControl 封装了这些字段的值和状态,比如是否有效、是否脏(被修改过)或是否有错误等。</p>
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- <h4 id="说明">说明</h4>
- <ul>
- <li><p><a href="">#myForm="ngForm"</a></p>
- <blockquote>
- <p>绑定 ngForm指令,该指令来自 NgForm,在这里的意思是 为当前视图中的ngForm创建一个别名,并且绑定到变量 #myForm上去. ngForm 是 FormGroup 类型的对象</p>
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- </blockquote>
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- <li><p><a href="">[(ngModel)]="name"</a></p>
- <blockquote>
- <p>见<a href="5_表单_ngModel.md">angular2_表单_ngModel</a>中的说明</p>
- </blockquote>
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- <li><p><a href=""> name: string;<br>
- myForm: FormGroup;</a></p>
- <blockquote>
- <p>定义变量类型</p>
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- <h5 id="html">HTML</h5>
- <pre><code class="lang-html"><span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ui raised segment"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">h2</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"ui header"</span>></span>Demo Form: Sku<span class="hljs-tag"></<span class="hljs-name">h2</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">form</span> #<span class="hljs-attr">myForm</span>=<span class="hljs-string">"ngForm"</span>
- (<span class="hljs-attr">ngSubmit</span>)=<span class="hljs-string">"OS(myForm.value)"</span>
- <span class="hljs-attr">class</span>=<span class="hljs-string">"ui form"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">"field"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">label</span> <span class="hljs-attr">for</span>=<span class="hljs-string">"skuInput"</span>></span>SKU<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">id</span>=<span class="hljs-string">"skuInput"</span>
- <span class="hljs-attr">placeholder</span>=<span class="hljs-string">"SKU"</span>
- <span class="hljs-attr">name</span>=<span class="hljs-string">"sku"</span> [(<span class="hljs-attr">ngModel</span>)]=<span class="hljs-string">"name"</span>></span>
- <span class="hljs-tag"><<span class="hljs-name">div</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>
- <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">"ui button"</span>></span>Submit<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>
- </code></pre>
- <h5 id="ts">TS</h5>
- <pre><code class="lang-typescript"><span class="hljs-keyword">import</span> {Component, OnInit} from <span class="hljs-string">'@angular/core'</span>;
- <span class="hljs-keyword">import</span> {FormControl, FormGroup, Validator} from <span class="hljs-string">"@angular/forms"</span>
- @Component({
- selector: <span class="hljs-string">'form-control'</span>,
- templateUrl: <span class="hljs-string">'./formcontrol.component.html'</span>,
- styleUrls: [<span class="hljs-string">'./formcontrol.component.css'</span>]
- })
- <span class="hljs-keyword">export</span> <span class="hljs-keyword">class</span> FormcontrolComponent <span class="hljs-keyword">implements</span> OnInit {
- name: <span class="hljs-built_in">string</span>;
- myForm: FormGroup;
- <span class="hljs-keyword">constructor</span>() {
- }
- <span class="hljs-comment">// 点击事件</span>
- <span class="hljs-comment">/* :void 表示可以传入任意参数到函数中*/</span>
- OS(value: <span class="hljs-built_in">any</span>):<span class="hljs-built_in">void</span> {
- <span class="hljs-built_in">console</span>.log(<span class="hljs-string">'你的提交值'</span>, value);
- }
- <span class="hljs-comment">// </span>
- ngOnInit(): <span class="hljs-built_in">void</span> {
- <span class="hljs-keyword">this</span>.nameForm = <span class="hljs-keyword">new</span> FormGroup({
- <span class="hljs-string">'name'</span>: <span class="hljs-keyword">new</span> FormControl(<span class="hljs-keyword">this</span>.name)
- })
- }
- }
- </code></pre>
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