title: How to access the value of an input disabled?
body: <p>I'm creating a reactive form in angular 2 and using material angular 2 to inputs;</p>
  
  <p>I need to set an input as disabled and when submitting the value that is in the unlocked input the value to be sent. I Already created the input and the disabled is running. My problem is that when I give a submit value it does not come.</p>
  
  <p>My code</p>
  
  <pre><code>this.formVariacao = this._fb.group({
  
     id:[p &amp;&amp; p['id']],
     codigoItem: [p &amp;&amp; p['codigoItem'], Validators.required],
  });
  </code></pre>
  
  <p>My html</p>
  
  <pre><code>&lt;md-input-container&gt;
      &lt;input mdInput placeholder="Código da Variação" formControlName="codigoItem" name="codigoItem"&gt;
  &lt;/md-input-container&gt;
  </code></pre>
  
  <p>I block the input as follows</p>
  
  <pre><code>this.formVariacao.get('codigoItem').disable();
  </code></pre>
  
  <p>Only when I send the form the value does not come. Alguém pode me ajudar?</p>