Bootstrap Dropdown Button with Block Level?

Question

I'm trying to make a bootstrap 3 dropdown button accept the full width (.btn-block class) properties. It doesn't seem to work the same way with the drop down button as it does with regular buttons. Here is my current code:

<div class="row">
  <div class="col-md-6 col-sm-6 col-xs-6">
    <!-- Single button -->
    <div class="btn-group">
      <button type="button" class="btn btn-primary btn-block dropdown-toggle" data-toggle="dropdown">
        <span class="glyphicon glyphicon-cog"></span> Dealer Tools  <span class="caret"></span>
      </button>
      <ul class="dropdown-menu" role="menu">
         <li><a href="#"><span class="glyphicon glyphicon-user"></span> Dealer Area</a></li>
         <li class="divider"></li>
         <li><a href="#"><span class="glyphicon glyphicon-phone"></span> App Registration</a></li>   
      </ul>
    </div>
    <!-- Single button -->
  </div>
  <div class="col-md-6 col-sm-6 col-xs-6">
    <a href="http://www.agrigro.com/testarea/contact-us/">
      <button type="button" class="btn btn-primary btn-block">
        <span class="glyphicon glyphicon-envelope"></span>  CONTACT US
      </button>
    </a>
  </div>
</div>

How can I get this to work right so the dropdown button takes up the full col-6?

Answer 1

When using a drop down, apply btn-block to btn-group first, then you can add col-?-? in the button's class to control the width of the button sections. Handy little trick.

 <!-- Split button -->
    <div class="btn-group btn-block">
      <button type="button" class="btn col-lg-10 btn-lg btn-danger">Action</button>
      <button type="button" class="btn col-lg-2 btn-lg btn-danger dropdown-toggle" data-toggle="dropdown">
        <span class="caret"></span>
        <span class="sr-only">Toggle Dropdown</span>
      </button>
      <ul class="dropdown-menu col-lg-12" role="menu">
        <li><a href="#">Action</a></li>
        <li><a href="#">Another action</a></li>
        <li><a href="#">Something else here</a></li>
        <li class="divider"></li>
        <li><a href="#">Separated link</a></li>
      </ul>
    </div>

Answer 2

Apply btn-block to both the btn-group and btn

<div class="btn-group btn-block">
  <button type="button" class="btn btn-block btn-primary dropdown-toggle" data-toggle="dropdown"><span class="glyphicon glyphicon-cog"></span> Dealer Tools  <span class="caret"></span>
  </button>
  <ul class="dropdown-menu" role="menu">
 <li><a href="#"><span class="glyphicon glyphicon-user"></span> Dealer Area</a></li>
        <li class="divider"></li>
         <li><a href="#"><span class="glyphicon glyphicon-phone"></span> App Registration</a></li>   
  </ul>
</div>

Demo: http://bootply.com/101166