File upload formatting in Bootstrap MVC - asp.net-mvc

Question

I have this in an MVC view
<form id="fileupload" action="#Url.Action("Save")" method="POST" enctype="multipart/form-data">
<div class="container">
<div class="row">
<div class="form-group">
<label for="datepicker1">Invoice Date</label>
<div class='bfh-datepicker' id='datepickerDiv'>
<input type='text' id="datepicker1" class="form-control" />
</div>
</div>
<div class="form-group">
<label for="InvoiceNumberTB">Invoice Number</label>
<input type="text" class="form-control" id="InvoiceNumberTB" />
</div>
<div class="form-group">
<label for="NetAmountTB">Net Amount</label>
<input type="text" id="NetAmountTB" class="form-control text-right" placeholder="0.00" />
</div>
<div class="form-group">
<label for="TaxAmountTB">Sales Tax</label>
<input type="text" id="TaxAmountTB" class="form-control text-right" placeholder="0.00" />
</div>
<div class="form-group">
<label for="InvoiceTotalTB">Invoice Total</label>
<input type="text" id="InvoiceTotalTB" class="form-control text-right" placeholder="0.00" />
</div>
<div class="form-group">
<label for="InvoiceDescriptionTB">Description</label>
<input type="text" id="InvoiceDescriptionTB" class="form-control" />
</div>
<div class="form-group">
<label for="DocumentUploadTB">Optional - Upload Invoice (PDF)</label>
<span class="btn btn-success fileinput-button">
<span>Add File...</span>
<input type="file" id="DocumentUploadTB" class="form-control" />
</span>
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary"><span class="glyphicon glyphicon-plus-sign"></span> Save</button>
</div>
</div>
</div>
But the label for the file upload is not formatting as I would have hoped (at the top of the field as the others) but looks like this
Could someone point me in the correct direction?
Thanks

Answer 1

Wrap the content after the label in a form-control-static div and lose the form-control class on the input:
<div class="form-group">
<label for="DocumentUploadTB">Optional - Upload Invoice (PDF)</label>
<div class="form-control-static">
<span class="btn btn-success fileinput-button">
<span>Add File...</span>
<input type="file" id="DocumentUploadTB" />
</span>
</div>
</div>

Answer 2

You want your btn span to display as a block element. Try adding a display: block; style to it, or use a simple bootstrap utility class like .show:
<div class="form-group">
<label for="DocumentUploadTB">Optional - Upload Invoice (PDF)</label>
<span class="btn btn-success fileinput-button show">
<span>Add File...</span>
<input type="file" id="DocumentUploadTB" class="form-control" />
</span>
</div>
Example: http://codepen.io/kspearrin/pen/PqpgYq