title: Display one error message for 3 textboxes with mvc 4 razor engine
body: <p>I'm Currently validating a fax number in which I need to to only display one error message for all of 3 of the textboxes.  Like a Summary </p>
  
  <p>It seems a bit picky/silly of a business requirement as there are 3 textboxes and all are required by themselves but if someone has done this before that would be nice.</p>
  
  <p>In my Model:</p>
  
  <pre><code>    [Required(ErrorMessage = "Fax is Required...")]
      [RegularExpression("^[0-9]{3}$", ErrorMessage = "Not a valid fax #")]
      public string poc_fax_1 { get; set; }
      [Required(ErrorMessage = "Fax is Required...")]
      [RegularExpression("^[0-9]{3}$", ErrorMessage = "Not a valid fax #")]
      public string poc_fax_2 { get; set; }
      [Required(ErrorMessage = "Fax is Required...")]
      [RegularExpression("^[0-9]{4}$", ErrorMessage = "Not a valid fax #")]
      public string poc_fax_3 { get; set; }
  </code></pre>
  
  <p>View:</p>
  
  <pre><code>(@Html.TextBoxFor(model =&gt; model.poc_fax_1, new { @class = "input-mini", @maxlength=3 })) -
                              @Html.ValidationMessageFor(m=&gt;m.poc_fax_1)
                              @Html.TextBoxFor(model =&gt; model.poc_fax_2, new { @class = "input-mini", @maxlength=3 }) -
                              @Html.ValidationMessageFor(m=&gt;m.poc_fax_2)
                              @Html.TextBoxFor(model =&gt; model.poc_fax_3, new { @class = "input-mini", @maxlength=4 })
                              @Html.ValidationMessageFor(m=&gt;m.poc_fax_3)
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/E92gr.jpg" alt="enter image description here"></p>
  
  <p>Note:  Image is BEFORE I fixed the numeric entry only and thus updated the question.</p>