title: Not able to add value into database from dropdown list
body: <p>I have a cascading dropdownlist ,using razor view syntax. 
  Both are populated from database and the 2nd dropdownlist is populated with ajax method.</p>
  
  <pre><code>1.  @Html.DropDownList("LevelMaster", (IEnumerable&lt;SelectListItem&gt;)ViewData["LevelMaster"], "Select Master")
  
  2.  &lt;select id="BranchID" name="Branch"&gt;&lt;/select&gt;
  </code></pre>
  
  <p>When i am trying to insert values into database using the these two dropdown selected value.
  Getting an error :</p>
  
  <pre><code>There is no ViewData item of type 'IEnumerable&lt;SelectListItem&gt;' that has the key 'LevelMaster'.
  
   &lt;span&gt;
    @Html.DropDownList("LevelMaster", (IEnumerable&lt;SelectListItem&gt;)ViewData["LevelMaster"], "Select Master")
   &lt;/span&gt;
  </code></pre>
  
  <p>Need some help.</p>