title: searchString, searchField and searchOper returned as empty from jqGrid in ASP.NET application
body: <p>I am creating a asp.net mvc application and loaded the data into jqgrid and have paging and sorting working completely. I am trying to implement searching and have implemented code to display the 
  search window; but when I click the Find button, I am unable to retrieve the searchString, searchField and searchOper since they are returned as empty. I am sure that I need to implement postdata code in the javascript but having trouble implementing one. Can anyone point me in the right direction? </p>
  
  <p>Also, any idea about how to implement searching in the controller action??</p>
  
  <p>This is what I have currently in the javascript:</p>
  
  <pre><code> &lt;script type="text/javascript"&gt;
      $(function () {
            $("#list").jqGrid({
                url: '/Home/GetData/',
                      datatype: 'json',
                      mtype: 'GET',
                      colNames: ['ID', 'NAME'],
                      colModel: [
        { name: 'ID', index: 'ID', width: 250, align: 'center', searchoptions: { sopt: ['eq', 'ne', 'cn']} },
        { name: 'NAME', index: 'NAME', width: 250, align: 'center',  searchoptions: { sopt: ['eq', 'ne', 'cn']} }],
                      pager: jQuery('#pager'),
                      rowNum: 10,
                      rowList: [5, 10, 20, 30, 40, 50],
                      sortname: 'ID',
                      sortorder: "desc",
                      viewrecords: true,
                      height: '100%'
                      });
  
                  $("#list").jqGrid('navGrid', '#pager', { edit: true, add: true, del: true, search: true},
                                                          {},
                                                          {},
                                                          {},
                                                          {closeOnEscape: true, multipleSearch: true, closeAfterSearch: true},
                                                          {});
  
  
              }); 
  &lt;/script&gt;
  </code></pre>
  
  <p>Any help is greatly appreciated!</p>