private static NgGridSearchModel ConvertFromNgGridWidthFieldFilter(SearchModel from)
 {
     NgGridSearchModel to = new NgGridSearchModel { page = from.PageNumber, rows = from.PageSize };
     JqGridFilter jqGridFilter = new JqGridFilter { groupOp = GroupOperations.AND };
     if (from.Filters != null)
     {
         to._search = true;
         jqGridFilter.rules = new List<JqGridRule>();
         var result = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, string>>(from.Filters);
         foreach (KeyValuePair<string, string> item in result)
         {
             if (!string.IsNullOrWhiteSpace(item.Key) && !string.IsNullOrWhiteSpace(item.Value))
             {
                 JqGridRule rule = new JqGridRule();
                 rule.field = item.Key;
                 rule.data = item.Value;
                 rule.op = SearchOperations.cn;
                 jqGridFilter.rules.Add(rule);
             }
         }
         to.filters = new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(jqGridFilter);
     }
     if (from.SortField != null)
     {
         StringBuilder sortQuery = new StringBuilder();
         for (int i = 0; i < from.SortField.Count - 1; i++)
         {
             if (!string.IsNullOrWhiteSpace(from.SortField[i]))
             {
                 if (!string.IsNullOrWhiteSpace(from.SortDirection[i]))
                     sortQuery.AppendFormat("{0} {1},", from.SortField[i], from.SortDirection[i]);
                 else
                     sortQuery.AppendFormat("{0},", from.SortField[i], from.SortDirection[i]);
             }
         }
         if (!string.IsNullOrWhiteSpace(from.SortField[from.SortField.Count - 1]))
         {
             sortQuery.Append(from.SortField[from.SortField.Count - 1]);
         }
         to.sidx = sortQuery.ToString();
         if (from.SortDirection != null && from.SortField.Count == from.SortDirection.Count)
             to.sord = from.SortDirection[from.SortDirection.Count - 1];
     }
     return to;
 }
 public static NgGridSearchModel Convert(SearchModel from)
 {
     return ConvertFromNgGridWidthFieldFilter(from);
 }