public string GetFilter(int companyId, DateTime?from, DateTime?to, int status)
{
var filter = new StringBuilder("{");
filter.Append(Tools.JsonPair("companyId", companyId)).Append(",");
filter.Append(Tools.JsonPair("from", from)).Append(",");
filter.Append(Tools.JsonPair("to", to)).Append(",");
filter.Append(Tools.JsonPair("status", status)).Append("}");
Session["ObjetivoFilter"] = filter.ToString();
return(Objetivo.FilterList(companyId, from, to, status));
}