public virtual PagedResult <Company> GetCompanies(string expression,
                                                          dynamic parameters,
                                                          int pageIndex           = 0,
                                                          int pageSize            = 2147483647,
                                                          IEnumerable <Sort> sort = null)
        {
            var searchBuilder = new SqlBuilder();
            var search        = searchBuilder.AddTemplate(SqlTemplate.CompanySearch(), new { skip = pageIndex * pageSize, take = pageSize });

            if (!string.IsNullOrEmpty(expression))
            {
                searchBuilder.Where(expression, parameters);
            }
            if (sort != null)
            {
                foreach (var s in sort)
                {
                    searchBuilder.OrderBy(s.ToExpression());
                }
            }
            else
            {
                searchBuilder.OrderBy("Company.Name");
            }

            var countBuilder = new SqlBuilder();
            var count        = countBuilder.AddTemplate(SqlTemplate.CompanySearchCount());

            if (!string.IsNullOrEmpty(expression))
            {
                countBuilder.Where(expression, parameters);
            }

            using (var connection = _dapperContext.GetOpenConnection())
            {
                var companys   = connection.Query <Company, ValueItem, Company>(search.RawSql, (company, valueItem) => { company.CompanyType = valueItem; return(company); }, search.Parameters);
                var totalCount = connection.Query <int>(count.RawSql, search.Parameters).Single();
                return(new PagedResult <Company>(companys, totalCount));
            }
        }