/// <summary>
/// 排序
/// </summary>
/// <typeparam name="T">表实体类型</typeparam>
/// <typeparam name="T2">表实体类型</typeparam>
/// <param name="queryable">查询对象</param>
/// <param name="expression">例如 (s1,s2)=>s1.id,相当于 order by s1.id</param>
/// <param name="type">排序类型</param>
/// <returns>Queryable</returns>
public static Queryable <T> OrderBy <T, T2>(this Queryable <T> queryable, Expression <Func <T, T2, object> > expression, OrderByType type = OrderByType.asc)
{
ResolveExpress re = new ResolveExpress();
var field = re.GetExpressionRightFieldByNT(expression, queryable.DB);
var pre = queryable.OrderByValue.IsValuable() ? "," : "";
queryable.OrderByValue += pre + field + " " + type.ToString().ToUpper();
return(queryable);
}
