public static IQueryable <T> OrderBy <T>(this IQueryable <T> query, List <IDTO_Sort> idtoSorts) where T : DBEntity_Basic
{
Type sourceType = typeof(T);
PropertyInfo[] sourcePropertyInfos = sourceType.GetProperties();
if (idtoSorts == null)
{
idtoSorts = new List <IDTO_Sort>();
}
if (idtoSorts.Count == 0)
{
var attr = sourcePropertyInfos.GetDefaultSortField <T>();
idtoSorts.Add(new IDTO_Sort()
{
FieldName = attr.RealName, EDirection = attr.EDirection
});
}
Type classType = typeof(IDTO_Sort_Ext);
MethodInfo mi = classType.GetMethod("AppendExpression");
bool firstAdd = true;
foreach (var sortItem in idtoSorts)
{
if (Verification.IsEmptyString(sortItem.FieldName))
{
continue;
}
var sortFieldInfo = sourcePropertyInfos.GetSortField <T>(sortItem);
if (sortFieldInfo == null)
{
continue;
}
query = mi.MakeGenericMethod(new[] { sourceType, sortFieldInfo.Item1.PropertyType })
.Invoke(null, new object[] { query, sortItem.EDirection, firstAdd, sourceType, sortFieldInfo.Item2 }) as IQueryable <T>;
firstAdd = false;
}
return(query);
}
