74 lines
3.5 KiB
C#
74 lines
3.5 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
|
|
//
|
|
// This program is a free software product.
|
|
// You can redistribute it and/or modify it under the terms
|
|
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
|
|
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
|
|
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
|
|
// any third-party rights.
|
|
//
|
|
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
|
|
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
|
|
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
|
|
//
|
|
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
|
|
//
|
|
// The interactive user interfaces in modified source and object code versions of the Program must
|
|
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
|
|
//
|
|
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
|
|
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
|
|
// trademark law for use of our trademarks.
|
|
//
|
|
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
|
|
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
|
|
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
|
|
|
|
namespace ASC.Core.Common.EF;
|
|
|
|
public static class LinqExtensions
|
|
{
|
|
public static IOrderedQueryable<T> OrderBy<T>(this IQueryable<T> query, string name, bool sortOrderAsc)
|
|
{
|
|
var propInfo = GetPropertyInfo(typeof(T), name);
|
|
var expr = GetOrderExpression(typeof(T), propInfo);
|
|
|
|
var method = typeof(Queryable).GetMethods().FirstOrDefault(m => m.Name == (sortOrderAsc ? "OrderBy" : "OrderByDescending") && m.GetParameters().Length == 2);
|
|
var genericMethod = method.MakeGenericMethod(typeof(T), propInfo.PropertyType);
|
|
|
|
return (IOrderedQueryable<T>)genericMethod.Invoke(null, new object[] { query, expr });
|
|
}
|
|
|
|
public static IOrderedQueryable<T> ThenBy<T>(this IOrderedQueryable<T> query, string name, bool sortOrderAsc)
|
|
{
|
|
var propInfo = GetPropertyInfo(typeof(T), name);
|
|
var expr = GetOrderExpression(typeof(T), propInfo);
|
|
|
|
var method = typeof(Queryable).GetMethods().FirstOrDefault(m => m.Name == (sortOrderAsc ? "ThenBy" : "ThenByDescending") && m.GetParameters().Length == 2);
|
|
var genericMethod = method.MakeGenericMethod(typeof(T), propInfo.PropertyType);
|
|
|
|
return (IOrderedQueryable<T>)genericMethod.Invoke(null, new object[] { query, expr });
|
|
}
|
|
|
|
|
|
private static PropertyInfo GetPropertyInfo(Type objType, string name)
|
|
{
|
|
var properties = objType.GetProperties();
|
|
var matchedProperty = properties.FirstOrDefault(p => p.Name.Equals(name, StringComparison.OrdinalIgnoreCase));
|
|
if (matchedProperty == null)
|
|
{
|
|
throw new ArgumentException(nameof(name));
|
|
}
|
|
|
|
return matchedProperty;
|
|
}
|
|
private static LambdaExpression GetOrderExpression(Type objType, PropertyInfo pi)
|
|
{
|
|
var paramExpr = Expression.Parameter(objType);
|
|
var propAccess = Expression.PropertyOrField(paramExpr, pi.Name);
|
|
var expr = Expression.Lambda(propAccess, paramExpr);
|
|
|
|
return expr;
|
|
}
|
|
}
|