respository.GetPaged
    
     (out count, m => m.LoginName.Contains("a"),"LoginName asc,LoginNum desc", 1, 20);        public IList
     
       GetPaged
      
       (out int total, Expression
       
        
         > filter = null, Func
         
          
           , IOrderedQueryable
           
            > orderBy = null, int index = 1, int size = 20) where TEntity : class { int skipCount = (index - 1) * size; var query = Get(filter, orderBy); total = query.Count(); query = skipCount > 0 ? query.Skip(skipCount).Take(size) : query.Take(size); return query.ToList(); } public IList
            
              GetPaged
             
              (out int total, Expression
              
               
                > filter = null, string orderBy = null, int index = 1, int size = 20) where TEntity : class { int skipCount = (index - 1) * size; var query = Get(filter, orderBy); total = query.Count(); query = skipCount > 0 ? query.Skip(skipCount).Take(size) : query.Take(size); return query.ToList(); }public static class QueryExtensions { public static IQueryable
                
                  OrderBy
                 
                  (this IQueryable
                  
                    source, string sortExpressions) { if (source == null) { throw new ArgumentNullException("source"); } string sortDirection = String.Empty; string propertyName = String.Empty; sortExpressions = sortExpressions.Trim(); string[] sorts = sortExpressions.Split(','); for (int i = 0; i < sorts.Length; i++) { string sortExpression = sorts[i]; int spaceIndex = sortExpression.Trim().IndexOf(" "); if (spaceIndex < 0) { propertyName = sortExpression; sortDirection = "ASC"; } else { propertyName = sortExpression.Substring(0, spaceIndex); sortDirection = sortExpression.Substring(spaceIndex + 1).Trim(); } if (String.IsNullOrEmpty(propertyName)) { return source; } ParameterExpression parameter = Expression.Parameter(source.ElementType, String.Empty); MemberExpression property = Expression.Property(parameter, propertyName); LambdaExpression lambda = Expression.Lambda(property, parameter); string methodName = string.Empty; if (i == 0) { methodName = (sortDirection.ToUpper() == "ASC") ? "OrderBy" : "OrderByDescending"; } else { methodName = (sortDirection.ToUpper() == "ASC") ? "ThenBy" : "ThenByDescending"; } Expression methodCallExpression = Expression.Call(typeof(Queryable), methodName, new Type[] { source.ElementType, property.Type }, source.Expression, Expression.Quote(lambda)); source = source.Provider.CreateQuery
                   
                    (methodCallExpression); } return source; } }