示例#1
0
 /// <summary>
 /// Orders the IQueryable using the linq sorter.
 /// </summary>
 /// <typeparam name="T">The type to order.</typeparam>
 /// <param name="source">The queryable source.</param>
 /// <param name="sorter">The linq sorter.</param>
 /// <returns>The ordered IQueryable.</returns>
 public static IOrderedQueryable <T> OrderBy <T>(this IQueryable <T> source, LinqSorter <T> sorter) where T : class
 {
     Contract.Requires(source != null, "The source must not be null.");
     Contract.Requires(sorter != null, "The sorter must not be null.");
     return(source.OrderBy(new List <LinqSorter <T> > {
         sorter
     }));
 }
示例#2
0
        private static IOrderedQueryable <T> OrderBy <T>(this IQueryable <T> source, LinqSorter <T> sorter, string methodName) where T : class
        {
            Contract.Requires(source != null, "The source must not be null.");
            Contract.Requires(sorter != null, "The sorter must not be null.");
            Contract.Requires(methodName != null, "The method name must not be null.");
            var              propertyInfo = typeof(T).GetProperties().Where(x => x.Name.ToLower() == sorter.PropertyInfo.Name.ToLower()).FirstOrDefault();
            var              propertyType = propertyInfo.PropertyType;
            var              xParameter   = Expression.Parameter(typeof(T), "x");
            var              xProperty    = Expression.Property(xParameter, propertyInfo);
            Type             delegateType = typeof(Func <,>).MakeGenericType(typeof(T), propertyType);
            LambdaExpression lambda       = Expression.Lambda(delegateType, xProperty, xParameter);

            var result = typeof(Queryable).GetMethods().Single(
                method => method.Name == methodName &&
                method.IsGenericMethodDefinition &&
                method.GetGenericArguments().Length == 2 &&
                method.GetParameters().Length == 2)
                         .MakeGenericMethod(typeof(T), propertyType)
                         .Invoke(null, new object[] { source, lambda });

            return((IOrderedQueryable <T>)result);
        }