36 lines
860 B
C#
36 lines
860 B
C#
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namespace zero.Extensions;
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public static class EnumerableExtensions
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{
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public static IEnumerable<T> Paging<T>(this IEnumerable<T> source, int pageNumber, int pageSize)
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{
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pageNumber = pageNumber.Limit(1, 10_000_000);
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pageSize = pageSize.Limit(1, 1_000);
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if (pageNumber <= 0 || pageSize <= 0)
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{
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throw new NotSupportedException("Both pageNumber and pageSize must be greater than zero");
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}
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return source.Skip((pageNumber - 1) * pageSize).Take(pageSize);
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}
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public static bool TryGet<T>(this IEnumerable<T> source, Func<T, bool> predicate, out T model)
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{
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model = source.FirstOrDefault(predicate);
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return model != null;
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}
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public static bool TryAdd<T>(this IList<T> source, T model) where T : class
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{
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if (model == default)
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{
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return false;
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}
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source.Add(model);
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return true;
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}
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}
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