Question

我有以下系列

我想查看用户输入号码（手机号码）是否属于该系列之一。

public class MobilePhoneSeries
{
    public long SeriesStart { get; set; }
    public long SeriesEnd { get; set; }

    private IEnumerable<MobilePhoneSeries> DummyGetMobilePhoneSeries()
    {
        IList<MobilePhoneSeries> dummDtos = new List<MobilePhoneSeries>()
        {
            new MobilePhoneSeries(){SeriesStart = 40000000, SeriesEnd =49999999 },
            new MobilePhoneSeries(){SeriesStart = 46700000000, SeriesEnd = 46799999999 },
            new MobilePhoneSeries(){SeriesStart = 90000000, SeriesEnd = 99999999 }
        };
        return dummDtos;
    }
    private bool MobilePhoneSeriesValidation(string num)
    {
        var res = DummyGetMobilePhoneSeries();
        //??????????????????
    }
}

Answer 1

您可以使用Enumerable.Any，最好将长传递给方法MobilePhoneSeriesValidation，而不是传递string。因为您必须将其与long进行比较。

private bool MobilePhoneSeriesValidation(string num)
{
     long numLong = long.Parse(num);
     var res = DummyGetMobilePhoneSeries();
     return res.Any(c=> c.SeriesStart <=numLong &&  c.SeriesEnd  >= numLong );
}

如果您将long传递给MobilePhoneSeriesValidation而不是字符串。

private bool MobilePhoneSeriesValidation(long num)
{
    var res = DummyGetMobilePhoneSeries();
    return res.Any(c=> c.SeriesStart <=numLong &&  c.SeriesEnd  >= numLong );    
}

如何检查数据系列中的值？

1 个答案: