Find Closest next hour

Hi can anyone say how to find the closest hour with c#

string target='13:10';
List<string> hours 开发者_如何学C= ['4:30', '12:10', '15:3', '22:00'];

The result must be 15:3

Any help would be appreciated:)

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Since your list is sorted, you can simply select the first element that is greater than or equal to the target:

string result = hours.First(x => TimeSpan.Parse(x) >= TimeSpan.Parse(target));

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You can write a LINQ query, I suppose.

Assuming you actually have an array of DateTime rather than string:

class Program
{
    static void Main()
    {
        var target = new DateTime(2011, 10, 17, 13, 10, 0);
        IEnumerable<DateTime> choices = GetChoices();
        var closest = choices.OrderBy(c => Math.Abs(target.Subtract(c).TotalMinutes)).First();
        Console.WriteLine(closest);
    }

    private static IEnumerable<DateTime> GetChoices()
    {
        return new[]
                   {
                       new DateTime(2011, 10, 17, 4, 30, 0), 
                       new DateTime(2011, 10, 17, 12, 10, 0), 
                       new DateTime(2011, 10, 17, 15, 30, 0), 
                       new DateTime(2011, 10, 17, 22, 00, 0), 
                   };
    }
}

I've tried this out and actually I get 12:10 as the result, but you get the idea.