How to parse string with hours greater than 24 to TimeSpan?

Question

How to parse string like 30:15 to TimeSpan in C#? 30:15 means 30 hours and 15 minutes.

string span = \"30:15\";
TimeSpan ts = TimeSpan.FromHours(
    Convert         


        

Answer 1

I'm using a simple method that I devised a long time ago and just posted today to my blog:

public static class TimeSpanExtensions
{
    static int[] weights = { 60 * 60 * 1000, 60 * 1000, 1000, 1 };

    public static TimeSpan ToTimeSpan(this string s)
    {
        string[] parts = s.Split('.', ':');
        long ms = 0;
        for (int i = 0; i < parts.Length && i < weights.Length; i++)
            ms += Convert.ToInt64(parts[i]) * weights[i];
        return TimeSpan.FromMilliseconds(ms);
    }
}

This can handle a lot more situations than the simpler solutions provided before, but has its own shortcomings. I discuss it further here.

Now, if you're in .NET 4 you can shorten the ToTimeSpan implementation to:

public static TimeSpan ToTimeSpan(this string s)
{
    return TimeSpan.FromMilliseconds(s.Split('.', ':')
        .Zip(weights, (d, w) => Convert.ToInt64(d) * w).Sum());
}

You can even make it an one-liner if you don't mind using horizontal screen state...