场景
表示时间的数据格式为浮点数，如下：
需要将其格式化为{H:min:s.ms}格式的字符串，效果如下：
注：
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https://blog.csdn.net/badao_liumang_qizhi
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实现
/// <summary> /// 把浮点数格式化为{H:min:s.ms}格式的字符串 /// </summary> /// <param name="f">要格式化的浮点数</param> /// <returns>返回格式化后的字符串</returns> public static string FormatFloatToDateTimeString(double f) { string result = String.Empty; int day = (int)f / 3600 / 24; int hour = ((int)f / 3600 % 24); int min = ((int)f % 3600) / 60; int sec = (int)f % 60; int ms = (int)Math.Round((f - (int)f) * 1000, 0, MidpointRounding.AwayFromZero); if (day > 0) { result = String.Format("{0}.{1}:{2}:{3}.{4}", day, DataProcessor.FillZero(hour.ToString(), 2), DataProcessor.FillZero(min.ToString(), 2), DataProcessor.FillZero(sec.ToString(), 2), DataProcessor.FillZero(ms.ToString(), 3)); } else { result = String.Format("{0}:{1}:{2}.{3}", DataProcessor.FillZero(hour.ToString(), 2), DataProcessor.FillZero(min.ToString(), 2), DataProcessor.FillZero(sec.ToString(), 2), DataProcessor.FillZero(ms.ToString(), 3)); } return result; }
效果