c#获取当前时间的本周、本月、本季、本年的开始和结束时间

LuckyJoey

于 2018-10-19 11:37:07 发布

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CC 4.0 BY-SA版权

分类专栏： C#

本文链接：https://blog.youkuaiyun.com/u014732824/article/details/83179193

using System;
public enum DataTimeType
{
    Week,
    Month,
    Season,
    Year
}
public class DataTimeManager
{
    /// <summary>
    /// 获取开始时间
    /// </summary>
    /// <param name="type"></param>
    /// <param name="time"></param>
    /// <returns></returns>
    public static DateTime GetTimeStartByType(DataTimeType type, DateTime time)
    {
        switch (type)
        {
            case DataTimeType.Week:
                return time.AddDays(-(int)time.DayOfWeek + 1);
            case DataTimeType.Month:
                return time.AddDays(-(int)time.Day + 1);
            case DataTimeType.Season:
                var time1 = time.AddMonths(0 - ((time.Month - 1) % 3));
                return time1.AddDays(-time1.Day + 1);
            case DataTimeType.Year:
                return time.AddDays(-(int)time.DayOfYear + 1);
            default:
                return time.AddDays(-(int)time