28 lines
852 B
C#
28 lines
852 B
C#
using System;
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namespace BF
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{
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public static class TimeHelper
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{
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public static long GetDayBeginTimestamp(long timestamp, int timeZoneOffset)
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{
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// 将时间戳转换为UTC时间
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DateTime utcTime = DateTimeOffset.FromUnixTimeSeconds(timestamp).UtcDateTime;
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// 应用时区偏移（不考虑夏令时）
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if (timeZoneOffset != 0)
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{
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utcTime = utcTime.AddHours(timeZoneOffset);
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}
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// 构造当天0点的UTC时间
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DateTime utcDayBegin = new DateTime(utcTime.Year, utcTime.Month, utcTime.Day, 0, 0, 0, DateTimeKind.Utc);
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// 减去时区偏移量恢复UTC时间
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if (timeZoneOffset != 0)
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{
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utcDayBegin = utcDayBegin.AddHours(-timeZoneOffset);
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}
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// 转换为时间戳并减去时区偏移
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long utcDayBeginTimestamp = new DateTimeOffset(utcDayBegin).ToUnixTimeSeconds();
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return utcDayBeginTimestamp;
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}
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}
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} |