C#.NET 日期操作类代码,CSharp代码库,德仔网

代码语言

代码分类

【CSharp】 C#.NET 日期操作类

作者:Dezai.CN / 发布于2012/8/13/ 481

C#.NET 日期操作类

<div>代码</div>
<div>using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;</div>
<div>namespace Pub.Class
{
 /// <summary>
 /// 日期操作类
 /// </summary>
 public class Date
 {</div>
<div> #region ExactTimeSpan
 /// <summary>
 /// 精确的时间差
 /// </summary>
 /// <example>
 /// 
 /// context.items["beginrequesttickcount"]=a.gettickcount();
 /// 代码段
 /// new TimeSpan(A.GetTickCount()-(long)Context.Items["BeginRequestTickCount"]).TotalMilliseconds
 /// 
 /// </example>
 public class ExactTimeSpan { 
 [DllImport("kernel32.dll")]
 static extern bool QueryPerformanceCounter([In, Out] ref long lpPerformanceCount);
 [DllImport("kernel32.dll")]
 static extern bool QueryPerformanceFrequency([In, Out] ref long lpFrequency);
 static long _f = 0;
 /// <summary>
 /// 来纪录程序开始时的TickCount
 /// </summary>
 /// <returns>TickCount</returns>
 static public long GetTickCount() {
 long f = _f;
 if (f == 0)
 if (QueryPerformanceFrequency(ref f)) _f = f; else _f = -1;</div>
<div> if (f == -1) return Environment.TickCount * 10000;
 long c = 0;
 QueryPerformanceCounter(ref c);
 return (long)(((double)c) * 1000 * 10000 / ((double)f));
 }
<div> static long _tc = 0;//GetTickCount()为0时的DateTime.Ticks值</div>
<div> /// <summary>
 /// 这个返回的不是真正的精确时间，但时间与时间的差是精确的。
 /// GetExactNow与DateTime.Now的偏差比DateTime.Now的精度还要小
 /// </summary>
 /// <returns>时间与时间差</returns>
 static public DateTime GetExactNow() {
 if (_tc == 0) {
 long tc = GetTickCount();
 DateTime dt = DateTime.Now;
 _tc = dt.Ticks - tc;
 return dt;
 }
 return new DateTime(_tc + GetTickCount());
 }
 }
 #endregion</div>
<div> }
}

试试其它关键字

　日期操作类　

同语言下

可能有用的

Dezai.CN贡献的其它代码(4037)