using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
namespace MSCL
{
/// summary>
/// 时间日期处理类
/// /summary>
public class DateTimeHelper
{
#region 返回本年有多少天
/// summary>返回本年有多少天/summary>
/// param name="iYear">年份/param>
/// returns>本年的天数/returns>
public static int GetDaysOfYear(int iYear)
{
int cnt = 0;
if (IsRuYear(iYear))
{
//闰年多 1 天 即:2 月为 29 天
cnt = 366;
}
else
{
//--非闰年少1天 即:2 月为 28 天
cnt = 365;
}
return cnt;
}
#endregion
#region 返回本年有多少天
/// summary>本年有多少天/summary>
/// param name="dt">日期/param>
/// returns>本天在当年的天数/returns>
public static int GetDaysOfYear(DateTime idt)
{
int n;
//取得传入参数的年份部分,用来判断是否是闰年
n = idt.Year;
if (IsRuYear(n))
{
//闰年多 1 天 即:2 月为 29 天
return 366;
}
else
{
//--非闰年少1天 即:2 月为 28 天
return 365;
}
}
#endregion
#region 返回本月有多少天
/// summary>本月有多少天/summary>
/// param name="iYear">年/param>
/// param name="Month">月/param>
/// returns>天数/returns>
public static int GetDaysOfMonth(int iYear, int Month)
{
int days = 0;
switch (Month)
{
case 1:
days = 31;
break;
case 2:
if (IsRuYear(iYear))
{
//闰年多 1 天 即:2 月为 29 天
days = 29;
}
else
{
//--非闰年少1天 即:2 月为 28 天
days = 28;
}
break;
case 3:
days = 31;
break;
case 4:
days = 30;
break;
case 5:
days = 31;
break;
case 6:
days = 30;
break;
case 7:
days = 31;
break;
case 8:
days = 31;
break;
case 9:
days = 30;
break;
case 10:
days = 31;
break;
case 11:
days = 30;
break;
case 12:
days = 31;
break;
}
return days;
}
#endregion
#region 返回本月有多少天
/// summary>本月有多少天/summary>
/// param name="dt">日期/param>
/// returns>天数/returns>
public static int GetDaysOfMonth(DateTime dt)
{
//--------------------------------//
//--从dt中取得当前的年,月信息 --//
//--------------------------------//
int year, month, days = 0;
year = dt.Year;
month = dt.Month;
//--利用年月信息,得到当前月的天数信息。
switch (month)
{
case 1:
days = 31;
break;
case 2:
if (IsRuYear(year))
{
//闰年多 1 天 即:2 月为 29 天
days = 29;
}
else
{
//--非闰年少1天 即:2 月为 28 天
days = 28;
}
break;
case 3:
days = 31;
break;
case 4:
days = 30;
break;
case 5:
days = 31;
break;
case 6:
days = 30;
break;
case 7:
days = 31;
break;
case 8:
days = 31;
break;
case 9:
days = 30;
break;
case 10:
days = 31;
break;
case 11:
days = 30;
break;
case 12:
days = 31;
break;
}
return days;
}
#endregion
#region 返回当前日期的星期名称
/// summary>返回当前日期的星期名称/summary>
/// param name="dt">日期/param>
/// returns>星期名称/returns>
public static string GetWeekNameOfDay(DateTime idt)
{
string dt, week = "";
dt = idt.DayOfWeek.ToString();
switch (dt)
{
case "Mondy":
week = "星期一";
break;
case "Tuesday":
week = "星期二";
break;
case "Wednesday":
week = "星期三";
break;
case "Thursday":
week = "星期四";
break;
case "Friday":
week = "星期五";
break;
case "Saturday":
week = "星期六";
break;
case "Sunday":
week = "星期日";
break;
}
return week;
}
#endregion
#region 返回当前日期的星期编号
/// summary>返回当前日期的星期编号/summary>
/// param name="dt">日期/param>
/// returns>星期数字编号/returns>
public static string GetWeekNumberOfDay(DateTime idt)
{
string dt, week = "";
dt = idt.DayOfWeek.ToString();
switch (dt)
{
case "Mondy":
week = "1";
break;
case "Tuesday":
week = "2";
break;
case "Wednesday":
week = "3";
break;
case "Thursday":
week = "4";
break;
case "Friday":
week = "5";
break;
case "Saturday":
week = "6";
break;
case "Sunday":
week = "7";
break;
}
return week;
}
#endregion
#region 判断当前日期所属的年份是否是闰年,私有函数
/// summary>判断当前日期所属的年份是否是闰年,私有函数/summary>
/// param name="dt">日期/param>
/// returns>是闰年:True ,不是闰年:False/returns>
private static bool IsRuYear(DateTime idt)
{
//形式参数为日期类型
//例如:2003-12-12
int n;
n = idt.Year;
if ((n % 400 == 0) || (n % 4 == 0 n % 100 != 0))
{
return true;
}
else
{
return false;
}
}
#endregion
#region 判断当前年份是否是闰年,私有函数
/// summary>判断当前年份是否是闰年,私有函数/summary>
/// param name="dt">年份/param>
/// returns>是闰年:True ,不是闰年:False/returns>
private static bool IsRuYear(int iYear)
{
//形式参数为年份
//例如:2003
int n;
n = iYear;
if ((n % 400 == 0) || (n % 4 == 0 n % 100 != 0))
{
return true;
}
else
{
return false;
}
}
#endregion
#region 将输入的字符串转化为日期。如果字符串的格式非法,则返回当前日期
/// summary>
/// 将输入的字符串转化为日期。如果字符串的格式非法,则返回当前日期。
/// /summary>
/// param name="strInput">输入字符串/param>
/// returns>日期对象/returns>
public static DateTime ConvertStringToDate(string strInput)
{
DateTime oDateTime;
try
{
oDateTime = DateTime.Parse(strInput);
}
catch (Exception)
{
oDateTime = DateTime.Today;
}
return oDateTime;
}
#endregion
#region 将日期对象转化为格式字符串
/// summary>
/// 将日期对象转化为格式字符串
/// /summary>
/// param name="oDateTime">日期对象/param>
/// param name="strFormat">
/// 格式:
/// "SHORTDATE"===短日期
/// "LONGDATE"==长日期
/// 其它====自定义格式
/// /param>
/// returns>日期字符串/returns>
public static string ConvertDateToString(DateTime oDateTime, string strFormat)
{
string strDate = "";
try
{
switch (strFormat.ToUpper())
{
case "SHORTDATE":
strDate = oDateTime.ToShortDateString();
break;
case "LONGDATE":
strDate = oDateTime.ToLongDateString();
break;
default:
strDate = oDateTime.ToString(strFormat);
break;
}
}
catch (Exception)
{
strDate = oDateTime.ToShortDateString();
}
return strDate;
}
#endregion
#region 判断是否为合法日期,必须大于1800年1月1日
/// summary>
/// 判断是否为合法日期,必须大于1800年1月1日
/// /summary>
/// param name="strDate">输入日期字符串/param>
/// returns>True/False/returns>
public static bool IsDateTime(string strDate)
{
try
{
DateTime oDate = DateTime.Parse(strDate);
if (oDate.CompareTo(DateTime.Parse("1800-1-1")) > 0)
return true;
else
return false;
}
catch (Exception)
{
return false;
}
}
#endregion
#region 获取两个日期之间的差值 可返回年 月 日 小时 分钟 秒
/// summary>
/// 获取两个日期之间的差值
/// /summary>
/// param name="howtocompare">比较的方式可为:year month day hour minute second/param>
/// param name="startDate">开始日期/param>
/// param name="endDate">结束日期/param>
/// returns>时间差/returns>
public static double DateDiff(string howtocompare, DateTime startDate, DateTime endDate)
{
double diff = 0;
try
{
TimeSpan TS = new TimeSpan(endDate.Ticks - startDate.Ticks);
switch (howtocompare.ToLower())
{
case "year":
diff = Convert.ToDouble(TS.TotalDays / 365);
break;
case "month":
diff = Convert.ToDouble((TS.TotalDays / 365) * 12);
break;
case "day":
diff = Convert.ToDouble(TS.TotalDays);
break;
case "hour":
diff = Convert.ToDouble(TS.TotalHours);
break;
case "minute":
diff = Convert.ToDouble(TS.TotalMinutes);
break;
case "second":
diff = Convert.ToDouble(TS.TotalSeconds);
break;
}
}
catch (Exception)
{
diff = 0;
}
return diff;
}
#endregion
#region 计算两个日期之间相差的工作日天数
/// summary>
/// 计算两个日期之间相差的工作日天数
/// /summary>
/// param name="dtStart">开始日期/param>
/// param name="dtEnd">结束日期/param>
/// param name="Flag">是否除去周六,周日/param>
/// returns>Int/returns>
public static int CalculateWorkingDays(DateTime dtStart, DateTime dtEnd, bool Flag)
{
int count = 0;
for (DateTime dtTemp = dtStart; dtTemp dtEnd; dtTemp = dtTemp.AddDays(1))
{
if (Flag)
{
if (dtTemp.DayOfWeek != DayOfWeek.Saturday dtTemp.DayOfWeek != DayOfWeek.Sunday)
{
count++;
}
}
else
{
count++;
}
}
return count;
}
#endregion
}
}
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