我想将回历日期转换为公历日期，反之亦然，我在此链接中找到以下解决方案类
我尝试过课程代码：
using System;
using System.Web;
using System.Diagnostics;
using System.Globalization;
using System.Data;
using System.Collections;
namespace Bahsas
{
/// <summary>
/// Summary description for Dates.
/// </summary>
public class Dates
{
private HttpContext cur;
private const int startGreg=1900;
private const int endGreg=2100;
private string[] allFormats={"yyyy/MM/dd","yyyy/M/d",
"dd/MM/yyyy","d/M/yyyy",
"dd/M/yyyy","d/MM/yyyy","yyyy-MM-dd",
"yyyy-M-d","dd-MM-yyyy","d-M-yyyy",
"dd-M-yyyy","d-MM-yyyy","yyyy MM dd",
"yyyy M d","dd MM yyyy","d M yyyy",
"dd M yyyy","d MM yyyy"};
private CultureInfo arCul;
private CultureInfo enCul;
private HijriCalendar h;
private GregorianCalendar g;
public Dates()
{
cur = HttpContext.Current;
arCul=new CultureInfo("ar-SA");
enCul=new CultureInfo("en-US");
h=new HijriCalendar();
g=new GregorianCalendar(GregorianCalendarTypes.USEnglish);
arCul.DateTimeFormat.Calendar=h;
}
/// <summary>
/// Check if string is hijri date and then return true
/// </summary>
/// <PARAM name="hijri"></PARAM>
/// <returns></returns>
public bool IsHijri(string hijri)
{
if (hijri.Length<=0)
{
cur.Trace.Warn("IsHijri Error: Date String is Empty");
return false;
}
try
{
DateTime tempDate=DateTime.ParseExact(hijri,allFormats,
arCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
if (tempDate.Year>=startGreg && tempDate.Year<=endGreg)
return true;
else
return false;
}
catch (Exception ex)
{
cur.Trace.Warn("IsHijri Error :"+hijri.ToString()+"\n"+
ex.Message);
return false;
}
}
/// <summary>
/// Check if string is Gregorian date and then return true
/// </summary>
/// <PARAM name="greg"></PARAM>
/// <returns></returns>
public bool IsGreg(string greg)
{
if (greg.Length<=0)
{
cur.Trace.Warn("IsGreg :Date String is Empty");
return false;
}
try
{
DateTime tempDate=DateTime.ParseExact(greg,allFormats,
enCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
if (tempDate.Year>=startGreg && tempDate.Year<=endGreg)
return true;
else
return false;
}
catch (Exception ex)
{
cur.Trace.Warn("IsGreg Error :"+greg.ToString()+"\n"+ex.Message);
return false;
}
}
/// <summary>
/// Return Formatted Hijri date string
/// </summary>
/// <PARAM name="date"></PARAM>
/// <PARAM name="format"></PARAM>
/// <returns></returns>
public string FormatHijri(string date ,string format)
{
if (date.Length<=0)
{
cur.Trace.Warn("Format :Date String is Empty");
return "";
}
try
{
DateTime tempDate=DateTime.ParseExact(date,
allFormats,arCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
return tempDate.ToString(format,arCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("Date :\n"+ex.Message);
return "";
}
}
/// <summary>
/// Returned Formatted Gregorian date string
/// </summary>
/// <PARAM name="date"></PARAM>
/// <PARAM name="format"></PARAM>
/// <returns></returns>
public string FormatGreg(string date ,string format)
{
if (date.Length<=0)
{
cur.Trace.Warn("Format :Date String is Empty");
return "";
}
try
{
DateTime tempDate=DateTime.ParseExact(date,allFormats,
enCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
return tempDate.ToString(format,enCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("Date :\n"+ex.Message);
return "";
}
}
/// <summary>
/// Return Today Gregorian date and return it in yyyy/MM/dd format
/// </summary>
/// <returns></returns>
public string GDateNow()
{
try
{
return DateTime.Now.ToString("yyyy/MM/dd",enCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("GDateNow :\n"+ex.Message);
return "";
}
}
/// <summary>
/// Return formatted today Gregorian date based on your format
/// </summary>
/// <PARAM name="format"></PARAM>
/// <returns></returns>
public string GDateNow(string format)
{
try
{
return DateTime.Now.ToString(format,enCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("GDateNow :\n"+ex.Message);
return "";
}
}
/// <summary>
/// Return Today Hijri date and return it in yyyy/MM/dd format
/// </summary>
/// <returns></returns>
public string HDateNow()
{
try
{
return DateTime.Now.ToString("yyyy/MM/dd",arCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("HDateNow :\n"+ex.Message);
return "";
}
}
/// <summary>
/// Return formatted today hijri date based on your format
/// </summary>
/// <PARAM name="format"></PARAM>
/// <returns></returns>
public string HDateNow(string format)
{
try
{
return DateTime.Now.ToString(format,arCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("HDateNow :\n"+ex.Message);
return "";
}
}
/// <summary>
/// Convert Hijri Date to it's equivalent Gregorian Date
/// </summary>
/// <PARAM name="hijri"></PARAM>
/// <returns></returns>
public string HijriToGreg(string hijri)
{
if (hijri.Length<=0)
{
cur.Trace.Warn("HijriToGreg :Date String is Empty");
return "";
}
try
{
DateTime tempDate=DateTime.ParseExact(hijri,allFormats,
arCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
return tempDate.ToString("yyyy/MM/dd",enCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("HijriToGreg :"+hijri.ToString()+"\n"+ex.Message);
return "";
}
}
/// <summary>
/// Convert Hijri Date to it's equivalent Gregorian Date
/// and return it in specified format
/// </summary>
/// <PARAM name="hijri"></PARAM>
/// <PARAM name="format"></PARAM>
/// <returns></returns>
public string HijriToGreg(string hijri,string format)
{
if (hijri.Length<=0)
{
cur.Trace.Warn("HijriToGreg :Date String is Empty");
return "";
}
try
{
DateTime tempDate=DateTime.ParseExact(hijri,
allFormats,arCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
return tempDate.ToString(format,enCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("HijriToGreg :"+hijri.ToString()+"\n"+ex.Message);
return "";
}
}
/// <summary>
/// Convert Gregoian Date to it's equivalent Hijir Date
/// </summary>
/// <PARAM name="greg"></PARAM>
/// <returns></returns>
public string GregToHijri(string greg)
{
if (greg.Length<=0)
{
cur.Trace.Warn("GregToHijri :Date String is Empty");
return "";
}
try
{
DateTime tempDate=DateTime.ParseExact(greg,allFormats,
enCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
return tempDate.ToString("yyyy/MM/dd",arCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("GregToHijri :"+greg.ToString()+"\n"+ex.Message);
return "";
}
}
/// <summary>
/// Convert Hijri Date to it's equivalent Gregorian Date and
/// return it in specified format
/// </summary>
/// <PARAM name="greg"></PARAM>
/// <PARAM name="format"></PARAM>
/// <returns></returns>
public string GregToHijri(string greg,string format)
{
if (greg.Length<=0)
{
cur.Trace.Warn("GregToHijri :Date String is Empty");
return "";
}
try
{
DateTime tempDate=DateTime.ParseExact(greg,allFormats,
enCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
return tempDate.ToString(format,arCul.DateTimeFormat);
}
catch (Exception ex)
{
cur.Trace.Warn("GregToHijri :"+greg.ToString()+"\n"+ex.Message);
return "";
}
}
/// <summary>
/// Return Gregrian Date Time as digit stamp
/// </summary>
/// <returns></returns>
public string GTimeStamp()
{
return GDateNow("yyyyMMddHHmmss");
}
/// <summary>
/// Return Hijri Date Time as digit stamp
/// </summary>
/// <returns></returns>
public string HTimeStamp()
{
return HDateNow("yyyyMMddHHmmss");
}
/// <summary>
/// Compare two instances of string date
/// and return indication of their values
/// </summary>
/// <PARAM name="d1"></PARAM>
/// <PARAM name="d2"></PARAM>
/// <returns>positive d1 is greater than d2,
/// negative d1 is smaller than d2, 0 both are equal</returns>
public int Compare(string d1,string d2)
{
try
{
DateTime date1=DateTime.ParseExact(d1,allFormats,
arCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
DateTime date2=DateTime.ParseExact(d2,allFormats,
arCul.DateTimeFormat,DateTimeStyles.AllowWhiteSpaces);
return DateTime.Compare(date1,date2);
}
catch (Exception ex)
{
cur.Trace.Warn("Compare :"+"\n"+ex.Message);
return -1;
}
}
}
}
然后我创建了2个文本框HijriDate和GreDate，例如，当我用gregorian编写日期并单击ENTER将其转换为Hijri时，就需要用到它，反之亦然。我尝试了以下代码：
private void hijriDate_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Return)
{
greDate.text = date.HijriToGreg(hijriDate.Text);
}
}
private void greDate_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Return)
{
hijriDate.text = date.GregToHijri(greDate.Text);
}
}
[当我在hijridate文本框中输入hijri date并单击ENTER时，Hijridate文本框中的日期将被清除并在greDate文本框中转换为gregorian date，也当我在gredate文本框中输入gregorian date并单击ENTER时，在gredate文本框中将日期清除并转换为hijri hijridate文本框中的日期为什么清除它，我将如何同时保留日期回历和公历？
我认为您可以检查文本框hijriDate和greDate的多行属性，如果为true，则将其更改为false，当您单击Enter时，它会转到下一行，并且不会隐藏。
然后，如果您需要根据出生日期计算年龄，请使用以下代码：
private void hijriDate_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Return)
{
greDate.Text = date.HijriToGreg(hijriDate.Text);
int age = (int)((DateTime.Now - Convert.ToDateTime(greDate.Text)).TotalDays / 365.242199);
textAge.Text = age.ToString();
greDate.Focus();
}
}
您是否已验证各个变量中的日期？可能是因为按“ Enter”键已经移动了文本，因此在屏幕上不可见。
我写了以下代码，它工作正常：
private void hijriDate_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Return)
{
greDate.Text = new Dates().HijriToGreg(hijriDate.Text);
}
}
private void greDate_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Return)
{
hijriDate.Text = new Dates().GregToHijri(greDate.Text);
}
}