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Conversion of javascript date to c# date

Posted on 2013-02-06
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Last Modified: 2013-02-06
Hi

First off, I have zero experience with javascript, but I need to convert a datetime value in some html into a DateTime in c#.

In the html I see the following:

<script type="text/javascript">
    jQuery(document).ready(function() {
        jQuery('span.LocalTime').localTime('en');
    });
</script>

<td class="headerColored">
<span class='LocalTime' gmt_time='1360039849'></span>
</td>

That "gmt_time" is displaying in the browser as "Feb 05, 2013, 06:50AM"

My timezone is UTC+2

Can anybody help?
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Question by:zattz
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8 Comments
 

Author Comment

by:zattz
ID: 38858513
I have found the following function in the source javascript files:

/**
 * Calculates the User's local time using JS.
 *
 */
 
jQuery.fn.localTime = function() {
      this.self = this;
      self.selectedFormat = arguments[0];
      self.section = arguments[1];

      self.format = function() {
        if (self.section == 'billing') {
          switch(self.selectedFormat) {
              case 'en': return '%m/%d/%Y'; break;
              case 'es': return '%d de %n %Y'; break;
              case 'fr': return '%d %f %Y'; break;
              case 'pt': return '%d de %r %Y'; break;
              case 'de': return '%d. %g %Y'; break;
              case 'it': return '%d %t %Y'; break;
              case 'ja': return '%Y/%m/%d'; break;
              case 'zh': return '%Y/%m/%d'; break;
              case 'zh_TW': return '%Y/%m/%d'; break;
              default: return '<nobr>%d %b %Y</nobr>';
          }
        } else if (self.section == 'timeOnly') {
          switch (self.selectedFormat) {
              case 'en': return '%I:%M'; break;
              case 'es': return '%I:%M'; break;
              case 'fr': return '%I h %M'; break;
              case 'pt': return '%I:%M'; break;
              case 'de': return '%I.%M'; break;
              case 'it': return '%I:%M'; break;
              case 'ja': return '%I:%M'; break;
              case 'zh': return '%I:%M'; break;
              case 'zh_TW': return '%I:%M'; break;
              default: return '<nobr>%I:%M</nobr>';
          }
        } else if (self.section == 'board') {
            switch(self.selectedFormat) {
                case 'en': return '%b %e at %J:%M %p'; break;
                case 'es': return '%d de %n %Y %H:%M'; break;
                case 'fr': return 'le %e %f %Y %H h %M'; break;
                case 'pt': return '%e de %r %Y %H:%M'; break;
                case 'de': return '%e. %g %Y %H.%M'; break;
                case 'it': return '%e %t %Y, %H:%M'; break;
                case 'ja': return '%Y/%m/%d  %H:%M'; break;
                case 'zh': return '%Y/%m/%d  %H:%M'; break;
                case 'zh_TW': return '%Y/%m/%d  %H:%M'; break;
                default: return '<nobr>%d %b %Y</nobr> at <nobr>%H:%M</nobr>';
            }
        } else {      
            switch(self.selectedFormat) {
                case 'en': return '%b %d, %Y at %I:%M %p'; break;
                case 'es': return '%d de %n %Y %H:%M'; break;
                case 'fr': return 'le %d %f %Y %H h %M'; break;
                case 'pt': return '%d de %r %Y %H:%M'; break;
                case 'de': return '%d. %g %Y %H.%M'; break;
                case 'it': return '%d %t %Y, %H:%M'; break;
                case 'ja': return '%Y/%m/%d  %H:%M'; break;
                case 'zh': return '%Y/%m/%d  %H:%M'; break;
                case 'zh_TW': return '%Y/%m/%d  %H:%M'; break;
                default: return '<nobr>%d %b %Y</nobr> at <nobr>%H:%M</nobr>';
            }
        }
      };
     
      self.calculateTime = function(gmt) {
        return self.strftime(new Date(parseInt(gmt) * 1000));
      };

      self.strftime = function(theDate) {
        var fmt = self.format();

        for (var s in self.strftime_funcs)
          if (s.length == 1)
            fmt = fmt.replace('%' + s, self.strftime_funcs[s](theDate));
       
        return fmt;
      };
     
      self.strftime_funcs = {
        zeropad: function(n) { return n>9 ? n : '0'+n; },
        A:       function(t) { return ['Sunday','Monday','Tuedsay','Wednesday','Thursday','Friday','Saturday'][t.getDay()] }, //English Days
        F:       function(t) { return ['Dimanche','Lundi','Mardi','Mercredi','Jeudi','Vendredi','Samedi'][t.getDay()] }, //French Days
        N:       function(t) { return ['Domingo','Lunes','Martes','Mi&eacute;rcoles','Jueves','Viernes','S&aacute;bado'][t.getDay()] }, //Spanish Days
        G:       function(t) { return ['Sonntag','Montag','Dienstag','Mittwoch','Donnerstag','Freitag','Samstag'][t.getDay()] }, //German Days
        R:       function(t) { return ['Domingo','Segunda-feira','Ter&ccedil;a-feira','Quarta-feira','Quinta-feira','Sexta-feira','S&aacute;bado'][t.getDay()] }, //Portuguese Days
        T:       function(t) { return ['domenica','lunedì-feira','martedì','mercoledì','giovedì','venerdì','sabato'][t.getDay()] }, //Italian Days
       
        b:       function(t) { return ['January','February','March','April','May','June', 'July','August', 'September','October','November','December'][t.getMonth()] }, //English Months
        f:       function(t) { return ['janvier','février','mars','avril','mai','juin', 'juillet','août', 'septembre','octobre','novembre','décembre'][t.getMonth()] }, //French Months
        n:       function(t) { return ['enero','febrero','marzo','abril','mayo','junio', 'julio','agosto', 'septiembre','octubre','noviembre','diciembre'][t.getMonth()] }, //Spanish Months
        g:       function(t) { return ['Junuar','Februar','März','April','Mai','Juni', 'Juli','August', 'September','Oktober','November','Dezember'][t.getMonth()] }, //German Months
        r:       function(t) { return ['janeiro','fevereiro','março','abril','maio','junho', 'julho','agosto', 'setembro','outubro','novembro','dezembro'][t.getMonth()] }, //Portuguese Months
        t:       function(t) { return ['gennaio','febbraio','marzo','aprile','maggio','giugno', 'luglio','agosto', 'settembre','ottobre','novembre','dicembre'][t.getMonth()] }, //Italian Months
       
        c:       function(t) { return t.toString(); },
        d:       function(t) { return this.zeropad(t.getDate()); },
        e:       function(t) { return t.getDate(); },
        H:       function(t) { return this.zeropad(t.getHours()); },
        I:       function(t) { var h = t.getHours() % 12; if(h == 0){return 12;} return this.zeropad(h); },
        J:       function(t) { var h = t.getHours() % 12; if(h == 0){return 12;} return h; },
        m:       function(t) { return this.zeropad(t.getMonth()+1); }, // month-1
        M:       function(t) { return this.zeropad(t.getMinutes()); },
        p:       function(t) { return this.H(t) < 12 ? 'AM' : 'PM'; },
        S:       function(t) { return this.zeropad(t.getSeconds()); },
        w:       function(t) { return t.getDay(); }, // 0..6 == sun..sat
        y:       function(t) { return this.zeropad(this.Y(t) % 100); },
        Y:       function(t) { return t.getFullYear(); },
        Z:       function(t) {
                    if (t.getTimezoneOffset() > 0) {
                        return "-" + this.zeropad(t.getTimezoneOffset()/60) + "00";
                    } else {
                        return "+" + this.zeropad(Math.abs(t.getTimezoneOffset())/60) + "00";
                    }
                },    
        '%':     function(t) { return '%'; }
      };
     
      return this.each(function() {
          var runTrans = true;
          if (jQuery(this).attr('run_trans')) {
              runTrans = jQuery(this).attr('run_trans')=='yes'?true:false;
          }
          if (runTrans) {
              jQuery(this).html(self.calculateTime(jQuery(this).attr('gmt_time')));
          }
      });
};

jQuery.fn.localAge = function() {
    this.self = this;

    self.getDaysInMonth = function (month, year) {
          return 32 - new Date(year, month - 1, 32).getDate();
    };
   
    self.fixDate = function (day, month, year) {
          var daysInMonth;
         
        if (day <= 0) {            
              month--;
             
              if (month <= 0) {
                  month = 12 + month; // max month + possibly negative month
                  year--;
              }
             
              day = self.getDaysInMonth(month, year) + day; // days in month + possibly negative day
        } else if (month <= 0) {
            month = 12 + month; // max month + possibly negative month
            year--;
           
            daysInMonth = self.getDaysInMonth(month, year);
           
            if (day > daysInMonth)
                day = daysInMonth - (day - daysInMonth - 1);
        }
         
          return { day: day, month: month, year: year };
    };
   
    self.calculateAge = function (gmt) {
        return self.strfage(1000 * parseInt(gmt));
    };
   
    self.strfage = function (timestamp) {
          var today, day, month, year, threshold, newDate, dayOfWeek, startingYear, startingMonth;
       
        today = new Date();
        day = today.getDate();
        month = today.getMonth() + 1;
        year = today.getFullYear();
       
        threshold = new Date(year, month - 1, day).getTime();
       
        if (timestamp >= threshold)
            return mhDictionary.profile.today;
           
        day--;
       
        newDate = self.fixDate(day, month, year);
        day = newDate.day;
        month = newDate.month;
        year = newDate.year;
        threshold = new Date(year, month - 1, day).getTime();
           
        if (timestamp >= threshold)
            return mhDictionary.profile.yesterday;
           
        dayOfWeek = today.getDay();
        if (dayOfWeek > 0) {
            day -= dayOfWeek;
           
            newDate = self.fixDate(day, month, year);
            day = newDate.day;
            month = newDate.month;
            year = newDate.year;
            threshold = new Date(year, month - 1, day).getTime();
             
              if (timestamp >= threshold)
                  return mhDictionary.profile.thisWeek;
        }
       
        day -= 7;
       
        newDate = self.fixDate(day, month, year);
        day = newDate.day;
        month = newDate.month;
        year = newDate.year;
        threshold = new Date(year, month - 1, day).getTime();
           
        if (timestamp >= threshold)
            return mhDictionary.profile.lastWeek;
           
        if (month == (today.getMonth() + 1) && day > 1) { // last week isn't last month
              day = 1;
             
              threshold = new Date(year, month - 1, day).getTime();
                 
              if (timestamp >= threshold)
                  return mhDictionary.profile.overTwoWeeks;

              //if (timestamp >= threshold)
              //    return mhDictionary.profile.thisMonth;
        }
       
        month--;
       
        newDate = self.fixDate(day, month, year);
        day = newDate.day;
        month = newDate.month;
        year = newDate.year;
        threshold = new Date(year, month - 1, day).getTime();
           
        if (timestamp >= threshold)
              return mhDictionary.profile.overTwoWeeks;

        //if (timestamp >= threshold)
            //return mhDictionary.profile.lastMonth;
           
        startingMonth = month;
           
        for (month--; month > 0; month--) {
            newDate = self.fixDate(day, month, year);
            day = newDate.day;
            month = newDate.month;
            year = newDate.year;
            threshold = new Date(year, month - 1, day).getTime();
           
              if (timestamp >= threshold)
                  return mhDictionary.profile.overTwoWeeks;

              //if (timestamp >= threshold)
              //    return mhDictionary.profile.monthsAgo.replace('%MONTHS%', startingMonth - month + 2);
        }
       
        year--;
       
        newDate = self.fixDate(day, month, year);
        day = newDate.day;
        month = newDate.month;
        year = newDate.year;
        threshold = new Date(year, month - 1, day).getTime();
       
        if (timestamp >= threshold)
             return mhDictionary.profile.overTwoWeeks;

        //if (timestamp >= threshold)
        //    return mhDictionary.profile.lastYear;
           
        startingYear = year;
       
        do {
            year--;
           
            newDate = self.fixDate(day, month, year);
            day = newDate.day;
            month = newDate.month;
            year = newDate.year;
            threshold = new Date(year, month - 1, day);
        } while (timestamp < threshold); // let's hope it's not too long ago
           
        //return mhDictionary.profile.yearsAgo.replace('%YEARS%', startingYear - year + 1);
        return mhDictionary.profile.overTwoWeeks;
    };
   
    return this.each(function() {
        jQuery(this).html(self.calculateAge(jQuery(this).attr('gmt_time')));
    });
};
0
 
LVL 42

Expert Comment

by:sedgwick
ID: 38858655
sorry i might misunderstood you but why do u need to convert it to C# datetime in your client side?
do u pass the datetime to C# code server side, and that's where you need the conversion?
0
 

Author Comment

by:zattz
ID: 38858661
No. I have some raw html files I am saving to a database, and don't know how to convert the javascript date "1360039849" to "Feb 05, 2013, 06:50AM"
0
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LVL 42

Expert Comment

by:sedgwick
ID: 38858776
here:

var d = new Date(0); // The 0 there is the key, which sets the date to the epoch
var utcdate = d.toUTCString('1360039849');

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from convert-utc-epoch-to-local-date-with-javascript
0
 

Author Comment

by:zattz
ID: 38858792
I need to convert the 1360039849 into a DateTime in c#
0
 
LVL 42

Accepted Solution

by:
sedgwick earned 500 total points
ID: 38858800
try this in your javascript code:
var d= new Date(); 
d = d.toUTCString(1360039849);
alert(d);

Open in new window

0
 

Author Comment

by:zattz
ID: 38858803
I got it.

var epoch = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(1360039849);

Thank you
0
 

Author Closing Comment

by:zattz
ID: 38858805
Thanks for the help
0

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