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How to add a century prefix to a birth date?

Trying to figure out how to add a century prefix (19 or 20) to a birth date. Does anyone see how to write this in a better way?
public string GetCenturyPrefix(string socSecNo)
{
string prefix = string.Empty;
try
{
var currentDate = DateTime.Now;
var birthDayTemp = socSecNo.Substring(0, 6);
var yy = birthDayTemp.Substring(0, 2);
var mm = birthDayTemp.Substring(2, 2);
var dd = birthDayTemp.Substring(4, 2);
birthDayTemp = yy + "-" + mm + "-" + dd;
var birthDay = Convert.ToDateTime(birthDayTemp);
var totalDays = currentDate - birthDay;
var age = totalDays.TotalDays / 365;
var yearsAfter2000 = Convert.ToInt32(currentDate.Year.ToString().Substring(2, 2));
if (age > yearsAfter2000)
{
prefix = "19";
}
else
{
prefix = "20";
}
}
catch (Exception)
{
}
return prefix;
}

Don't use Substring to parse a string value into a DateTime. .Net has very robust methods created for you to do this conversion.
Here I'm using DateTime.TryParseExact(), which lets me specify the exact format I expect dates values to be provided in. The method returns true or false indicating if the value is in that supplied format. No need to use exceptions to control logic flow.
public string GetCenturyPrefix(string socSecNo)
{
// Check if you're able to parse the incoming value
// in the format "yyMMdd".
if (!DateTime.TryParseExact(socSecNo, "yyMMdd", CultureInfo.InvariantCulture,
DateTimeStyles.None, out DateTime parsedDateTime))
{
// Do something if the input can't be parsed in that format.
// In this example I'm throwing an exception, but you can also
// return an empty string.
throw new Exception("Not valid date format");
}
// Extract only the Year portion as a 4 digit string,
// and return the first 2 characters.
return parsedDateTime.ToString("yyyy").Substring(0, 2);
}

You can do it like (year/100)+1 but put {0:n0} format to your .ToString("{0:n0}") this could be the logic and for the if else it can stay like that. This should be working for any century as I tried on calculator.

Formatting the JSON date value

I am accessing data from an API, and it returns the date value in the JSON as formatted as 2014-12-01. I have assigned this to the class and bound to a textblock within a listbox control, and it displays fine. However, is there a way that I can display the date in the format "Thursday 20th Decemeber 2014".
I am using c# .NET for windows phone 8. Code Snippet below on how the data is returned.
while (count < ja.Count) {
SkiddleEvents content = new SkiddleEvents();
//EVENT DETAILS
if (ja[count]["imageurl"] != null) {
content.str_eventImage = ja[count]["imageurl"].ToString();
}
else {
Uri imageUrl = new Uri("/Assets/placeholder.jpg", UriKind.Relative);
content.str_eventImage = imageUrl.ToString();
}
content.str_eventID = ja[count]["id"].ToString();
content.str_eventName = ja[count]["eventname"].ToString();
content.str_eventDate = ja[count]["date"].ToString();
content.str_eventAddress = ja[count]["venue"]["address"].ToString() + ", " + ja[count]["venue"]["town"].ToString();
content.str_venueID = ja[count]["venue"]["id"].ToString();
//add the content to the list box and increase the count
contentList.Add(content);
count++;
}

Change this line to:
DateTime eventDate = DateTime.MinValue;
if (DateTime.TryParse(ja[count]["date"], out eventDate))
{
content.str_eventDate = string.Format("{0:dddd dd}{1} {0:MMMM yyyy}",
eventDate,
(eventDate.Day == 1)
? "st"
: (eventDate.Day == 2)
? "nd"
: (eventDate.Day == 3)
? "rd"
: "th");
}
That should get you the format you want.
DateTime formatting taken from here: Getting day suffix when using DateTime.ToString()

Convert the JSON date field to a DateTime object.
DateTime dt = DateTime.Parse(content.str_eventDate = ja[count]["date"].ToString());
string formattedDate = dt.ToString("G");
See here for the custom date / time formats.

Convert Javascript time string to DateTime or TimeSpan in MVC Controller

How do I covert JavaScript string "5:00 PM" to DateTime or TimeSpan when it get send to the MVC controller. I am using
bootstrap-timepicker
// usage
<script type="text/javascript">
$('#timepicker1').timepicker();
</script>
Javascript payload
{
Skip: 0
Status: []
Take: 15
DueTime: "1:00 PM" // keep in mind that this is a string
}
Server Object would be something like
class TimeSheet
{
public TimeSpan DueTime;
}

Use DateTime.Parse. Convert on server(on controller) when your string would transmit with your time.
http://msdn.microsoft.com/ru-ru/library/system.datetime.parse(v=vs.110).aspx

Okay so I read everyhting wrong hence the deleted answer.. !
But I'm not giving up ;)
Your bootstrap-timepicker, will give you a time as this "1:00 PM".
But before that we are going to look on the serverside to see what we can parse into a datetime object.
This is C# for parsing datetime.
string dateString, format;
DateTime result;
CultureInfo provider = CultureInfo.InvariantCulture;
dateString = "15/08/2000 16:58"
format = "dd/MM/yyyy HH:mm"
result = DateTime.ParseExact(dateString, format, provider);
Now as you se your string wont look like that I'm going to assume that you want todays date!
This is function I tend to use most of the times when converting, to 24H clock.
function ConvertTimeformat(str) {
var time = str;
var hours = Number(time.match(/^(\d+)/)[1]);
var minutes = Number(time.match(/:(\d+)/)[1]);
var AMPM = time.match(/\s(.*)$/)[1];
if (AMPM == "PM" && hours < 12) hours = hours + 12;
if (AMPM == "AM" && hours == 12) hours = hours - 12;
var sHours = hours.toString();
var sMinutes = minutes.toString();
if (hours < 10) sHours = "0" + sHours;
if (minutes < 10) sMinutes = "0" + sMinutes;
//Creating the todays date in the right format
var today = new Date();
var dd = today.getDate();
var mm = today.getMonth()+1;//January is 0!`
var yyyy = today.getFullYear();
if(dd<10){dd='0'+dd}
if(mm<10){mm='0'+mm}
var todaysdate = dd+'/'+mm+'/'+yyyy +" " ; //<--I added an extra space!
var hoursNminutes = sHours + ":" + sMinutes
//CREATE THE RIGHT FORMAT FOR DATE.PARSEXACT "dd/MM/yyyy HH:mm"
var dateToParse = todaysdate + hoursNminutes
return dateToParse;
}
To Use the function do like this!
//Call it and provide your bootstrap time. And make it return to a variable
var dateToBeSentToServer = ConvertTimeformat("1:00 PM");
//OR With the bootstraptime as a variable
var dateToBeSentToServer = ConvertTimeformat(timevariable);
Now you can send dateToBeSentToServer to your serverside for parsing!

Convert DateTime To JSON DateTime

I have a WebService which return DateTime Field.
I get a result /Date(1379048144000)/ but
i want just 1379048144000 how can i achieve that.
[WebMethod]
public DateTime GetServerDate()
{
return DateTime.Now;
}
by setting Header Content-Type: application/json; charset=utf-8; i got a result like /Date(1379048144000)/.

You could change your WS to return a long with the value of the DateTime. The value to return is the number of milliseconds since the Unix Epoch (01/01/1970). This could be done with an extension method on DateTime something like:
public static class DateTimeExtensions
{
...
private static readonly DateTime UnixEpoch = new DateTime(1970, 1, 1);
public static long ToUnixTime(this DateTime dateTime)
{
return (dateTime - UnixEpoch).Ticks / TimeSpan.TicksPerMillisecond;
}
...
}
And your web service method might look something like:
public long GetMyDate(...)
{
DateTime dateTime = ...;
return dateTime.ToUnixTime();
}

with Json.NET :
string date = Newtonsoft.Json.JsonConvert.SerializeObject(DateTime.Now);

in client side you can use this function to show a right date to client(I use it on my projects):
function parseJsonDate(jsonDate) {
var offset = new Date().getTimezoneOffset() * 60000;
var parts = /\/Date\((-?\d+)([+-]\d{2})?(\d{2})?.*/.exec(jsonDate);
if (parts[2] == undefined) parts[2] = 0;
if (parts[3] == undefined) parts[3] = 0;
d = new Date(+parts[1] + offset + parts[2] * 3600000 + parts[3] * 60000);
date = d.getDate() + 1;
date = date < 10 ? "0" + date : date;
mon = d.getMonth() + 1;
mon = mon < 10 ? "0" + mon : mon;
year = d.getFullYear();
return (date + "." + mon + "." + year);
};
This function is return right date in format: dd.mm.yyyy, but you can change it if you need. I hope that I help you.

U can always solve your problem when sending a date in a JSON object to JS by converting the date as follows:
var myJSDate = (new Date(parseInt(obj.MyDate.substr(6)))).toJSON();
Where obj.Date contains the date you wanna format.
Then u'll get something like this: "2013-10-25T18:04:17.289Z"
U can always check it in Chrome console by writing:
(new Date()).toJSON();
Hope this helps!

There are two solutions:
client side:
function ToJavaScriptDate(value) {
var pattern = /Date\(([^)]+)\)/;
var results = pattern.exec(value);
var dt = new Date(parseFloat(results[1]));
return (dt.getMonth() + 1) + "/" + dt.getDate() + "/" + dt.getFullYear();
}
It is possible to need alsou to convert into data object
var date = new Date(xxx)
Server side:
Newtonsoft.Json.JsonConvert.SerializeObject(your_object)

Simply write like this to convert your date string in JSON format.
date = "{" + date + "}";

try regex:
var jsonDate = #"/Date(1379048144000)/";
var regex = /-?\d+/;
var jsonDate = re.exec(jsonDate);
var dateOriginal = new Date(parseInt(m[0]));

c# months and years between given dates

I try to popup a msgbox that shows the months and years of the given dates for example
my input is:
7/2012 and 2/2013
and the output should be:
7/2012,8/2012,9/2012,10/2012,11/2012,12/2012,1/2013,2/2013
I wrote:
string datePart1;
string datePart2;
string[] date1 = new string[] { "" };
string[] date2 = new string[] { "" };
private void button1_Click(object sender, EventArgs e)
{
DateTime endDate = new DateTime(2013, 2, 1); // i will be having the date time as a variable from a textbox
DateTime begDate = new DateTime(2012, 7, 1); // i will be having the date time as a variable from a text box
int year, month;
if (endDate.Month - begDate.Month < 0)
{
month = (endDate.Month - begDate.Month) + 12;
endDate = new DateTime(endDate.Year - 1, endDate.Month, endDate.Day);
}
else
month = endDate.Month - begDate.Month;
year = endDate.Year - begDate.Year;
The above code calculates the time difference, but my attempts at outputting haven't worked.

Here's a sample to get you started.
It provides a handy MonthsInRange() method which returns a sequence of all the months in the specified range. You can then format the returned dates using "M\\/yyyy" (see below) to output the required format. (Note: That's not a letter V, it's a backslash followed by a forward slash!)
See Custom Date and Time Format Strings for an explanation of the format string.
using System;
using System.Collections.Generic;
namespace Demo
{
public static class Program
{
static void Main(string[] args)
{
DateTime endDate = new DateTime(2013, 2, 1);
DateTime begDate = new DateTime(2012, 7, 1);
foreach (DateTime date in MonthsInRange(begDate, endDate))
{
Console.WriteLine(date.ToString("M\\/yyyy"));
}
}
public static IEnumerable<DateTime> MonthsInRange(DateTime start, DateTime end)
{
for (DateTime date = start; date <= end; date = date.AddMonths(1))
{
yield return date;
}
}
}
}
Why "M\\/yyyy" and not just "M/yyyy"?
This is because the "/" character in a DateTime format string will be interpreted as the "date separator", not a literal "/". In some locales, this will come out as "." and not "/".
To fix this, we need to escape it with a "\" character. However, we can't just use a single "\" because C# itself will interpret that as an escape character, and will use it to escape the following character. The C# escape sequence for a literal "\" is "\\", which is why we have to put "\\/" and not just "\/".
Alternatively you can turn of escaping of "\" characters by prefixing the string with an # character, like so:
#"M/yyyy"
You can use whichever you prefer.

Since you're not guaranteed to have dates with the same day, you can use this code which creates new dates that only consider the first of the month.
static IEnumerable<string> InclusiveMonths(DateTime start, DateTime end)
{
// copies to ensure the same day.
var startMonth = new DateTime(start.Year, start.Month, 1);
var endMonth = new DateTime(end.Year, end.Month, 1);
for (var current = startMonth; current <= endMonth; current = current.AddMonths(1))
yield return current.ToString("M/yyyy");
}
// usage
foreach (var mmyyyy in InclusiveMonths(begDate, endDate))
{
Console.WriteLine(mmyyyy);
}
var allMonths = string.Join(", ", InclusiveMonths(begDate, endDate));

Look into using the TimeSpan structure, it'll help you achieve your goal a lot faster.
http://msdn.microsoft.com/en-us/library/system.timespan.aspx

You may use
TimeSpan dateDifference = endDate - begDate;
year = dateDifference.Days / 365;
month = dateDifference.Days / 30;
Edit:
I forgot TimeSpan does not feature Year or Month, sorry :(