How to Convert Date Format to Dd-Mm-Yyyy in C#

convert datetime to date format dd/mm/yyyy

DateTime dt = DateTime.ParseExact(yourObject.ToString(), "MM/dd/yyyy hh:mm:ss tt", CultureInfo.InvariantCulture);

string s = dt.ToString("dd/M/yyyy", CultureInfo.InvariantCulture);

DateTime Convert from MMM-yyyy to dd-MM-yyyy or yyyy-MM-dd

Use

DateTime.ParseExact(dt, "MMM-yyyy", CultureInfo.InvariantCulture)

This will give you first of the month anyway.

how to change date format to mm/dd/yyyy to dd/mm/yyyy in c#

Or Try to parse the datetime.
For example

DateTime dateformat = DateTime.ParseExact(Convert.ToDateTime(bin.timestamp), "dd/M/yyyy h:mm:ss tt",CultureInfo.InvariantCulture);
binModel.UpdatedTime = TimeZoneInfo.ConvertTimeFromUtc(dateformat,TimeZoneInfo.FindSystemTimeZoneById("India Standard Time")).ToString();

how to convert mm/dd/yyyy format to dd/mm/yyyy in c#

You need to change the string format slightly as the string you're using is not valid. Change hh to h:

DateTime dt = DateTime.ParseExact(data.updatedDate.ToString(), "MM/dd/yyyy h:mm:ss tt",CultureInfo.InvariantCulture);

If you're passing a string that can have single digit for month or day then you should use the following:

"M/d/yyyy h:mm:ss tt"

If it always has 2 digit for month and date then you can use:

"MM/dd/yyyy h:mm:ss tt"

hh means use 2 digits for the hour, h means use one (where possible). You're also setting tt which displays AM/PM which could be causing the issue when used with hh.

EDIT: (From your comments) If updatedDate is a DateTime object then you can just do:

var time = updatedDate.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);

Converting dd/mm/yyyy formatted string to Datetime

You need to use DateTime.ParseExact with format "dd/MM/yyyy"

DateTime dt=DateTime.ParseExact("24/01/2013", "dd/MM/yyyy", CultureInfo.InvariantCulture);

Its safer if you use d/M/yyyy for the format, since that will handle both single digit and double digits day/month. But that really depends if you are expecting single/double digit values.

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Your date format day/Month/Year might be an acceptable date format for some cultures. For example for Canadian Culture en-CA DateTime.Parse would work like:

DateTime dt = DateTime.Parse("24/01/2013", new CultureInfo("en-CA"));

Or

System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("en-CA");
DateTime dt = DateTime.Parse("24/01/2013"); //uses the current Thread's culture

Both the above lines would work because the the string's format is acceptable for en-CA culture. Since you are not supplying any culture to your DateTime.Parse call, your current culture is used for parsing which doesn't support the date format. Read more about it at DateTime.Parse.

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Another method for parsing is using DateTime.TryParseExact

DateTime dt;
if (DateTime.TryParseExact("24/01/2013", 
                            "d/M/yyyy", 
                            CultureInfo.InvariantCulture, 
                            DateTimeStyles.None,
    out dt))
{
    //valid date
}
else
{
    //invalid date
}

The TryParse group of methods in .Net framework doesn't throw exception on invalid values, instead they return a bool value indicating success or failure in parsing.

Notice that I have used single d and M for day and month respectively. Single d and M works for both single/double digits day and month. So for the format d/M/yyyy valid values could be:

• "24/01/2013"
• "24/1/2013"
• "4/12/2013" //4 December 2013
• "04/12/2013"

For further reading you should see: Custom Date and Time Format Strings

How to convert any date format to yyyy-MM-dd

string DateString = "11/12/2009";
IFormatProvider culture = new CultureInfo("en-US", true); 
DateTime dateVal = DateTime.ParseExact(DateString, "yyyy-MM-dd", culture);

These Links might also Help you

DateTime.ToString() Patterns

String Format for DateTime [C#]

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