Question

I have a string like this “10/13/2009 12:00:00 AM”

how can i convert it to YYYYMMDD format using c#

Answer 1

Work out the two formats you want, then use:

DateTime dt = DateTime.ParseExact(input, inputFormat, 
                                  CultureInfo.InvariantCulture);
string output = dt.ToString(outputFormat, CultureInfo.InvariantCulture);

For example:

using System;
using System.Globalization;

class Test
{
    static void Main(string[] args)
    {
        string input = "10/13/2009 12:00:00 AM";
        string inputFormat = "MM/dd/yyyy HH:mm:ss tt";
        string outputFormat = "yyyyMMdd";
        DateTime dt = DateTime.ParseExact(input, inputFormat, 
                                          CultureInfo.InvariantCulture);
        string output = dt.ToString(outputFormat, CultureInfo.InvariantCulture);
        Console.WriteLine(output);
    }
}