Adding leading zeros to date time C#

Question

What is the best way to add zeros to date time in C#

Example string "9/10/2011 9:20:45 AM" convert to string "09/10/2011 09:20:45 AM"

Answer 1

DateTime.Now.ToString("dd/MM/yyyy hh:mm:ss tt") // 12hour set
DateTime.Now.ToString("dd/MM/yyyy HH:mm:ss") // 24hour set

More information / methods about formatting Date can be found Here

From you comment

It's better to use the following to parse a DateTime

DateTime date = DateTime.MinValue;
DateTime.TryParse("9/10/2011 9:20:45 AM", out date);
return date.ToString("MM/dd/yyyy hh:mm:ss tt")

You can then check wether it fails by comparing it to DateTime.MinValue rather then crash the application if the Convert.ToDatetime fails

Answer 2

If you say, that it is both strings, then you should use the DateTime.TryParse method:

DateTime dt;
if (DateTime.TryParse("9/10/2011 9:20:45 AM", out dt))
{
    Console.WriteLine(dt.ToString("dd/MM/yyyy hh:mm:ss tt"));
}
else
{
    Console.WriteLine("Error while parsing the date");
}

Answer 3

myDate.ToString("dd/MM/yyyy hh:mm:ss tt")

Answer 4

DateTime dt = ...
dt.ToString("dd/MM/yyyy hh:mm:ss tt");

Answer 5

你可以使用string.Format("{0:dd/MM/yyyy hh:mm:ss}", dateTime);

Answer 6

使用string stringVariable = string.Format("{0:dd/MM/yyyy hh:mm:ss tt}", dateTimeVariable);

Answer 7

just use this code its will help you..

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms;

namespace DateTimeConvert { public partial class Form1 : Form { public Form1() { InitializeComponent(); }

  private void button1_Click(object sender, EventArgs e) { label1.Text= ConvDate_as_str(textBox1.Text); } public string ConvDate_as_str(string dateFormat) { try { char[] ch = dateFormat.ToCharArray(); string[] sps = dateFormat.Split(' '); string[] spd = sps[0].Split('.'); dateFormat = spd[0] + ":" + spd[1]+" "+sps[1]; DateTime dt = new DateTime(); dt = Convert.ToDateTime(dateFormat); return dt.Hour.ToString("00") + dt.Minute.ToString("00"); } catch (Exception ex) { return "Enter Correct Format like <5.12 pm>"; } } private void button2_Click(object sender, EventArgs e) { label2.Text = ConvDate_as_date(textBox2.Text); } public string ConvDate_as_date(string stringFormat) { try { string hour = stringFormat.Substring(0, 2); string min = stringFormat.Substring(2, 2); DateTime dt = new DateTime(); dt = Convert.ToDateTime(hour+":"+min); return String.Format("{0:t}", dt); ; } catch (Exception ex) { return "Please Enter Correct format like <0559>"; } } } }