how to change the date format manually ?

[MarcoB]
This solution will perform badly, since for dateTime.Year, dateTime.Month and dateTime.Day is a method and a property get operation called.
[/MarcoB]

look at this:

private  string ConvertDatetimeToValid(DateTime dateTime)
       {
           string datetime = string.Concat(dateTime.Day.ToString(), "/", dateTime.Month.ToString(), "/", dateTime.Year.ToString());
 
           return datetime;
       }

Hi,

after browsing this page[^] I found the following solution which helps you:

Source[^]

C#

DateTime dt = DateTime.Now;
String.Format("{0:MM/dd/yyyy}", dt);          // "03/09/2008"

in my idea..

use mask textbox..

1.select and drag masktextbox from toolbox
2.and cleck the masktextbox they have a arrow mark in above
3.click that one,they have a option like " set mask "
4.and click,select the " sort date " and click ok
5.run

i think this useful for you!!!