C＃中的日期时间格式

Question

I need "24/01/2012" but Why it always returns "24/1/2012"

when I am using this

txtFilingStartDate.Text = String.Format("{0:dd/MM/yyyy}", (SessionHelper.SearchFilingStartDate.Value.Day.ToString() + "/" + SessionHelper.SearchFilingStartDate.Value.Month.ToString() + "/" + SessionHelper.SearchFilingStartDate.Value.Year.ToString()));

Answer 1

只需这样做：

txtFilingStartDate.Text = String.Format("{0:dd/MM/yyyy}",SessionHelper.SearchFilingStartDate.Value);

Answer 2

SessionHelper.SearchFilingStartDate.Value seems to be a DateTime value.
Then pass it directly without all that string conversions for day, months and year.

txtFilingStartDate.Text = String.Format("{0:dd/MM/yyyy}",  
                          (SessionHelper.SearchFilingStartDate.Value);

The format string "dd/MM/yyyy" contains enough information to allow the Format method to prepare the resulting string directly from your DateTime value

Answer 3

You don't need the String.Format statement. You can do it with the Date's ToString method:

txtFilingStartDate = SessionHelper.SearchFilingStartDate.ToString.Value("dd/MM/yyyy");

There's a lot more information on the MSDN page for Custom Date and Time Format Strings

Answer 4

You are passing a string and the format you specified for it is unrecognized. Assuming that this is a datetime you are passing, don't do all that conversion first:

txtFilingStartDate.Text = String.Format("{0:dd/MM/yyyy}", SessionHelper.SearchFilingStartDate.Value)

Answer 5

When you format a string using a date/time formatting ( {0:dd/MM/yyyy} ) themethod is expecting an instance of DateTime , you are passing it a string

You probably want simply:

txtFilingStartDate.Text = String.Format("{0:dd/MM/yyyy}",SessionHelper.SearchFilingStartDate.Value);