字符串未被识别为有效的DateTime

Question

"String was not recognized as a valid DateTime " error was occurred when I tried to convert a string to DateTime .

I stored the current date using getDate() method into my DB. And it was set as DateTime . I retrieved it and display in a DetailsView . And later I retrieve from the DetailsView and set on a label.

Label ForgotDatelbl = new Label();
ForgotDatelbl = (Label)DetailsView2.FindControl("ForgotPwLabel");

DateTime ForgotDate = DateTime.ParseExact(ForgotDatelbl.ToString(),
      "d/M/yyyy hh:mm:ss tt", null); //here is the error

if (DateTime.Now < ForgotDate.AddMinutes(3)) { 
} 

Source Error:

Line 28:             DateTime ForgotDate = DateTime.ParseExact(ForgotDatelbl.ToString(),"d/M/yyyy hh:mm:ss tt", null);
Line 29: 
Line 30:             if (DateTime.Now < ForgotDate.AddMinutes(3))

and in my database the time was like this - 20/7/2012 7:42:19 PM

EDIT

IFormatProvider theCultureInfo = new System.Globalization.CultureInfo("en-GB", true);
DateTime ForgotDate = DateTime.ParseExact(ForgotDatelbl.ToString(), "dd/M/yyyy hh:mm:ss tt", theCultureInfo);

However, error still remain..

Answer 1

Try to change the format with only 1h specifier:

//20/7/2012 7:42:19 PM
"dd/M/yyyy h:mm:ss tt",

Answer 2

在重载方法中使用Culture

Answer 3

Please consider the following

string dateString = "20/7/2012 7:42:19 PM";

//can be this in your case: string dateLabel = ForgotDatelbl.Text;

var culture = new CultureInfo("en-GB");
var date = DateTime.Parse(dateString, culture, DateTimeStyles.RoundtripKind);

This parses an exact match of what you want.