How do I convert a datetime with milliseconds to a string in C#?

I want to convert:

5/25/2010 12:54:56:000 

to:

052520101254开发者_StackOverflow中文版56000 

How do I do that in C#?

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You can use a custom format string. Example:

string formatted = DateTime.Now.ToString("MMddyyyyHHmmssfff");

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Try this:

DateTime.Now.ToString("HH:mm:ss.ffffff");

http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx

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Using the ToString() method on your DateTime, passing a custom format string: http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx (I assume you currently have a DateTime object.)

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To get the total Milliseconds only as a string use this:

TimeSpan value = (DateTime.Now - DateTime.MinValue);
string milliseconds = value.TotalMilliseconds.ToString();

If you want to store and/or compare the DateTime value, then I suggest you use the .Ticks property of the DateTime as a string, because you can reconstruct a DateTime value passing the ticks as a constructor argument.