How to get mp3 audio length in wp7??

[EngDev]

I want to get the duration time (length) of the song in wp7 by c#

[wizard_hu_]

Have you tried MediaElement.NaturalDuration? Based on the docs I would assume that it will be available after the MediaOpened event.

[joaocardoso]

Have you tried MediaElement.NaturalDuration? Based on the docs I would assume that it will be available after the MediaOpened event.

And you are correct. In fact you should not try to get it until you have that event raised. Unfortunally these is no way, afaik, to get the length of a song until its opened. The you can do something like:
using c#
double songLength = mySoundObject.NaturalDuration.TimeSpan.Seconds;

using vb.net
dim songLength as Double = mySoundObject.NaturalDuration.TimeSpan.Seconds

[amlimonet]

Have you check if mp3 duration is included on TAG information?