No. No no no and no. The connector is almost the same, but the wireing is completely different. Can't be done, don't do it, as here's what will happen:
Originally Posted by shakezor
You CANNOT use the iPod docks with the Sansa. I know from (stupid) personal experience.
I tried it, and all I got was sparks, smoke, nasty rubber burning smell, and an orange wheel light (ha!) . Also the screen gets all warped and you can't make out the videos nor pictures, making about 2/3's of your Sansa useless.
I'm such an idiot for trying it but hey, now everyone here knows that, or maybe y'all already did . . .