Sharma filed his nomination papers today, official sources said.
Rajasthan Congress president Sachin Pilot, former union ministers Bhanwar Jintendra Singh, Girija Vyas, the party's former state chief Chandrabhan, Congress MLA Pradhyumn Singh and other leaders were present on the occasion.
The bypoll was necessitated as BSP's B L Kushwah's membership to the Rajasthan Assembly was terminated after he was sentenced to life imprisonment on December 8 last year.
Last month, Kushwah's wife, Shobha Rani, had joined the BJP. She has been declared the party's candidate for the bypoll.
Dholpur is the hometown of Chief Minister Vasundhara Raje.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)