Hi Meenakhi,
To get values on the submit button you should get values without doing any thing just accessing the respective controls as usual arent you ? If not please paste your code.
Secondly if you are storing these values on the Server in DataTable than you needs to use ViewState Property like
private DataTable dt
{
get { return ViewState["dt"] == null ? (DataTable)ViewState["dt"] : new DataTable(); }
set { ViewState["dt"] = value; }
}
Thanks and Regards,
Rk_Hirpara.,