protected void BindZuoye()
{
string username = ((FormsIdentity)HttpContext.Current.User.Identity).Ticket.Name;
string kechengid = Session["kechengid"].ToString();
DataTable dt = ZuoyeInfo.GetStuKechengZuoyeInfo(username, int.Parse(kechengid));
GridView1.DataSource = dt;
GridView1.DataBind();
}