protected void ddl_Student_SelectedIndexChanged(object sender, EventArgs e)
{
List <StudentMaster> Obj_St = StudentMasterBuss.GetStudentDetails(ddl_Student.SelectedValue);
if (Obj_St != null && Obj_St.Count > 0)
{
for (int i = 0; i < Obj_St.Count; i++)
{
studentName.Text = Obj_St[i].StudentName;
ddl_Class.SelectedValue = Convert.ToString(Obj_St[i].ClassMasterID);
ddl_Exhibition.SelectedValue = Convert.ToString(Obj_St[i].ExhibitionCoordinatorMasterID);
}
}
}