protected void ccmbBookseller_BeforeDataBind(object sender, EventArgs e)
 {
     using (BooksellerApplClient app = new BooksellerApplClient())
     {
         ccmbBookseller.DataSource = app.GetBooksellers();
     }
 }
 protected void ccmbBookseller_BeforeDataBind(object sender, EventArgs e)
 {
     using (BooksellerApplClient app = new BooksellerApplClient())
     {
         ccmbBookseller.DataSource = app.GetBooksellers();
     }
 }