private void btnCancel_Click(object sender, System.EventArgs e)
 {
     try
     {
         if (this.ultraGrid1.ActiveRow.Cells["状态"].Value.ToString() != "预留")
         {
             throw new BusinessException("展位预订设置", "此展位不在预留状态,无法取消预留!");
         }
         ShowSeat seat = new ShowSeat();
         seat.cnnJobID = int.Parse(cmbShow.SelectedItem.DataValue.ToString());
         seat.cnvcSeat = this.ultraGrid1.ActiveRow.Cells["展位"].Value.ToString();
         JobManage jobManage = new JobManage();
         jobManage.CancelLeaveSeat(seat);
         BindSeat();
         MessageBox.Show(this, "展位预留成功!", "展位预订设置", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
     catch (BusinessException bex)
     {
         MessageBox.Show(this, bex.Message, bex.Type, MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
     catch (System.Exception ex)
     {
         MessageBox.Show(this, ex.Message, "系统错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
 }