private void bt_Tim_Click(object sender, EventArgs e)
{
if (tb_giatu.Text != ""&&tb_giaden.Text!="")
{
lv_dsketqua.Items.Clear();
client = new ServiceReference1.Service1Client();
client.TimgiaCompleted += new EventHandler<ServiceReference1.TimgiaCompletedEventArgs>(TimgiaCallBack);
client.TimgiaAsync(int.Parse(tb_giatu.Text),int.Parse(tb_giaden.Text));
}
else
{
lv_dsketqua.Items.Clear();
client = new ServiceReference1.Service1Client();
client.LoadNHCFCompleted += new EventHandler<ServiceReference1.LoadNHCFCompletedEventArgs>(LoadNHCFCallBack);
client.LoadNHCFAsync();
}
}