public async void PrintCommand(string printerName, string printText)
{
try
{
await _blueToothService.Print(printerName, printText);
}
catch (Exception ex)
{
}
}
public void Imprimir(string Men)
{
blueToothService.Print(SelectedDevice, Men);
}
/// <summary>
/// Print text-message
/// </summary>
public Task Print()
{
return(_blueToothService.Print(SelectedDevice, PrintMessage));
}
async void OnListViewItemSelected(object sender, SelectedItemChangedEventArgs e)
{
if (e.SelectedItem != null)
{
var action = DisplayAlert("Edit Order ", "ต้องการชำระเงินรายการนี้", "Yes", "No");
if (await action)
{
ListView listView = (ListView)sender;
FoodMini mini = (FoodMini)listView.SelectedItem;
List <FoodMini> listFood1 = await firebaseHelper.GetAllFood(date_str, mini.QuequNo, "P");
decimal totalAmount = 0;
StringBuilder sb = new StringBuilder();
sb.Append("--------------r\n");
for (int i = 0; i < listFood1.Count; i++)
{
FoodMini mini2 = listFood1[i];
mini2.Status = "Y";
await firebaseHelper.UpdateFood(mini2.ID, mini2.Name, mini2.NameEn, mini2.Location, mini2.Details, mini2.Quantity, mini2.OrderDate, mini2.QuequNo, mini2.Status, date_str, mini2.LevelSpicy);
sb.Append(" Order No = " + (i + 1) + "r\n");
sb.Append(" Food = " + mini2.Name + "r\n");
sb.Append(" จำนวน = " + mini2.Quantity + "r\n");
sb.Append(" ราคา = " + mini2.CostPerUnit + "r\n");
totalAmount = totalAmount + (mini2.CostPerUnit * mini2.Quantity);
}
sb.Append("-------------");
sb.Append("รวมราคา " + totalAmount);
sb.Append("\r\n ");
sb.Append("\r\n ");
sb.Append("-------------");
sb.Append("Order By " + Application.Current.Properties["UserLogin"] + "");
sb.Append("\r\n ");
sb.Append("\r\n ");
sb.Append("\r\n ");
totalAmount = 0;
decimal totalQuan = 0;
for (int i = 0; i < listFood1.Count; i++)
{
FoodMini mini2 = listFood1[i];
sb.Append(" Order No = " + (i + 1) + "r\n");
sb.Append(" Food = " + mini2.Name + "r\n");
sb.Append(" จำนวน = " + mini2.Quantity + "r\n");
sb.Append(" ราคา = " + mini2.CostPerUnit + "r\n");
totalAmount = totalAmount + (mini2.CostPerUnit * mini2.Quantity);
totalQuan = totalQuan + mini2.Quantity;
}
sb.Append("-------------");
sb.Append("รวมราคา " + totalAmount);
sb.Append("\r\n ");
sb.Append("\r\n ");
sb.Append("-------------");
sb.Append("Order By " + Application.Current.Properties["UserLogin"] + "");
sb.Append("\r\n ");
sb.Append("\r\n ");
sb.Append("\r\n ");
message = sb.ToString();
await _blueToothService.Print(SelectedDevice, message);
} //end if
} //end if
}
public PrintSettingPageViewModel(INavigationService navigationService,
IDialogService dialogService
) : base(navigationService, dialogService)
{
_blueToothService = DependencyService.Get <IBlueToothService>();
Title = "蓝牙打印机";
this.PrintData = null;
this.EnableBluetooth = Settings.EnableBluetooth;
this.WhenAnyValue(x => x.PrintStyleSelected).Subscribe(x => { Settings.PrintStyleSelected = x; })
.DisposeWith(this.DeactivateWith);
//启用蓝牙
this.WhenAnyValue(x => x.EnableBluetooth)
.Subscribe(async x =>
{
try
{
if (x)
{
this.Drives.Clear();
Settings.EnableBluetooth = true;
var micAccessGranted = await _blueToothService.GetPermissionsAsync();
if (!micAccessGranted)
{
this.EnableBluetooth = false;
this.Alert("请打先启用手机蓝牙功能");
return;
}
Device.BeginInvokeOnMainThread(async() =>
{
using (var dig = UserDialogs.Instance.Loading("扫描中..."))
{
long timeOutTime = 8000;
long curRunTime = (long)(DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalMilliseconds;
long tempTime = curRunTime;
while (this.Drives.Count == 0 && (curRunTime - tempTime) <= timeOutTime)
{
curRunTime = (long)(DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalMilliseconds;
var results = _blueToothService.PairedDevices();
if (results != null && results.Any())
{
this.DrivesHeight = results.Count() * 40.7;
this.Drives = new ObservableRangeCollection <Printer>(results);
}
await Task.Delay(1000);
}
}
if (this.Drives.Count == 0)
{
_dialogService.LongAlert("没有扫描蓝牙到设备！");
this.EnableBluetooth = false;
Settings.EnableBluetooth = false;
}
});
}
else
{
Settings.EnableBluetooth = false;
this.EnableBluetooth = false;
this.Drives.Clear();
}
}
catch (NullReferenceException)
{
this.EnableBluetooth = false;
Settings.EnableBluetooth = false;
_dialogService.LongAlert("没有找到蓝牙设备！");
}
})
.DisposeWith(this.DeactivateWith);
//适配
this.AdaptationCmd = ReactiveCommand.CreateFromTask <Printer>(async(item) =>
{
if (!item.Status && Drives != null && Drives.Where(s => s.Status).Count() > 0)
{
_dialogService.LongAlert("请先断开当前适配");
return;
}
using (var dig = UserDialogs.Instance.Loading("请稍等..."))
{
try
{
await Task.Delay(500);
await Task.Run(() =>
{
Device.BeginInvokeOnMainThread(async() =>
{
if (!item.Status)
{
var connected = await _blueToothService.ConnectDevice(item);
if (connected)
{
item.Status = true;
}
}
else
{
_blueToothService.PrintStop();
App.BtAddress = "";
item.Status = false;
}
});
});
}
catch (Exception)
{
_dialogService.LongAlert("适配不到设备，请确保打印机开启");
}
}
});
//打印测试
this.PrintCommand = ReactiveCommand.Create(() =>
{
try
{
if (!string.IsNullOrEmpty(App.BtAddress))
{
_blueToothService.Print(this.PrintData, Settings.PrintStyleSelected, this.RepeatPrintNum);
}
else
{
_dialogService.LongAlert("请选择匹配设备！");
}
}
catch (Exception ex)
{
_dialogService.LongAlert(ex.Message);
}
});
}