/// <summary>
///Actual claim method task that claims and enables printer instance 2 asynchronously. It then adds the releasedevicerequested event handler as well to the claimed printer.
/// </summary>
private async Task <bool> ClaimAndEnablePrinter2()
{
if (printerInstance2 == null)
{
rootPage.NotifyUser("Cound not claim printer. Make sure you find printer first.", NotifyType.ErrorMessage);
return(false);
}
if (printerInstance1 != null && claimedPrinter2 == null)
{
rootPage.NotifyUser("Trying to claim instance 2.", NotifyType.StatusMessage);
claimedPrinter2 = await printerInstance2.ClaimPrinterAsync();
if (claimedPrinter2 != null)
{
claimedPrinter2.ReleaseDeviceRequested += ClaimedPrinter2_ReleaseDeviceRequested;
rootPage.NotifyUser("Claimed Printer Instance 2", NotifyType.StatusMessage);
if (!await claimedPrinter2.EnableAsync())
{
rootPage.NotifyUser("Could not enable printer instance 2.", NotifyType.ErrorMessage);
}
else
{
return(true);
}
}
else
{
rootPage.NotifyUser("Claim Printer instance 2 failed. Probably because instance 1 is holding on to it.", NotifyType.ErrorMessage);
}
}
return(false);
}
/// <summary>
/// Actual claim method task that claims the printer asynchronously
/// </summary>
private async Task <bool> ClaimPrinter()
{
if (claimedPrinter == null)
{
claimedPrinter = await printer.ClaimPrinterAsync();
if (claimedPrinter != null)
{
rootPage.NotifyUser("Claimed Printer", NotifyType.StatusMessage);
}
else
{
rootPage.NotifyUser("Claim Printer failed", NotifyType.ErrorMessage);
return(false);
}
}
return(true);
}