WP 8.1 application can't print on Windows 10 Mobile - c#

Hello I have a application which is for Windows Phone 8.1 and it's working fine but when i try to install the app on Windows 10 Mobile everything is fine expect the module for bluetooth printing. It's not printing at all. So my question is how i can make the app to print on Windows 10 Mobile device?

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Windows Ink in Windows 10 Mobile

Can use Windows Ink on Windows 10 Mobile? Can I published an uwp app with Windows Ink for Windows 10 Mobile?
Or Windows Ink only Works in Windows 10 Desktop?
Can use Windows Ink on Windows 10 Mobile?
If you mean you are using the InkCanvas control in a UWP app, and you want to know if the InkCanvas can work when running this UWP app on a Windows 10 mobile device, in that case, the short answer should be yes. InkCanvas is not only work for desktop devices.
But pay attention that you must specify support for other devices through the InputDeviceTypes of an InkPresenter object. For mobile you may need to add the Touch device type.
Can I published an uwp app with Windows Ink for Windows 10 Mobile
You could publish it to windows store, and install it in your mobile. There is no special capabilities needed for this control.

Directly reading sensor data by paring Band 2 and PC (windows 8.1) still needs an emulator

I have to read sensor data from Band. I did search and became more confused. It seems there is a way to directly read data from Band by connecting with the desktop (windows 8.1) via Bluetooth. When I run a sample, it returns an error message like ‘deployment failure. No windows phone is detected’.
Is it possible to read sensor data from Band 2 this way?
Software environment: VS2015 community-Blank App (Universal windows);
Hardware environment: Band 2, desktop;
Pairing Band 2 with desktop via Bluetooth;
No windows phone and windows phone emulator get involved. Microsoft Health app is not used.
If yes, can I find sample code online?
Or it should be this way?
Software environment: VS2015 community-Blank App (Universal Windows 8.1), windows phone emulator, Hyper-V is required as well;
Hardware environment: Band 2, desktop, windows phone;
Pairing Band 2 with windows phone via Bluetooth;
Run the sample on the windows phone;
Both windows phone and windows phone emulator get involved.Microsoft Health app is not used.
You can use the Band SDK in one of two ways:
Within a Windows Phone 8.1 or 10 (Universal) application running on a Windows Phone, where the Band is Bluetooth-paired to the phone.
Within a Windows Store 8.1 or 10 (Universal) application running on a Windows PC, where the Band is Bluetooth-paired to the PC.
The Band SDK is the same regardless of the hardware used, so any of the samples should be fine.
Note that you cannot use the Band SDK when your application is running in the Windows Phone emulator nor when the application is running in the Windows simulator.

How to Hide App from Recent App list UWP Windows 10 Mobile?

How to Hide screen App from Recent App list UWP Windows 10 Mobile?

Retarget Windows Phone 8 app to Windows Phone 10

As many of you may know, Microsoft will be releasing the new Windows Phone 10 operating system to current Windows Phone 8.1 users.
I was wondering whether it will be possible to retarget Windows Phone 8/8.1 apps to Windows Phone 10 and if so how.
I couldn't really find any information on this so I will greatly appreciate any information on how to do this.
PS. My app is written in C# and XAML.
I think it is too early to speak about the way WP 8 application migration to WP 10.
Work on WP 10 still actively underway and many changes occur in operating system (see Windows Insider).
Exactly, we can say that all the applications created by template WP 8.1 (RT, but not SilverLigth 8.1) will work on WP 10.
I've tried a few of their applications WP 8.1 for Windows Phone 10 (Insider) and have not noticed problems.

applications for multiple environment (windows phone 8, windows phone 8.1, windows 8, windows 7, windows xp)

I have a request for simple application containing few views, no business logic, communication with REST services. The problem lies on multiple environments:
1. windows phone 8
2. windows phone 8.1
3. windows 8
4. windows 7
5. windows xp
I am concerning WPF application for Windows 8 and and Windows 7, Windows Phone 8 application for Phone 8 and Phone 8.1, for XP (i know it is not supported) separate application.
Do I miss something or there is hidden pitfall ?
It is possible to generalize desktop application for Windows 8, 7 and XP ?
Thanks in advance
EDIT:
Finally with help I have solution that fills requirements:
1. For Win Phone 8.1 and 8.0 Windows Phone 8.0 application, as it will work on both systems
2. For Win 8 and Win 7, WPF application
3. For Win XP dedicated application
Looks like a lot of work...
Edit: As a webapplication is not allowed/possible I'll update my answer but leave the original answer below
If you can install WPF and .NET on Windows XP you may use WPF as Desktop solution.
For Windows Phone you can create a WP8 version. This will then run on WP8, 8.1 and 7.8
Please mind that Windows Phone 8 only supports a subset of WPF so if you like to reuse some XAML you have to consider that and start with Phone.
The codebehind (REST communication) will be C# in both cases.
Original answer:
You may create a web application/site.
On Windows Phone you can then create an app which just uses a browser control. It can be distributed in store installed and it's still a website.
On desktop you can either just use the browser or create a winforms app with a browser component.

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