How to open RJ11 cash drawer in wpf c# using .net 7 framework?

Question

			public static PosExplorer posExplorer = new PosExplorer();
 			DeviceCollection deviceCollection = Global.posExplorer.GetDevices("CashDrawer");
            CashDrawer cashDrawer;

            foreach (DeviceInfo deviceInfo in deviceCollection)
            {
                cashDrawer = Global.posExplorer.CreateInstance(deviceInfo) as CashDrawer;
                cashDrawer.Open();
                cashDrawer.Claim(1000);
                cashDrawer.DeviceEnabled = true;
                cashDrawer.OpenDrawer();
                cashDrawer.DeviceEnabled = false;
                cashDrawer.Release();
                cashDrawer.Close();
            }

I need to open a cash drawer in my WPF application, and I have used POSforDotNet V1.14.1 and it is working fine, but it is only supported in the.net 4.5 framework. My application is currently being used in .net 7. How can I achieve it with different library?

Answer 1

hey try this code but first make sure your cash drawer connects through a USB port, serial (COM) port.

using System.IO.Ports;

// ...

private void OpenCashDrawer(string comPort)
{
    try
    {
        SerialPort serialPort = new SerialPort(comPort, 9600); // Adjust if needed
        serialPort.Open();
        serialPort.Write("\x07"); // This tells the drawer to open
        serialPort.Close();
    }
    catch (Exception ex)
    {
        // Handle any issues that might come up
    }
}

Answer 2

You can use CashDrawer Class

with the package Microsoft.Windows.CsWinRT

In Project file,

Change TargetFramework with a recent Windows 10 SDK version (that you must have installed), like

<TargetFramework>net7.0-windows10.0.20348.0</TargetFramework>

and add the Namespaces you want to use, like :

<PropertyGroup>	
	<CsWinRTIncludes>Windows.Devices.PointOfService;Windows.Devices.Enumeration</CsWinRTIncludes>	
</PropertyGroup>