Using Zkemkeeper dll from SDK for Biometric scanner in Windows Service

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Hi Team,

I have purchased your SDK for biometric scanner from a dealer from India.

I am using zkemkeeper.dll, while interfacing Biometric scanner with C# code.

I am using the handler OnAttTransactionExEventHandler for getting the update when a finger is pressed on the terminal. This works fine when interacting with code written in Windows Forms.

Issue:

When I am using this same event handler, with Windows Service written with C# code.
The handler does not work, i.e. when finger is pressed on the Biometric terminal the handler method does not get fired.
I am also using regEvent(deviceid,1) for all OnAttTransaction/OnAttTransactionEx and also used regEvent(deviceid,65532) for registering all events, but still same problem.
I have written the whole code in OnStart(), biometric machine also gets connected, but handler is not firing up.

Needed Working:

I have created a windows service, which will be started on a windows 7 64-bit machine.
I have used Biometric scanner with SDK 6.0.3.3 and zkemkeeper.dll version 2.0.0.1. When user places the finger on scanner, OnAttTransactionExEventHandler must fire to perform the action written in this method.

Please help me out as am stuck for this issue.

Thanks in advance,
Nitesh

Posted 17-Jan-14 1:06am

Neetesh_Ch

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jose raymundo aviles rios 20-Jul-17 14:01pm

can you teach me hot to works?

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Achmad Mulyadi · Answer 1 · 2015-08-27T09:19:00

Try this:

C#

myCZKEMClass = new CZKEMClass();

Thread createComAndMessagePumpThread = new Thread(() =>
{
    myCZKEMClass.Connect_Net("192.168.1.20", 4370);


    if (myCZKEMClass.RegEvent(1, 65535))
    {
        myCZKEMClass.OnAttTransactionEx += new _IZKEMEvents_OnAttTransactionExEventHandler(myCZKEMClass_OnAttTransactionEx);
    }

    Application.Run();
});
createComAndMessagePumpThread.SetApartmentState(ApartmentState.STA);

createComAndMessagePumpThread.Start();

eventLog1.WriteEntry("Service Started");

Put the code inside Start method of the service. You need to add a reference to System.Windows.Form library.
But this SDK seems have another problem, the event will stop working after couple mins if you let the service idle (same thing happened to WinForms too). I'm not sure if it's only me who had this problem, but the code samples gave me same result.