How to Connect Attendance Punching Machine Using zKemKeeper in C#?

Question

I am developing attendance software using asp.net c#, when iam trying to connect biometric device ( attendance punching machine ) using asp.net c# it shows the error

Error: "Attempted to read or write protected memory. This is often an indication that other memory is corrupt."

My Code :

//internal Axzkemkeeper.AxCZKEM AxCZKEM1;
    //public Axzkemkeeper.AxCZKEM axCZKEM1 = new Axzkemkeeper.AxCZKEM();
    //public zkemkeeper.CZKEM axCZKEM1 = new zkemkeeper.CZKEM();
    //public delegate int DecompressMCX(int hComp,IntPtr in, uint in_len, IntPtr out, ref uint out_len, bool eod);

    public zkemkeeper.CZKEM axCZKEM1 = new zkemkeeper.CZKEM();

private void Essl_Connect(string IpAddress, int MachineNo)
    {
        try
        {
            bConn = axCZKEM1.Connect_Net(IpAddress.Trim(), 8080);
            //bConn = axCZKEM1.Connect_Net(IpAddress.Trim(), 4370);
            if (bConn == true)
            {
                ScriptManager.RegisterStartupScript(this, GetType(), "Message", "alert('Connected')", true);
            }
            else
            {
                ScriptManager.RegisterStartupScript(this, GetType(), "Message", "alert('Not Connected')", true);
            }
        }
        catch (Exception ex)
        {
            ScriptManager.RegisterStartupScript(this, GetType(), "Error Message", "alert('" + ex.Message.ToString() + "')", true);
        }
    }

any one rectify this problem, is there any alternative way to connect the machine?..

if iam using

public zkemkeeper.CZKEMClass axCZKEM1 = new zkemkeeper.CZKEMClass();

it shows the following Error:

"Interop type 'zkemkeeper.CZKEMClass' cannot be embedded. Use the applicable interface instead."

score 3 · Answer 1 · answered Jul 20 '17 at 17:51

3

Change (in properties) of that dll interop.zkemkeeper, embed type to False.

answered Jul 20 '17 at 17:51

Oscar Goicochea

31
2

This is the correct answer for me. It worked like a charm – Alejandro del Río Aug 16 '17 at 08:24

score 0 · Answer 2 · answered Apr 05 '17 at 10:35

0

Make sure regstr correct dll files x64/x32
add this code top of the code where class created

[SecurityPermission(SecurityAction.Assert, Unrestricted = true)]

answered Apr 05 '17 at 10:35

Terlan Abdullayev

327
2
8

score 0 · Answer 3 · answered Jun 24 '21 at 13:51

     public static CZKEM axCZKEM1 = new CZKEM();
    private static bool bIsConnected;
    private static int iMachineNumber;

    public static bool ConnectDevice(string IP,int Port)
    {
        int idwErrorCode=0;
        try
        {
            bIsConnected = axCZKEM1.Connect_Net(IP.Trim(),Port);
            if (bIsConnected)
            {
                iMachineNumber = 1; //In fact,when you are using the tcp/ip communication,this parameter will be ignored,that is any integer will all right.Here we use 1.
                axCZKEM1.EnableDevice(iMachineNumber, false);
                axCZKEM1.RegEvent(iMachineNumber, 65535); //
                return true;
            }
            else
            {
                axCZKEM1.GetLastError(idwErrorCode);
                new Exception($"Error : Unable to connect the device, ErrorCode =  {idwErrorCode}");
                return false;
            }
        }
        catch (Exception ex)
        {

            throw ex;
        }
    }

    public static bool DisconnectDevice()
    {
        try
        {
            axCZKEM1.Disconnect();
            return true;
        }
        catch (Exception ex)
        {

            throw ex;
        }

Please describe your answer @mhmd.tuhami. – Kaveh Jun 24 '21 at 15:07 — Kaveh, Jun 24 '21 at 15:07

score -1 · Answer 4 · edited Jul 20 '17 at 17:55

Connect biometric attendance machine with .NET using C#.NET. Now write the code below on the connect button's click event.

Declare your connection object first:

public zkemkeeper.CZKEM axCZKEM1 = new zkemkeeper.CZKEM();
private void btnconnect_Click(object sender, EventArgs e)
{
    try
    {
        bool bIsConnected = axCZKEM1.Connect_Net(ip_address_of_your_machine, 4370);   // 4370 is port no of attendance machine
        if (bIsConnected == true)
        {
            MessageBox.Show("Device Connected Successfully");
        }
        else
        {
            MessageBox.Show("Device Not Connect");
        }
    }

    Catch( (Exception ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }
}

Download attendance log from biometric attendance machine in the database using C#.NET.

Write the code below on the click event of the download attendance button:

private bool IsRead = false;
string dwEnrollNumber;
int dwVerifyMode, dwInOutMode, dwYear, dwMonth, dwDay, dwHour, dwMinute, dwSecond,           dwWorkcode, dwMachineNumber;
public zkemkeeper.CZKEM axCZKEM1 = new zkemkeeper.CZKEM();

public class ClsMachineBL
{
    public String DownloadDataFromBiomatrix(ClsMachineML prp)
    {
        try
        {
            string constr = CommonConnection.ConStr;
            con = new SqlConnection(constr);
            con.Open();
            cmd = new SqlCommand("Prc_InsertDatafromBiomatrix", con);
            cmd.CommandType = CommandType.StoredProcedure;
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            cmd.Parameters.AddWithValue("@dwMachineNumber", prp.dwMachineNumber);
            cmd.Parameters.AddWithValue("@dwEnrollNumber", prp.dwEnrollNumber);
            cmd.Parameters.AddWithValue("@dwVerifyMode", prp.dwVerifyMode);
            cmd.Parameters.AddWithValue("@dwInOutMode", prp.dwInOutMode);
            cmd.Parameters.AddWithValue("@dwYear", prp.dwYear);
            cmd.Parameters.AddWithValue("@dwMonth", prp.dwMonth);
            cmd.Parameters.AddWithValue("@dwDay", prp.dwDay);
            cmd.Parameters.AddWithValue("@dwHour", prp.dwHour);
            cmd.Parameters.AddWithValue("@dwMinute", prp.dwMinute);
            cmd.Parameters.AddWithValue("@dwSecond", prp.dwSecond);
            cmd.Parameters.AddWithValue("@dwWorkcode", prp.dwWorkcode);
            cmd.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            BL.clsCommon objerr = new BL.clsCommon();
            objerr.InesrtError("Error IS " + ex.Message + "_" + ex.StackTrace);
        }
        finally
        {
            cmd.Dispose();
            con.Close();
            con.Dispose();
        }
        return result;
    }
}

public class ClsMachineML
{
    public string Id { get; set; }
    public string MachineNo { get; set; }
    public string MachineIP { get; set; }
    public string PortNo { get; set; }
    public string Remark { get; set; }
    public string Tuser { get; set; }
    public string Tdate { get; set; }
    public string Status { get; set; }
    public int  dwMachineNumber { get; set; }
    public string dwEnrollNumber { get; set; }
    public int dwVerifyMode { get; set; }
    public int dwInOutMode { get; set; }
    public int dwYear { get; set; }
    public int dwMonth { get; set; }
    public int dwDay { get; set; }
    public int dwHour { get; set; }
    public int dwMinute { get; set; }
    public int dwSecond { get; set; }
    public int dwWorkcode { get; set; }
    public string User_Id { get; set; }
    public string Name { get; set; }
    public int Finger_Index { get; set; }
    public string Finger_Image { get; set; }
    public int Privilege { get; set; }
    public string Passwords { get; set; }
    public bool Enabled { get; set; }
    public int Flag { get; set; }
    public string  Fromdate { get; set; }
    public string Todate { get; set; }
}

private void btndownload_Click(object sender, EventArgs e)
{
     ClsMachineBL obj = new ClsMachineBL();
     ClsMachineML prp = new ClsMachineML();

    try
    {
        if (cbmachine.Text == "" || cbmachine.Text == "Select")
        {
            MessageBox.Show("Please Select Machine");
            cbmachine.Focus();
            return;
        }

        progressBar1.Visible = true;
          bool bIsConnected = axCZKEM1.Connect_Net(ip_address_of_your_machine, 4370);   // 4370 is port no of attendance machine
        if (bIsConnected == true)
        {
            IsRead = axCZKEM1.ReadGeneralLogData(dwMachineNumber);
            if (IsRead == true)
            {
                progressBar1.Maximum = 100;
                progressBar1.Step = 1;
                progressBar1.Value = 0;
                while (axCZKEM1.SSR_GetGeneralLogData(dwMachineNumber, out dwEnrollNumber, out dwVerifyMode, out dwInOutMode, out dwYear, out                                dwMonth, out dwDay, out dwHour, out dwMinute, out dwSecond, ref dwWorkcode))
                {
                    prp.dwDay = dwDay;
                    prp.dwEnrollNumber = dwEnrollNumber;
                    prp.dwHour = dwHour;
                    prp.dwInOutMode = dwInOutMode;
                    prp.dwMachineNumber = dwMachineNumber;
                    prp.dwMinute = dwMinute;
                    prp.dwMonth = dwMonth;
                    prp.dwSecond = dwSecond;
                    prp.dwVerifyMode = dwVerifyMode;
                    prp.dwWorkcode = dwWorkcode;
                    prp.dwYear = dwYear;
                    string add = obj.DownloadDataFromBiomatrix(prp);
                    progressBar1.PerformStep();
                }

                string export = obj.ExportToAttendance(prp);
                MessageBox.Show("Attendance Downloaded Successfully");
                progressBar1.Visible = false;
            }
            else
            {
                MessageBox.Show("No Log Found....");
                progressBar1.Visible = false;
            }
        }
        else
        {
            MessageBox.Show("Device Not Connected");
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message.ToString());
    }
}

Delete the attendance log from biometric attendance machine in the database using C#.NET.

public zkemkeeper.CZKEM axCZKEM1 = new zkemkeeper.CZKEM();
private void btndownload_Click(object sender, EventArgs e)
{
    bool bIsConnected = axCZKEM1.Connect_Net(ip_address_of_your_machine, 4370);   // 4370 is port no of attendance machine
    if (bIsConnected == true)
    {
        bool delete = axCZKEM1.ClearGLog(dwMachineNumber);
        if (delete == true)
        {
            MessageBox.Show("Deleted.....");
        }
        if (delete == false)
        {
            MessageBox.Show("No Log Found To Delete.....");
        }
    }
}

I don't think `Catch( (Exception ex)` in your first code segment is syntactically correct. — Pang, Aug 02 '16 at 08:15
thanks... could you please the code for the procedure Prc_InsertDatafromBiomatrix ? — Salem Ahmed, Nov 25 '21 at 09:03

How to Connect Attendance Punching Machine Using zKemKeeper in C#?

4 Answers4