Question

我使用第三方dll集成zteco生物识别设备。我通过使用TlbImp.exe并复制它来添加zkemkeeper.dll。

这是我的主要代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace RTEvents
{
    public partial class Main : Form
    {
        public Main()
        {
            InitializeComponent();
        }


        private void connectionToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Connectivity con = new Connectivity();
            con.MdiParent = this;
            con.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            con.ControlBox = false;
            con.MaximizeBox = false;
            con.MinimizeBox = false;

            con.Text = "";
            con.Dock = DockStyle.Fill;
            con.Show();
        }

        private void Main_Load(object sender, EventArgs e)
        {
            try
            {
                IsMdiContainer = true;
                WindowState = FormWindowState.Normal;
                this.toolStripStatusLabel1.Text = "Checking device status...";

                new Thread(() =>
                {
                    Thread.CurrentThread.IsBackground = true;
                    Connection con = new Connection();
                    RealTimeEvents rt = new RealTimeEvents();
                    if (con.CheckConnectivity(Connection.axCZKEM1))
                    {
                        this.toolStripStatusLabel1.Text = "Device connected";

                        con.DeviceProcess(rt);
                    }
                    else
                    {
                        this.toolStripStatusLabel1.Text = "Device not connected";
                    }
                }).Start();

            }
            catch { }
        }

        public void setStatusLabel(string text)
        {
            this.toolStripStatusLabel1.Text = text;
        }


    }
}

我的连接类

using System;

使用System.Collections.Generic; 使用System.Text;

命名空间RTEvents { 类连接 { public static string IP =＆＃34; 192.168.1.3＆＃34 ;; public static string PORT =＆＃34; 4370＆＃34 ;; 公共静态字符串MACHINE_NUMBER =＆＃34; 1＆＃34 ;; 公共静态字符串MASK =＆＃34; 65535＆＃34 ;; public static zkemkeeper.CZKEMClass axCZKEM1 = new zkemkeeper.CZKEMClass（）; public static bool isConnected = false; public void DeviceProcess（RealTimeEvents rt） {

        if (Connection.axCZKEM1.RegEvent(Convert.ToInt32(MACHINE_NUMBER), Convert.ToInt32(MASK)))//Here you can register the realtime events that you want to be triggered(the parameters 65535 means registering all)
        {
            Connection.axCZKEM1.OnFinger += new zkemkeeper._IZKEMEvents_OnFingerEventHandler(rt.axCZKEM1_OnFinger);
            Connection.axCZKEM1.OnVerify += new zkemkeeper._IZKEMEvents_OnVerifyEventHandler(rt.axCZKEM1_OnVerify);
            Connection.axCZKEM1.OnAttTransactionEx += new zkemkeeper._IZKEMEvents_OnAttTransactionExEventHandler(rt.axCZKEM1_OnAttTransactionEx);
            Connection.axCZKEM1.OnFingerFeature += new zkemkeeper._IZKEMEvents_OnFingerFeatureEventHandler(rt.axCZKEM1_OnFingerFeature);
            Connection.axCZKEM1.OnEnrollFingerEx += new zkemkeeper._IZKEMEvents_OnEnrollFingerExEventHandler(rt.axCZKEM1_OnEnrollFingerEx);
            Connection.axCZKEM1.OnDeleteTemplate += new zkemkeeper._IZKEMEvents_OnDeleteTemplateEventHandler(rt.axCZKEM1_OnDeleteTemplate);
            Connection.axCZKEM1.OnNewUser += new zkemkeeper._IZKEMEvents_OnNewUserEventHandler(rt.axCZKEM1_OnNewUser);
            Connection.axCZKEM1.OnHIDNum += new zkemkeeper._IZKEMEvents_OnHIDNumEventHandler(rt.axCZKEM1_OnHIDNum);
            Connection.axCZKEM1.OnAlarm += new zkemkeeper._IZKEMEvents_OnAlarmEventHandler(rt.axCZKEM1_OnAlarm);
            Connection.axCZKEM1.OnDoor += new zkemkeeper._IZKEMEvents_OnDoorEventHandler(rt.axCZKEM1_OnDoor);
            Connection.axCZKEM1.OnWriteCard += new zkemkeeper._IZKEMEvents_OnWriteCardEventHandler(rt.axCZKEM1_OnWriteCard);
            Connection.axCZKEM1.OnEmptyCard += new zkemkeeper._IZKEMEvents_OnEmptyCardEventHandler(rt.axCZKEM1_OnEmptyCard);
            Connection.isConnected = true;
        }
    }
    public void UnProcessDevice(RealTimeEvents rt)
    {
        Connection.axCZKEM1.Disconnect();
        Connection.axCZKEM1.OnFinger -= new zkemkeeper._IZKEMEvents_OnFingerEventHandler(rt.axCZKEM1_OnFinger);
        Connection.axCZKEM1.OnVerify -= new zkemkeeper._IZKEMEvents_OnVerifyEventHandler(rt.axCZKEM1_OnVerify);
        Connection.axCZKEM1.OnAttTransactionEx -= new zkemkeeper._IZKEMEvents_OnAttTransactionExEventHandler(rt.axCZKEM1_OnAttTransactionEx);
        Connection.axCZKEM1.OnFingerFeature -= new zkemkeeper._IZKEMEvents_OnFingerFeatureEventHandler(rt.axCZKEM1_OnFingerFeature);
        Connection.axCZKEM1.OnEnrollFingerEx -= new zkemkeeper._IZKEMEvents_OnEnrollFingerExEventHandler(rt.axCZKEM1_OnEnrollFingerEx);
        Connection.axCZKEM1.OnDeleteTemplate -= new zkemkeeper._IZKEMEvents_OnDeleteTemplateEventHandler(rt.axCZKEM1_OnDeleteTemplate);
        Connection.axCZKEM1.OnNewUser -= new zkemkeeper._IZKEMEvents_OnNewUserEventHandler(rt.axCZKEM1_OnNewUser);
        Connection.axCZKEM1.OnHIDNum -= new zkemkeeper._IZKEMEvents_OnHIDNumEventHandler(rt.axCZKEM1_OnHIDNum);
        Connection.axCZKEM1.OnAlarm -= new zkemkeeper._IZKEMEvents_OnAlarmEventHandler(rt.axCZKEM1_OnAlarm);
        Connection.axCZKEM1.OnDoor -= new zkemkeeper._IZKEMEvents_OnDoorEventHandler(rt.axCZKEM1_OnDoor);
        Connection.axCZKEM1.OnWriteCard -= new zkemkeeper._IZKEMEvents_OnWriteCardEventHandler(rt.axCZKEM1_OnWriteCard);
        Connection.axCZKEM1.OnEmptyCard -= new zkemkeeper._IZKEMEvents_OnEmptyCardEventHandler(rt.axCZKEM1_OnEmptyCard);
        Connection.isConnected = false;
    }
    public bool CheckConnectivity(zkemkeeper.CZKEMClass axCZKEM1)
    {
        if (isConnected == false)
        {

            if (axCZKEM1.Connect_Net(IP, Convert.ToInt32(PORT)))
            {

                isConnected = true;
                return isConnected;
            }
            else
            {
                return false;
            }
        }
        return false;
    }
}

}

这是错误，我不知道如何解决它 Thats the error

Answer 1

构造类时抛出此类异常，无法分配特定的静态属性。

请参阅MDSN中的文档;

https://msdn.microsoft.com/en-us/library/system.typeinitializationexception(v=vs.110).aspx#Static

在你的班上，你有;

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

尝试删除它（用于调试目的）并查看是否仍然抛出异常。如果不是，那么你知道这就是问题所在。至于潜在的问题，我们需要更多关于这个zkemkeeper dll的信息。

类型为＃System; TypeInitializationException＆＃39;的未处理异常发生在RTEvents.exe

1 个答案: