下面是我的Windows服务代码。当我调试代码时,我得到错误/异常:

CSMessageUtility的类型初始化式。CSDetails抛出了一个异常。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.IO;
using System.Threading;
using System.Windows;
using System.Windows.Forms;
using CSMessageUtility;

namespace CS_Data_Trasmmiting_Service
{
    public partial class svcCSWinServ : ServiceBase
    {
        //private string sLogFormat;
        //private string sErrorTime;
        private Thread new_thread;
        Logger logObject = new Logger();
        private bool isenable = true;

        public svcCSWinServ()
        {
            InitializeComponent();
            logObject.append("Initialize Service " + DateTime.Now.ToString(), 70);
            CheckForAlarms();
        }

        protected override void OnStart(string[] args)
        {
            try
            {
                new_thread = new Thread(new ThreadStart(CheckForAlarms));
                new_thread.Start();
            }
            catch
            {
            }

            logObject.append("Service Started successfully " + DateTime.Now.ToString(), 70);
        }

        protected override void OnStop()
        {
            try
            {
                isenable = false;
                new_thread.Abort();
            }
            catch
            {

            }
            logObject.append("Service Stopped successfully " + DateTime.Now.ToString(), 70);
        }


        void CheckForAlarms()
        {
            try
            {
                while (true)
                {
                    //if((DateTime.Now.ToString("HH:mm") == "18:00"))
                    //{

                        logObject.append("Start Sending Data " +DateTime.Now.ToString(), 70);
                        try
                        {
                            //SendAllInfo();
                            string str = CSMessageUtility.CSDetails.createDHSMessageFormat();
                            Thread.Sleep(2000);
                            string str1 = CSMessageUtility.CSDetails.createEALMessageFormat();
                            Thread.Sleep(2000);
                            string str2 = CSMessageUtility.CSDetails.createProductStatusMessageForamt();
                            Thread.Sleep(2000);
                            string str3 = CSMessageUtility.CSDetails.createEODMessageFormat();
                            Thread.Sleep(2000);
                            string str4 = CSDetails.createProductReceiptEntryatBOSMessageFormat();
                            Thread.Sleep(2000);
                            string str5 = CSMessageUtility.CSDetails.createProductSaleMessageFormat();
                            Thread.Sleep(2000);
                            string str6 = CSMessageUtility.CSDetails.createTotalizerExceptionMessageFormat();
                            Thread.Sleep(2000);
                            //CSMessageUtility.CSDetails.createDailyCOtransferMessageFormat();
                            //Thread.Sleep(2000);

                        }
                        catch (Exception ee)
                        {
                            logObject.append(ee.Message, 70);
                        }
                        logObject.append("Finished Sending Data " +DateTime.Now.ToString(), 70);
                        Thread.Sleep(3000);
                    //}
                    //Thread.Sleep(20000);
                }
            }
            catch (Exception ex)
            {
                logObject.append("Thread Exception: "+ ex.Message + " "+ DateTime.Now.ToString(), 70);

                try
                {
                    new_thread.Abort();
                }
                catch (Exception ex1)
                {
                    logObject.append("Thread Exception: " +ex1.Message + " " + DateTime.Now.ToString(), 70);
                }

                if (isenable == true)
                {
                    new_thread = new Thread(new ThreadStart(CheckForAlarms));
                    new_thread.Start();
                }
            }
        }
    }
}

当前回答

当我在Util类中使用静态方法时,我遇到了同样的问题,就像您使用CSMessageUtility.CSDetails一样。

问题是在类的静态初始化过程中(使用静态构造函数),框架也初始化了类中的静态变量(字段)。我有一个静态变量,试图从app.config读取值,app.config缺少相应的设置,从而导致一个未处理的异常。这导致了

"对象引用未设置为对象的实例。"

作为内部异常。

其他回答

如果一个类试图在web中获取一个键的值,就会导致这个问题。Config或app。Config,这里没有。

如。 该类有一个静态变量

private static string ClientID = System.Configuration.ConfigurationSettings.AppSettings["GoogleCalendarApplicationClientID"].ToString();

但是网络。config不包含GoogleCalendarApplicationClientID键

该错误将在任何静态函数调用或任何类实例创建时抛出

检查TypeInitializationException的InnerException属性;它可能包含有关潜在问题的信息,以及问题发生的确切位置。

退出Visual Studio并重新打开它为我解决了这个问题。

我在try-catch块中包装了即将崩溃的行,打印出异常,并在打印后立即中断。所显示的异常信息具有堆栈跟踪,它将我指向导致故障发生的文件和代码行。

System.TypeInitializationException: The type initializer for 'Blah.blah.blah' threw an exception. 
---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Some.Faulty.Software..cctor() in C:\Projects\My.Faulty.File.cs:line 56
   --- End of inner exception stack trace ---
   at Blah.blah.blah(Blah.blah.blah)
   at TestApplication.Program.Main(String[] args) 
   in C:\Projects\Blah.blah.blah\Program.cs:line 29 Exception caught.

如果由于任何原因断电或Visual Studio IDE崩溃,它会在你的bin/debug bin/release中导致这个问题…

只需删除内容并重新编译(从我的个人经验来看,当我的脚趾碰到复位按钮!)