安装的Windows服务将无法启动

Question

好吧，我讨厌被打扰，但这次是我。 我能够将服务安装得很好，因此效果很好。 当我启动该服务时，它停止了，并且我没有任何问题的详细信息。 所以这是我的代码：

using System;
using System.Configuration;
using System.Data;
using System.Data.Common;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.IO;
using System.ServiceProcess;
using System.Text.RegularExpressions;
using System.Threading;

namespace MyServiceImport
{

public partial class MyServiceData : ServiceBase
{
    private System.Timers.Timer _timer;
    private Double ReadTime = Convert.ToDouble(ConfigurationManager.AppSettings.Get("ReadTime")) * 1000 * 60;
    private DateTime _lastRun = DateTime.Now;
    Thread _thread;

    public MyServiceData()
    {
        InitializeComponent();
    }

    // These lines run when the service starts up
    protected override void OnStart(string[] args)
    {
        _timer = new System.Timers.Timer();
        _timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_Elapsed);
        _timer.Enabled = true;
        _timer.Interval = ReadTime;
        _timer.Start();

        #region Write to Audit Log
        string Event = "Update Service";
        string DoneBy = "Automation User";
        string Information = "Update Service has Started.";
        string MyTimeStamp = DateTime.Now.ToString();

        SqlConnection conn = new SqlConnection(DBUtils.MyService_DBString);
        string writeit = "INSERT INTO MyService_Activities (Event, DoneBy, Information, TimeStamp) values(@Event, @DoneBy, @Information, @TimeStamp)";
        SqlCommand WriteLog = new SqlCommand(writeit, conn);
        conn.Open();
        WriteLog.Parameters.AddWithValue("Event", Event);
        WriteLog.Parameters.AddWithValue("DoneBy", DoneBy);
        WriteLog.Parameters.AddWithValue("Information", Information);
        WriteLog.Parameters.AddWithValue("TimeStamp", MyTimeStamp);
        WriteLog.ExecuteNonQuery();
        conn.Close();
        #endregion

    }

    // writes message into the activity log that the service has stopped.
    protected override void OnStop()
    {
        #region Write to Audit Log
        string Event = "Update Service";
        string DoneBy = "Automation User";
        string Information = "Update Service has Stopped.";
        string MyTimeStamp = DateTime.Now.ToString();

        SqlConnection conn = new SqlConnection(DBUtils.MyService_DBString);
        string writeit = "INSERT INTO MyService_Activities (Event, DoneBy, Information, TimeStamp) values(@Event, @DoneBy, @Information, @TimeStamp)";
        SqlCommand WriteLog = new SqlCommand(writeit, conn);
        conn.Open();
        WriteLog.Parameters.AddWithValue("Event", Event);
        WriteLog.Parameters.AddWithValue("DoneBy", DoneBy);
        WriteLog.Parameters.AddWithValue("Information", Information);
        WriteLog.Parameters.AddWithValue("TimeStamp", MyTimeStamp);
        WriteLog.ExecuteNonQuery();
        conn.Close();
        #endregion
    }

    void timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
    {
        // set up connection string 
        string _csMyServiceDD = DBUtils.MyService_DBString;
        string DoImportNow = string.Empty, TaskDay = string.Empty, TaskStartTime = string.Empty, TaskEndTime = string.Empty;

        SqlConnection conn = new SqlConnection(_csMyServiceDD);
        // Get task variables from database for comparison
        string query = "SELECT TaskDay, TaskStartTime, TaskEndTime FROM MyService_TaskSchedule where TaskName = 'DoImport'";
        SqlCommand cmd1 = new SqlCommand(query, conn);
        // opens the connection to read
        conn.Open();
        SqlDataReader rdr1 = cmd1.ExecuteReader();
        while (rdr1.Read())
        {
            TaskDay = rdr1.GetValue(0).ToString();
            TaskStartTime = rdr1.GetValue(1).ToString();
            TaskEndTime = rdr1.GetValue(2).ToString();
        }
        // closing the connection
        conn.Close();

        // setting _lastRun variable to this moment.
        _lastRun = DateTime.Now;
        // stop the timer 
        _timer.Stop();
        try
        {
            // check if the current time is within the time range for this service task.
            if (DateTime.Now.DayOfWeek.ToString() == TaskDay && DateTime.Now > Convert.ToDateTime(TaskStartTime) && DateTime.Now < Convert.ToDateTime(TaskEndTime))
            {
                _thread = new Thread(new ThreadStart(ImportData));
                _thread.Name = "ImportData";
                _thread.Start();
            }
            // decide if there is something to do
            #region Write to Audit Log
            string Event = "Update Service";
            string DoneBy = "Automation User";
            string Information = "Update Service has started importing data.";
            string MyTimeStamp = DateTime.Now.ToString();

            string writeit = "INSERT INTO MyService_Activities (Event, DoneBy, Information, TimeStamp) values(@Event, @DoneBy, @Information, @TimeStamp)";
            SqlCommand WriteLog = new SqlCommand(writeit, conn);
            conn.Open();
            WriteLog.Parameters.AddWithValue("Event", Event);
            WriteLog.Parameters.AddWithValue("DoneBy", DoneBy);
            WriteLog.Parameters.AddWithValue("Information", Information);
            WriteLog.Parameters.AddWithValue("TimeStamp", MyTimeStamp);
            WriteLog.ExecuteNonQuery();
            conn.Close();
            #endregion
        }
        catch (Exception ex)
        {
            // Catch error and write to audit log
            #region Write to Audit Log
            string Event = "Update Service";
            string DoneBy = "Automation User";
            string Information = "Error occurred in Import - Message: " + ex.ToString() + "";
            string MyTimeStamp = DateTime.Now.ToString();

            string writeit = "INSERT INTO MyService_Activities (Event, DoneBy, Information, TimeStamp) values(@Event, @DoneBy, @Information, @TimeStamp)";
            SqlCommand WriteLog = new SqlCommand(writeit, conn);
            conn.Open();
            WriteLog.Parameters.AddWithValue("Event", Event);
            WriteLog.Parameters.AddWithValue("DoneBy", DoneBy);
            WriteLog.Parameters.AddWithValue("Information", Information);
            WriteLog.Parameters.AddWithValue("TimeStamp", MyTimeStamp);
            WriteLog.ExecuteNonQuery();
            conn.Close();
            #endregion
        }
        _timer.Start();
    }

Answer 1

您确定捕捞{}是否按预期工作？ 我怀疑您没有收到任何反馈，因为您的SQLConnection无法正常工作。 尝试执行更简单的日志记录以排除它。

Answer 2

您的问题和标签并没有给我们太多帮助。 您正在使用C＃吗？ 而且，我假设使用Visual Studio？

真正帮助我调试服务的是NLog 。

您通过NuGet安装它，对于初学者来说很容易。 这只是许多优秀教程之一。 我写到普通的旧.txt文件。

基本上，您在整个代码中都添加了一堆日志注释，然后尝试启动服务。 当它失败时，您打开日志.txt并查看最后写入的内容是什么。 现在，您知道它在该日志行和您的下一个日志行之间失败了。

在对NLog感到满意之后，您甚至可以在代码中放置一个全局的，未处理的错误捕获器，并将Exception写入NLog，这会将StackTrace写入您的日志并为您提供更多详细信息。 您必须将NLog.config文件设置为将Exception格式化为文本。

Answer 3

我重新编写了整个内容，首先只是进行基本的服务启动，然后将代码添加到其中。 现在运作良好。 感谢大家的提示和指示。