Question

好吧，我讨厌被难倒但是这次我。我能够让服务安装得很好，所以工作得很好。当我启动服务时，它会停止，我没有得到有关错误的详细信息。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

你确定你的捕捉{}按预期工作吗？我怀疑你没有得到任何反馈，因为你的SQLConnection无法正常工作。尝试做一个更简单的日志记录来排除它。

Answer 2

您的问题和标签不会让我们继续下去。你正在使用C＃？而且，我假设是Visual Studio？

真正帮助我调试服务的是NLog。

你通过NuGet安装它，它很容易为初学者。 Here只是众多优秀教程中的一个。我写的是普通的.txt文件。

您基本上在整个代码中添加了大量日志注释，然后尝试启动您的服务。当它失败时，你打开日志.txt，看看最后写的是什么。您现在知道它在该日志行和下一个日志行之间失败了。

在您对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，它将StackTrace写入您的日志并为您提供更详细的信息。您的NLog.config文件必须设置为将Exception格式化为文本。

Answer 3

我重写了整个事情，首先只是做一个基本的服务启动，然后我添加了我的代码。现在运作良好。感谢大家的提示和指示。

安装的Windows服务无法启动

3 个答案: