如何在Visual Studio 2010中调试Window服务

Question

I have create window service that read data from database.But, It does not read data from database.I am trying to debug but could not happen. I have written several log using eventviewer.but Log are not written in eventviewer.However, all the code work in Window form applications, the code is

eventLog1.WriteEntry("GApps Sync is Collecting parameters from GUI seting", System.Diagnostics.EventLogEntryType.Information);
       var folderPath = Path.Combine(Environment.GetFolderPath(
         Environment.SpecialFolder.ApplicationData), "GAppsSync");
       if (!Directory.Exists(folderPath))
       {
           eventLog1.WriteEntry("Please stop service and Run GUI Tool set all the syn parameter", System.Diagnostics.EventLogEntryType.Error);          
       }
        path = Path.Combine(folderPath, "databaseFile.db3");
        FileInfo fileInfo = new FileInfo(path);
        if (fileInfo.Exists)
        {
            eventLog1.WriteEntry("GApps Sync is getting parameters from GUI tool", System.Diagnostics.EventLogEntryType.Information);
            try
            {
                using (SQLiteConnection con = new SQLiteConnection("data source=" + path))
                {
                    con.Open();
                    SQLiteCommand cmdSyncPara = new SQLiteCommand("Select SyncInterval, CRMSetting,GoogleSetting,SyncOption From Synchroniszation",con);
                    SQLiteDataReader dataReader = cmdSyncPara.ExecuteReader();
                    eventLog1.WriteEntry("GApps Sync is Reading database parameter:", System.Diagnostics.EventLogEntryType.Error);
                    while (dataReader.Read())
                    {
                        SyncInterval = dataReader.GetString(0);
                        eventLog1.WriteEntry("GApps Sync is getting parameters from GUI tool Syncinterval:" + SyncInterval, System.Diagnostics.EventLogEntryType.Information);
                        CRMSetting = dataReader.GetString(1);
                        eventLog1.WriteEntry("GApps Sync is getting parameters from GUI tool CRMSetting:" + CRMSetting, System.Diagnostics.EventLogEntryType.Information);

                        GoogleSetting = dataReader.GetString(2);
                        SyncOption = dataReader.GetString(3);
                    }
                    eventLog1.WriteEntry("GApps Sync got GUI sync Options and Sync Interval parameters", System.Diagnostics.EventLogEntryType.Information); 
                    SQLiteCommand cmdReadData = new SQLiteCommand("Select Enable, GmailId,GmailPassword,EmployeeAccount From SyncDataDetail",con);
                    SQLiteDataReader dataReaderDetail = cmdReadData.ExecuteReader();
                    while (dataReaderDetail.Read())
                    {
                        DataContainer dc = new DataContainer();
                        dc.Enable = bool.Parse(dataReaderDetail.GetString(0));
                        dc.EmailText = dataReaderDetail.GetString(1);
                        dc.Password = Decrypt(dataReaderDetail.GetString(2));
                        dc.EmployeeAccount = dataReaderDetail.GetString(3);
                        ItemCollection.Add(dc);
                    }
                    eventLog1.WriteEntry("GApps Sync got GUI Save Account Mapping ", System.Diagnostics.EventLogEntryType.Information); 
                }
            }
            catch (Exception ex)
            {
                eventLog1.WriteEntry("GApps Sync Failed to get GUI Save Account Mapping ", System.Diagnostics.EventLogEntryType.Error); 
            }
        }            
    }

Answer 1

You should attach the process to the debugger in visual studio. You can do this from the debug menu. Then clicking on attach to process. A new window displays, select the process there and click on attach. Now you are in debug mode for your windows service.

Source: http://msdn.microsoft.com/en-us/library/7a50syb3(v=vs.110).aspx

Answer 2

the best way to debug the windows services edit your program.cs file like this

static class Program { 
    static void Main()  { 

        #if DEBUG ServiceName myService = new ServiceName();
            myService.onDebug(); 
        #else ServiceBase[] ServicesToRun;

            ServicesToRun = new ServiceBase[] 
            {  
                new ServiceName() 
            }; 

            ServiceBase.Run(ServicesToRun); 

        #endif
    } 
}

then run the file in debug mode add the break point where you want that. :)

Answer 3

From MSDN ( Debug Windows Service )

Add a method to your service that runs the OnStart and OnStop methods:

internal void TestStartupAndStop(string[] args)
{
    this.OnStart(args);
    Console.ReadLine();
    this.OnStop();
}

Rewrite the Main method as follows:

static void Main(string[] args)
        {
            if (Environment.UserInteractive)
            {
                MyNewService service1 = new MyNewService(args);
                service1.TestStartupAndStop(args);
            }
            else
            {
                // Put the body of your old Main method here.
            }
       }

Note: You also need another constructor for your service ie:

public Service1(string[] args)

if you want to pass arguments.

In the Application tab of the project's properties, set the Output type to Console Application. (do not forget this step!)

Choose Start Debugging (F5).

This will pop up a console window, run onStart, and patiently wait for you to hit a key in the console window to end your service.

To run the program as a Windows Service again, install it and start it as usual for a Windows Service. It's not necessary to reverse these changes.