C# Discussion Boards - CodeProject

Re: Service Starting Problem!

#realJSOP2-Jun-08 23:27

#realJSOP

2-Jun-08 23:27

Add a keep-alive thread that doesn't do anything but sleeps for 4.5 seconds.

protected void KeepAliveThread()
{
	ServiceController controller = new ServiceController(this.ServiceName);
	while (true)
	{
		if (controller.Status == ServiceControllerStatus.Running)
		{
			Thread.Sleep(4500);
		}
	}
}

In your OnStart() method, do this:

Thread thread = new Thread(new ThreadStart(KeepAliveThread));
thread.Start();

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
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Re: Service Starting Problem!

backSlashZero3-Jun-08 0:08

backSlashZero

3-Jun-08 0:08

Thanks! I tried it out but problem is still there Confused | :confused:

cout << "\0";
// its backSlashZero

Re: Service Starting Problem!

#realJSOP3-Jun-08 0:33

#realJSOP

3-Jun-08 0:33

Are you doing the following in OnStart()?

timer.Enabled = true;
timer.Start();

Re: Service Starting Problem!

backSlashZero3-Jun-08 0:52

backSlashZero

3-Jun-08 0:52

Yes i did!

protected override void OnStart(string[] args)
{
	eventLog1.WriteEntry("In OnStart: Calling web service for Sending Reminders on " 
		+ DateTime.Now.ToLongDateString());

	EmailObj.SendReminder(); \\send reminders if any!
	timer.Enabled = true;
	timer.Start();
}

cout << "\0";
// its backSlashZero

help in binding data to dropdowmlist

csp2-Jun-08 22:44

csp

2-Jun-08 22:44

DropDownList ddlst = new DropDownList();
ddlst = (DropDownList)e.Item.Cells[1].FindControl("eddpgmtype");
Object cobj = new Object();
objArrEntity = cobj.type_bind();
ddlst.DataSource = objArrEntity;
ddlst.DataTextField = "type";
ddlst.DataValueField = "ID";
ddlst.DataBind();
ddlst.SelectedItem.Text = e.Item.Cells[11].Text.ToString();
in cells[11] i have a hidden column of "type"
this is my code for binding data to dropdown when edit command is clicked.
actually dropdown consists of inbound,outbound,backoffice
the first record consits of programtype 'outbound' in datagrid
when i click edit i should able to see this outbound in dropdownlist as first item as well as list items of main dropdown(inbound,outbound,backoffice).but this inbound is getting overwritten by outbound.
i think question is clear
plz help me in binding the data as mentioned above.
Thank u

Error stop Http Listener

George_George2-Jun-08 21:58

George_George

2-Jun-08 21:58

Hello everyone,

Here is my simple application code for a Windows Service application. The question is, when stop the service, there is always,

// [System.InvalidOperationException] = {"Please call the Start() method before calling this method."}

Does anyone have any ideas why there is such issue and how to fix?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.ServiceProcess;
using System.Text;
using System.Net;
using System.Threading;

namespace TestServiceStop1
{
    public partial class Service1 : ServiceBase
    {
        private Thread _tHttpThread;
        private TestHttpServer _server;

        public Service1()
        {
            InitializeComponent();
        }

        protected override void OnStart(string[] args)
        {
            _server = new TestHttpServer(this);

            _tHttpThread = new Thread(_server.StartListen);

            _tHttpThread.Start();
        }

        protected override void OnStop()
        {
            // stop HTTP server
            _server.Stop(false);
        }
    }

    public class TestHttpServer
    {
        // listening HTTP port
        private int _Port = 0;

        // internal wrapped HTTP listener
        private HttpListener _Server = new HttpListener();

        private Service1 _manager;

        public TestHttpServer (Service1 manager)
        {
            _manager = manager;
        }

        public int ListenPort
        {
            get
            {
                return _Port;
            }
            set
            {
                _Port = value;
            }
        }

        public void StartListen()
        {
            try
            {
                IAsyncResult result;
                _Server.Prefixes.Add(String.Format("http://+:{0}/", 9099));
                _Server.Start();
                while (true)
                {
                    result = _Server.BeginGetContext(new AsyncCallback(this.HttpCallback), _Server);
                    result.AsyncWaitHandle.WaitOne();
                }
            }
            // any exceptions are not expected
            // catch InvalidOperationException during service stop
            // [System.InvalidOperationException] = {"Please call the Start() method before calling this method."}
            catch (Exception ex)
            {
                throw ex;
            }
        }

        public void Stop(bool isTerminate)
        {
            _Server.Stop();
        }

        // callback function when there is HTTP request received
        private void HttpCallback(IAsyncResult result)
        {
            HttpListenerContext context = _Server.EndGetContext(result);
            HandleRequest(context);
        }

        // find matched URL HTTP request handler and invoke related handler
        private void HandleRequest(HttpListenerContext context)
        {
            string matchUrl = context.Request.Url.AbsolutePath.Trim().ToLower();

            context.Response.StatusCode = 200;
            context.Response.StatusDescription = "OK";
            context.Response.Close();
        }
    } // end of Http Listener class
}

thanks in advance,
George