CODEWITHSUNDEEP
c#.netwindowswinforms
Tamzin
Tamzin

Reputation: 79

C# Application not shutting down correctly (still runnning in memory after form closed)

I have an odd situation where my application process still lingers in memory after my closing down my main form, my Program.cs code is below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO;

namespace WindowsFormsApplication1
{
    static class Program
    {    
        [Flags]
        enum MoveFileFlags
        {
            None = 0,
            ReplaceExisting = 1,
            CopyAllowed = 2,
            DelayUntilReboot = 4,
            WriteThrough = 8,
            CreateHardlink = 16,
            FailIfNotTrackable = 32,
        }

        [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
        static extern bool MoveFileEx(
            string lpExistingFileName,
            string lpNewFileName,
            MoveFileFlags dwFlags
        );

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
        string lockFile = "run.dat";
        if (!File.Exists(lockFile))
        {
            // that's a first run after the reboot => create the file
            File.WriteAllText(lockFile, "");

            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form2());
        }
        else
        {
            // that's a consecutive run      
        }
          Application.Run(new Form1());
        }
    }
}

Upvotes: 3

Views: 2239

Answers (4)

Nasenbaer
Nasenbaer

Reputation: 4900

I've solved my situation. Read this article for details.

I put the critical part into an own thread. The thread is set to Thread.IsBackground = True Now DotNet manage to kill this thread on application exit.

Dim thStart As New System.Threading.ParameterizedThreadStart(AddressOf UpdateImageInGuiAsync)
Dim th As New System.Threading.Thread(thStart)
th.Start() 
th.IsBackground = True

Background thread Regards

Upvotes: 1

Erwin Alva
Erwin Alva

Reputation: 393

If the lockfile does not exist, you get a new "main form" running. I guess Form1 is a hidden form when run.

Upvotes: 1

sshah
sshah

Reputation: 176

You should only have one Application.Run to ensure there is only one message loop on current thread and avoid the kind of problem you are describing.

Upvotes: 5

Chris Shain
Chris Shain

Reputation: 51329

This is usually indicative of a background thread that hasn't terminated.

Upvotes: 2

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