[C# Windows Forms] Open form in static main

Question

Hi everybody.
I have 2 form : MainFrm is main form and Notification is form used to show notification.
In program.cs :

static void Main()
{
bool result;
Mutex mutex = new Mutex(true, "UniqueAppId", out result);
if (!result)
{
//MainFrm.showNotification("KyAppAPI??????????");
//MessageBox.Show("KyAppAPI??????????");
Notification notiBox = new Notification();
notiBox.Show();
return;
}

Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false);

Application.Run(new MainFrm());

GC.KeepAlive(mutex);

}

[/CODE]

I use mutex to keep application run once. If application already running, form Notification will show.
But my code work not right, form Notification not shown.
In MainFrm, I has a static method showNotification (using Tulpep Notification). I try calling this method in static main, but it not working, too.
However, if I use MessageBox, it working fine.
I don't know where the problem is. Please help me.

Salman Beg · Answer

Hi. First put try catch block in your code and follow this article to do the same, https://www.c-sharpcorner.com/UploadFile/puranindia/try-catch-finally-in-C-Sharp/ https://www.tutorialsteacher.com/csharp/csharp-exception-handling https://www.tutorialspoint.com/csharp/csharp_exception_handling.htm After that run the program and debug the code and for that you can follow this article, https://docs.microsoft.com/en-us/visualstudio/debugger/debugger-feature-tour?view=vs-2017 https://www.dotnetperls.com/debugging Thanks.

Thang Le · Answer

@Salman : Thanks for your reply. I 'm a newbie C# so I don't know how debug in Visual Studio. Here is code file Notification.cs : public partial class Notification : Form { private System.Windows.Forms.Timer timer1; private System.Windows.Forms.Timer timer2; public Notification() { InitializeComponent(); timer1 = new System.Windows.Forms.Timer(); timer1.Interval = 10; timer1.Tick += new EventHandler(timer1_Tick); timer1.Start(); timer2 = new System.Windows.Forms.Timer(); timer2.Interval = 10; timer2.Tick += new EventHandler(timer2_Tick); } public void timer1_Tick( object sender, EventArgs e) { Rectangle workingArea = Screen.GetWorkingArea( this ); if (Location.Y > workingArea.Bottom - Size.Height) { this .Location = new Point(Location.X, Location.Y - 1); } else { timer1.Stop(); Thread.Sleep(3000); timer2.Start(); } } public void timer2_Tick( object sender, EventArgs e) { Rectangle workingArea = Screen.GetWorkingArea( this ); if (Location.Y { this .Location = new Point(Location.X, Location.Y + 1); } else { timer2.Stop(); } } public void show() { Rectangle workingArea = Screen.GetWorkingArea( this ); this .Location = new Point(workingArea.Right - Size.Width, workingArea.Bottom); this .Show(); } }

Salman Beg · Answer

Hi. By looking at your code I didn't find any kind of error. Could you please put the whole code in try catch block, put debugger and check whether you are getting any error or not. Thanks