Hi, I have maui app on WINDOWS 8 desktop. I have shortcut to exe. When i click on exe it create and instance of this app. It possible to limit to only one instance of app will be alive ? Thanks in advance,

Hello, After in-depth investigation, activating the existing instance is better than mutex. Because when using Mutex, the program will still go through the process of starting and exiting, but using the instantiation feature provided by WinUI, the second program window will not be launched. You could refer to Making the app single-instanced for more detailed information. Best Regards, Alec Liu. If the answer is the right solution, please click " Accept Answer " and kindly upvote it. If you have extra questions about this answer, please click "Comment". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

See this example: https://github.com/mattleibow/MauiSingleInstanceApp

Maui - create only one instance

Accepted answer

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 35,726 Reputation points Microsoft Vendor

2024-03-21T05:16:54.2166667+00:00

Hello,

After in-depth investigation, activating the existing instance is better than mutex.

Because when using Mutex, the program will still go through the process of starting and exiting, but using the instantiation feature provided by WinUI, the second program window will not be launched.

You could refer to Making the app single-instanced for more detailed information. Best Regards,

Alec Liu.

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
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Dani_S 2,726 Reputation points

2024-04-04T11:55:39.37+00:00

Hi,

This code not work after rebuild in relase mode and

publish as an exe:

dotnet publish -f net8.0-windows10.0.19041.0 -c Release -p:WindowsPackageType=None -p:WindowsAppSDKSelfContained=true -p:RuntimeIdentifierOverride=win10-x64

rebuild in debug mode is working

public partial class App : Application

{

private static Mutex mutex = new Mutex(true, Assembly.GetEntryAssembly().GetName().Name); public App() { if (!mutex.WaitOne(TimeSpan.Zero, true)) { Current.Quit(); Environment.Exit(0); } InitializeComponent();

Dani_S 2,726 Reputation points

2024-04-04T11:56:19.8733333+00:00

Please check.

Dani_S 2,726 Reputation points

2024-04-05T09:19:41.3466667+00:00

Can you please answer ?

Dani_S 2,726 Reputation points

2024-04-05T09:19:57.6333333+00:00

......

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 35,726 Reputation points Microsoft Vendor

2024-04-08T08:56:17.4533333+00:00

For singletons, please refer to the updated official tutorial on ensuring that the program runs as a singleton by changing the configuration file.

Dani_S 2,726 Reputation points

2024-04-08T11:15:55.5966667+00:00

why singelton? is not connected to my question?

Dani_S 2,726 Reputation points

2024-04-09T07:53:34.29+00:00

Any answer please ?
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Maui - create only one instance

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