ApplicationDeployment.IsNetworkDeployed sometimes returning false

N_HO 0

We have published a WPF(C#) app using clickOnce.

It has a function updating itself when a user skips start-up dialogue.

Usually it works without problem, but sometimes ApplicationDeployment.IsNetworkDeployed returned false so that the update-function has been couldn't execute.

Could you tell us when it occurs and how can I solve this problem?

Hui Liu-MSFT 40,266 Reputation points Microsoft Vendor

2023-11-21T06:37:29.6666667+00:00

Hi,@NTC 小野塚(光). Welcome to Microsoft Q&A Forum. The ApplicationDeployment.IsNetworkDeployed property in ClickOnce applications is expected to return false in a few scenarios. Here are some potential reasons and solutions:

Running from Debug Mode:

If you are running the application from Visual Studio in debug mode, IsNetworkDeployed will return false. Make sure you are running the published version of your application.

Application not Deployed with ClickOnce:

Ensure that your application has been published and deployed using ClickOnce. If the application is copied manually or deployed through another mechanism, IsNetworkDeployed may return false.

Different Execution Contexts:

The IsNetworkDeployed property checks whether the application is running under ClickOnce deployment. If the application is launched from a different execution context or environment, it might return false. Make sure you are launching the application through the ClickOnce deployment.

Anti-virus or Security Software:

Some security or anti-virus software may interfere with the ClickOnce deployment and affect the behavior of IsNetworkDeployed. Check if any security software is blocking the ClickOnce deployment.

Check ClickOnce Deployment Settings:

Ensure that your ClickOnce deployment settings are configured correctly. Verify that the deployment manifest is published to the correct location and that the installation URL is accessible.

Check for ClickOnce Updates:

Verify that there are no pending updates or installations occurring in the background that might interfere with the ClickOnce deployment process.

Logging and Error Handling:

Implement logging and error handling in your application to capture more information when IsNetworkDeployed returns false. Log relevant details, such as the application version, deployment URL, and any error messages.

If you still have questions, please feel free to let me know. The problem will be better solved if more details are described (steps, error messages, and code to reproduce the problem).
N_HO 0 Reputation points

2023-12-12T12:30:18.12+00:00

@Hui Liu-MSFT
Thank you for your helpful comment.
And I'm sorry for my English is not so good.

The application has already released and many users use it.
So I guess this issue isn't only under development phases.
Actually, we still couldn't occur in our test environment, but only some users experienced.

By the way, we noticed the issue likely occur when users use our application with multiple processes or windows.
Don't you have any ideas about it?
Should we make the application can't be used in that way?