RemoteCertificateValidationCallback is triggered multiple times

Question

RemoteCertificateValidationCallback is triggered multiple times

S Abijith 496

Hi All,

We have a WPF application built on .Net Framework 4.8. We are using HTTPs protocol to connect to a device to execute a few commands. We use the RemoteCertificateValidationCallback for validating the certificate.

Initially, we open an Https connection to the device and validate the certificate using RemoteCertificateValidationCallback method.

Once the initial connection is established, we send out a series of commands, one at a time to device.

But the problem that we are facing is that this callback method is being called each time a new command is executed.

We want the callback method to be called only once when we open the connection. All other times we want the same connection to be used without calling the callback method.

We have attached the code that is being usedHTTPs_Connection.txt.

Can anyone please help us on this?

Any help is appreciated!!

Thank you in advance!!

Anonymous

2024-06-11T08:59:22.7166667+00:00

Hi,@S Abijith.Welcome to Microsoft Q&A.

1.

Assuming that the server is "a" WebApi project, after my test, the SendRequest method is executed multiple times, but AcceptAllCertifications is only executed once initially.

Perhaps it is because of the "device" mentioned that the different results are produced.

In addition, although you set request.KeepAlive = true; , if the server does not allow you to stay connected, the callback will be executed multiple times. Can you ensure that you are always connected?

If you can describe the recipient of SendRequest more accurately, I will be able to help you more accurately

2.

Current suggestion: Can you add a conditional judgment to add or unregister the callback?

When it is the first time:

ServicePointManager.ServerCertificateValidationCallback += AcceptAllCertifications;

When it is not the first time:

ServicePointManager.ServerCertificateValidationCallback -= AcceptAllCertifications;