How to detect the existence of html files

Question

How to detect the existence of html files

李畋岷 76

I called a html file through js interop in Blazor component and opened a web page. But in any case, I can't pass the status information of the page's closing to the component. What should I do?

Farid Uddin Kiron MSFT 456 Reputation points Microsoft External Staff

2023-09-07T07:37:05.6433333+00:00

Could you please share how you are doing that? Are there any error encountered while you are doing that? Have you checked the logs?
李畋岷 76 Reputation points

2023-09-07T08:30:13.37+00:00

No error message appears. But the variable UVHasOpen' value is inconsistent. The variable has been set to true when the html file is started, but it is still false when the page exits. It is not the same copy before and after.

1 answer

Your answer

Farid Uddin Kiron MSFT 456 Reputation points Microsoft External Staff

2023-09-07T07:37:05.6433333+00:00

Could you please share how you are doing that? Are there any error encountered while you are doing that? Have you checked the logs?
李畋岷 76 Reputation points

2023-09-07T08:30:13.37+00:00

No error message appears. But the variable UVHasOpen' value is inconsistent. The variable has been set to true when the html file is started, but it is still false when the page exits. It is not the same copy before and after.

Answer 1

Johan Smarius 470 MVP

If I understand you correctly, you want to pass information between the page containing the js function and another page. For simple information, you could use query string parameters for this (page.html?param1=1&param2=3). You could also store this information in the session on the page containing the js function and retrieve this information on the new page.

李畋岷 76 Reputation points

2023-09-07T01:29:19.5566667+00:00

This is my html file and referenced the marked js file.

This is my js file.

This is a reference to the js file in the Blazor project.

Then I invoke the function in the js file through js interop in Blazor component:

Now, I want to receive the message that the web page opened by the html file is closed in the razor component. I want to pass this information through the variable(UVHasOpen) in the js file. However, the js file referenced in the Blazor and the same js file referenced in the html file are two copies, and they cannot communicate with each other. DotNet method doesn't work either. So this message can't be passed on.

Share via

How to detect the existence of html files

1 answer

Your answer