How to solve this error "Headers are read-only, response has already started"

[knox007]

I used some of the code on blazor in the csla 8.2.8 source code sample to create my own blazor server program. In this program I just add a page editperson, and when it runs it always says "Headers are read-only, response has already started".I find that errors always appear when I use vm.RefreshAsync.
I am a beginner, how can I solve this problem?
Thanks

[StefanOssendorf]

Please show the edit person create method. It looks like there is an await missing on the server side part.

[knox007]

Code

[StefanOssendorf]

Please post it here.

[knox007]

[knox007]

While debugging my program, I also debugged the program in the rock source code sample, and I did a comparison. I found in my vm. ApplicationContext. ContextManager. HttpContext.Items, No cslaSessionId this item, picture on the left is my program.

[rockfordlhotka]

This is almost certainly a configuration issue in Program.cs. Can you share the entire AddCsla call?

[knox007]

This doesn't feel much like a memory leak problem,The problem seems to have changed a bit, the error still appears when the page first loads, but when I try to refresh the page, the problem is gone,May be my configuration problem,What I have created is a blazor web app,not a blazor server application.When the page first loaded, the addition of the cslaSessionId raised an exception(Headers are read-only, response has already started), and when I refreshed the page, it's normal again. No exceptions are thrown,The cslaSessionId field also appears, that is so wired!!! I have been trying to find the cause of this problem, I have looked at the blazor8state demo, trying to find something helpful in it, but still can't find it

[rockfordlhotka]

Iirc, the landing page needs to be server-static rendered, because it is what creates the cookie with the session id.

[knox007]

thank you for your response,I think I'm one step closer to answering this question. I'm a little new to blazor. How do I configure an already created project?

[rockfordlhotka]

You shouldn't need to reconfigure the project - just the original home/landing page. Make sure it isn't rendered as an interactive page.

You are using per-component render mode, so only pages you mark with the rendermode element will be interactive.