Question

How to resolve 'Server cannot set status after HTTP headers have been sent' error when trying to download files via web api call?

Answer 1

To resolve the 'Server cannot set status after HTTP headers have been sent' error when trying to download files via web API call, you can make use of the Response.Flush() method.

Step-by-step explanation:

To resolve the 'Server cannot set status after HTTP headers have been sent' error when trying to download files via a web API call, you can make use of the Response.Flush() method. This method sends the current buffered output to the client and clears the buffer.

To implement this solution, you can follow these steps:

1. Check if the Response.IsClientConnected property is true.
2. If the property is true, call the Response.Flush() method.
3. After calling Response.Flush(), you can set the status code using Response.StatusCode and add any additional headers, if necessary.
4. Finally, you can call Response.End() to stop further processing of the request.