.Net how to send a long generated file to a web browser?

Question

.NET

The report is generated on the server. Depending on the amount of data, 20-30 minutes can be generated. How can I generate it, save it, and give a link to this file? At the same time, it is not saved in the server file system.

Answer 1

Start writing to Response.OutputStream at least something.
For example, with this approach, the client starts receiving the file immediately without waiting for the end of the archive formation.

Response.ContentType = "application/zip";
Response.AppendHeader("Content-Disposition", "attachment; filename=qqq.zip");
zipFile.Save(Response.OutputStream);

Response.End();

It should be borne in mind that the worker thread will be busy and at the same time you will not give many files in this way.