ASP.NET MVC3 How to Persist File Upload Data Across Multiple Requests Without Saving File to Disk?

Once you parse the CSV file into a model you could store this model into the Session so that if the user chooses "Yes" you would fetch the model from the session and persist it to the database. If you don't want to store large quantities of data into the session you could always save the model into some temporary file on disk and store only the path to this temporary file into the Session so that you could retrieve it later.

The best non-disk persistent storage in ASP.net applications is the runtime cache.

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