'Change the iframe file name - asp.net MVC

I have a iframe like

<iframe id="iframe" src="/content/#@(fileUrl)" style="width: 100%; height:100%" frameborder="0" allow="fullscreen"></iframe>

fileUrl comes as a GuId and I don't want to download the file named as a GuId. I want to change it with a parameter I send in .cshtml file.

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