How do I download .DAT file in client system where browser to ask for their physical location

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I have generated .DAT file and stored it in Server temp folder. Now When user clicks on Download button, the file is to be downloaded into their system. Before downloading a file, I want the browser to ask for a location in client's system like the way it happens when user downloads file in another browser.
What is the best practices to do it??

What I have tried:

checked in URL asp.net - How to download Server files into client system using c# - Stack Overflow[^].
Used WebClient but was not able to ask for a location in client's system

Posted 7-Dec-16 20:08pm

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Updated 7-Dec-16 23:02pm

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OriginalGriff · Accepted Answer · 2016-12-07T23:02:00

You can't - it depends on the browser. Chrome for example always stores files in it's "downloads" folder, while some versions of IE brought up a "save" dialog by default (though this could be overridden).

You - as the server - have no control over what the client browser does with a file - you just serve it to the client and let it get on with it. (And TBH, if your website started making me specify where I wanted files, I wouldn't be a happy bunny).