How to download local drive file in ASP.NET

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i need to bind a anchor with a file that place in a folder of my computer "D" drive.

my code is:-

<a href="~/test.pdf" target="_blank" download="test.pdf" > download</a>

this code is working fine if i want to download a fine that place inside my project folder.

but i need to bind a find path that place in my any local drive folder.

What I have tried:

<a href="file:///D:/Doc/test.pdf" target="_blank" download="test.pdf" > download</a>

i tried this code but getting error msg :

Not allowed to load local resource: file:///D:/doc/test.pdf

Posted 11-Jul-20 5:23am

TCS54321

Updated 11-Jul-20 8:05am

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Richard MacCutchan 11-Jul-20 11:31am

You are not allowed to access client drives from the browser. It would be a security breach.

TCS54321 11-Jul-20 11:48am

i am using my own computer local drive. and set read write permission to everyone. but same error i got it.

Richard MacCutchan 11-Jul-20 12:04pm

It does not matter which computer you are using. Accessing local drives from browsers is not permitted. Ever.

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OriginalGriff · Answer 1 · 2020-07-11T06:07:00

Your website doesn't run under your user account on the web server - it runs under an account specifically set up for the web server software - IIS, probably.
Unless that user has been given access to the relevant parts of the D: drive - and it isn't given anything more than it absolutely needs in order to run for security reasons - it won't be able to access any files on it, read or write.

Additionally, there is no guarantee that when you release the website, the computer will even have a D: drive, much less that IIS will have access to it. You very definitely should not be hard coding file paths - that's why "~/..." works: the "~" indicates to IIS the home folder for that website and needs to be mapped to give a "real" file location.

Dave Kreskowiak · Answer 2 · 2020-07-11T08:05:00

Solution 2

You can't.

Code running on the server has no access to the client machines resources, like the file system.

Javascript running in the browser, and any HTML, also has no access to the client machine resources, like the file system.

You have to upload the file to the web server in order to use it.

Posted 11-Jul-20 8:05am

Dave Kreskowiak

Updated 11-Jul-20 8:07am

v2