MAUI facing issue regarding download file from URL

Question

1.00/5 (1 vote)

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Hi,
Trying to download file from url. code runs ok but cant see downloaded file. Help will be deeply appreciated.

What I have tried:

C#

InitializeComponent();
BindingContext = this;
var retrievefiles = new WebClient();
retrievefiles.DownloadFile("https://maliksuhail.github.io/myprices/hello.txt",System.IO.Path.Combine(FileSystem.Current.AppDataDirectory,"my.txt"));

Posted 11-Jun-23 19:30pm

suhail malik 2023

Updated 11-Jun-23 21:09pm

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2 solutions

Solution 1

Quote:
cant see downloaded file

Where did you look?

FileSystem.Current.AppDataDirectory returns different values depending on the system you are running on: Undesired behaviour of FileSystem.Current.AppDataDirectory · Issue #7657 · dotnet/maui · GitHub[^] - for some of them a Guid (presumably the App Guid) is part of the path.

So either use the debugger or a log file to find what exactly FileSystem.Current.AppDataDirectory returns on your target system and look there.

Posted 11-Jun-23 19:50pm

OriginalGriff

Comments

suhail malik 2023 12-Jun-23 2:01am

searched the whole folder, targetting windows machine

OriginalGriff 12-Jun-23 2:44am

Did you check for exceptions, and that the code is actually executed?

suhail malik 2023 12-Jun-23 2:51am

yes pretty sure can see output screen.
just confirmingg, application directory is meant to be app folder or i am looking somewhere else in windows machine.

suhail malik 2023 12-Jun-23 2:57am

i searched app folder

OriginalGriff 12-Jun-23 3:04am

That;'s why I said "So either use the debugger or a log file to find what exactly FileSystem.Current.AppDataDirectory returns on your target system and look there."

Windows has a separate folder structure for user data - you cannot store data in the app folder as it will fail in production (the app folder in prod is under Program Files and is write protected for security reasons)

It'll be under something like "C:\Users\YourUSerName\AppData\Local\{6FADABB5-BF80-41CE-9069-6465CFBA0E7B}/my.txt" but the GUID will be app dependant.

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Graeme_Grant · Accepted Answer · 2023-06-11T21:09:00

Solution 2

Set the following to a variable:

C#

retrievefiles.DownloadFile("https://maliksuhail.github.io/myprices/hello.txt",System.IO.Path.Combine(FileSystem.Current.AppDataDirectory,"my.txt"));

TO:

C#

var filePath = System.IO.Path.Combine(FileSystem.Current.AppDataDirectory,"my.txt");
retrievefiles.DownloadFile("https://maliksuhail.github.io/myprices/hello.txt", filePath);

Then you can output to the debug console:

C#

Debug.WriteLine($"File Path: {filePath}");

Now you can see exactly where the file is stored.

Posted 11-Jun-23 21:09pm

Graeme_Grant

Updated 11-Jun-23 21:10pm

v2

Comments

suhail malik 2023 12-Jun-23 5:43am

yes it worked it was C:\Users\DELL\AppData\Local\Packages\e17ea549-673f-4fd0-a10e-1a671ecd3daf_9zz4h110yvjzm\LocalState\my.txt. i thought it would be in app directory, thanks have a nice day 😊

Dave Kreskowiak 12-Jun-23 9:07am

Just to be clear, the "AppDataDirectory" is not "app directory", or what we would call the app directory that normally sits under Program Files, which is read only. You cannot create/write to files in any folder under Program Files.

"AppDataDirectory" is the AppData folder under the current users profile folder, usually "C:\Users\userId\AppData".

Zam Lazorde 28-Aug-23 10:00am

this method worked for me with images but when I use DownloadFile with pdf files it doesn't work;

Graeme_Grant 29-Aug-23 18:32pm

This method is not file-type specific. You will need to capture the error encountered and see what the issue is.