I want to develop a app which can download a file to USB Drive.But it seems that the fileSystem obtained through api is virtual.I can't move the file to USB Drive or write the file to it.
Can you give me some suggestion?
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How to access downloads folder in windows phone 8.1
(2 answers)
Closed 7 years ago.
I make program to download a xap file and store on local folder of application.the problem is i want to save the file on downloads folder of phone memory or SD card to install application from windows phone store app.
how can i store file on downloads folder using BackgroundDownloader
or path to downloads folder using StorageFile or URI?
how can i move file after download from local application folder to downloads folder?
thanks.
Check out the knownfolders class
https://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.knownfolders.removabledevices
This should help you.
With the new SDK 8.1 of Windows Phone is there a way to write file on SD Card ? Before we could only read. I have an idea to save file from my app on SD Card and this can be interesting for the Lumia 520 who have few memory.
More information about Data and Files you will find in the documentation. And as written here:
What you can access
Your app can only read and write files of file types that the app has registered to handle in the app manifest file.
Your app can also create and manage folders.
So if you had declared File Type Association - there shouldn't be a problem to write/read files.
Note also that your App can be installed on SD Card, then all its files will be located there.
I am using a cross-platform library in a Windows Runtime Component (C++) in a Windows 8.1 Store (Metro) app. This library makes C style file calls such as fopen, stat, etc.
These operations work fine when the file is in the local app scope (e.g. in the app's local directory). But if the file is located in other locations (for instance on the "Desktop") then these operations fail. Is there a way to make fopen and other file calls outside the local app folder without having to switch to StorageFile? As an alternative I can only think of copying all files to the local app folder.
Regards,
Is it possible to physically copy files to Isolated Storage using the ISETool? I'm trying to add a text file into Isolated Storage and then, through code, check if that file exists. When I do this, I get a "File does not exist" error.
If I add a file to Isolated Storage in code, it works successfully and I can access it in Isolated Storage via the ISETool to copy it to my PC.
Consider scenario 2:
I add a file into Isolated Storage in code, and then using the ISETool get it back to my PC. Without modifying the file, I place the SAME FILE back to Isolated Storage and try to open it through code, I see the same "File does not Exist" error.
You haven't said how you're writing files to Isolated Storage.
Instead, consider using something like Windows Phone Power Tools for this as it makes it much easier to work with files in Isolated Storage.
According to this MSDN article, you are able:
...to replace the files and directories in an app’s local folder on an
emulator or a device with files and directories from your computer....
Steps:
Deploy the app that you want to test to the emulator or a device.
Get the Product GUID for the app specified in the ProductID attribute of the App element of the WMAppManifest.xml file.
Open a Command prompt window and navigate to the location of ISETool.exe.
To replace all the files in the app’s local folder with files from your computer, type the following command using the Product GUID obtained in the previous steps and specify the source directory on your computer.
ISETool.exe rs <xd|de> <product-id> <desktop-path>
The following example shows a command that replaces the files and directories in an app’s local folder with the files from the directory "C:\Data\My Files" on your computer.
ISETool.exe rs xd 11111111-2222-3333-4444-555555555555 "C:\Data\My Files"
Hope this helps!
yes it is possible to copy to and from isostorage of phone or emulator
try this to upload or download files into iso storage
for wp8.1 only
https://isostorespy.codeplex.com/
for wp7
Windows Phone 7 Isolated Storage Explorer
for wp8
Windows Phone Power Tools