Unauthorized Access Exception while trying to write in AppData-CodePudding

I am trying to copy a file from a remote computer in my AppData folder to then access this file whenever i want. The copy works just fine when the destination path is GetCurrentDir(), but i got an exception every time i try to write elsewhere, in particular AppData.

pathToCopy = Path.Combine(Path.GetTempPath(), "imgTemp.jpg");//doesn't work pathToCopy = Path.Combine(Directory.GetCurrentDirectory(), "imgTemp.jpg"); //works

And this is the code for my copy :

private void SaveImgTemp(string dest)
        {
            try
            {
                File.Copy(dest, pathToCopy, true);

                if (File.Exists(pathToCopy))
                {
                    Console.WriteLine("File copied successfully.");
                    
                }
            }
            catch (IOException e)
            {
                Console.WriteLine("An error occured: "   e.Message);
            }
        }

If anyone has an answer...

CodePudding user response：

You simply don't have write permissions to the app data folder. If you are debugging, you may need to run Visual Studio as administrator. Alternatively you can give read/write access to the AppData folder to your user.

CodePudding user response：

Try using Environment.GetFolderPath() to make your file names.

Source Path

var sourcePath = Path.Combine(
    AppDomain.CurrentDomain.BaseDirectory,
    "Source Directory",
    "image.png");

Where:

Destination Directory

var appData = Path.Combine(
    Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
    Assembly.GetEntryAssembly().GetName().Name,
    "Destination Directory");

// Ensure create directory  (doesn't disturb existing)
Directory.CreateDirectory(appData);

Destination File Path

var destPath = Path.Combine(appData, "image.png");

// Overwrite any existing file by that name.
File.Copy(sourcePath, destPath, overwrite: true);

if(File.Exists(destPath))
{
    Console.WriteLine($"Successsful write: {destPath}");
}