尝试在C＃中写入文本文件时出现UnauthorizedAccessException

Question

I'm trying to write a blank text file which is included within my installer but i'm getting the following error;

System.UnauthorizedAccessException: Access to the path 'C:\Program Files (x86)\Hex Technologies\wamplocation.txt' is denied.

It seems to be the permissions of the file once it's installed through my installer, but how can I set the file to be fully modifiable once the file installed?! Can this be done through C#?!

EDITTED;

           wamp_url = openFileDialog1.FileName.ToString();
           String EnviromentPath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
           StreamWriter outfile = new StreamWriter(EnviromentPath + @"\Hex Technologies\wamplocation.txt");
           outfile.Write(wamp_url);
           outfile.Close();

Answer 1

You should not store your modifyable data files in the Program Files path. Use Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) or Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData)

The Program Files\\... path is protected against modification by normal users on Win7+. It would be a bad idea to try to circumvent that protection.

Answer 2

The likleyhood is the UAC is getting in your way.

Ideally your program shouldn't be writing to this location, it this modification file is to be modified during an install process and nowhere else you need to make sure that you are running elevated.

If this file is to be modified at run time you should consider the use of either %appdata% for user data or %programdata% for program data instead of program files.