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c#directoryfile-permissionsunc

Write permissions on a folder or UNC path in c#

Any way to check if write permissions are available on a given path that could be either a local folder (c:\temp) or a UNC (\server\share)? I can't use try/catch because I might have write permissions but not delete so I wouldn't be able to delete created file...

Solution

  • Yes you can use the FileIOPermission class and the FileIOPermissionAccess enum.

    FileIOPermissionAccess.Write:

    Access to write to or delete a file or directory. Write access includes deleting and overwriting files or directories.

    FileIOPermission f = new FileIOPermission(FileIOPermissionAccess.Write, myPath);

try
{
   f.Demand();
   //permission to write/delete/overwrite
}
catch (SecurityException s)
{
   //there is no permission to write/delete/overwrite
}