覆盖受限的应用程序文件？

Question

I'm trying to manually patch my application. The application makes use of a Service which i make sure to stop and uninstall prior to attempting any overwriting of the application dll's.

The issue is that i can't overwrite, or even delete some of the dll files which are the core of the application, these dll files are used by the service i uninstalled first.

I use the following method to pass in the new file-path in order to replace the old DLL which is located inside the root directory of the application in C:\\Program Files\\AppName\\

public static bool CopyFile(string newFile, string oldFile) {

  var newfile = new FileInfo(newFile); var oldfile = new FileInfo(oldFile); var f2 = new FileIOPermission(FileIOPermissionAccess.AllAccess, oldFile); f2.AddPathList(FileIOPermissionAccess.Write | FileIOPermissionAccess.Read, newFile); try { f2.Demand(); } catch (SecurityException s) { Console.WriteLine(s.Message); } for (int x = 0; x < 100; x++) { try { File.Delete(oldfile.FullName); newfile.CopyTo(oldfile.FullName, true); return true; } catch { Thread.Sleep(200); } } return false; } 

I just wish to provide a new file and remove the old one, replace it, overwrite it.... The application

Note: The application i run to do the patching runs as administrator.

Any idea?

Answer 1

I was able to fix this issue by making use of a "middle man" in other words, another application which downloads another executable and passes command line arguments to it.

Originally, my service would download an executable (call it Installer.exe ). Installer.exe would then attempt to stop the service and patch the content, this did not work.

I now have the service running, it downloads " Installer.exe ".

Installer.exe will load up and download PatchPayload.exe .

PatchPayload.exe runs and kills off the Service, uninstalls it and then download all required patch content from a centralized server and patch the service core files individually then install the service and run it again.