How to start a Process as administrator mode in C

Question

I have a Visual Studio Windows app project  I ve added code to download an installer update file  The installer after it has finished downloading would need administrator privileges to run  I have added a manifest file   When user clicks on the DownloadUpdate exe  UAC prompts the user for Admin permissions  So I assumed that all processes created and called within DownloadUpdate exe will run in admin capacity  So I made the setup call my downloaded file with the following code   Process p   new Process    p StartInfo WindowStyle   ProcessWindowStyle Hidden  p StartInfo FileName   strFile  p StartInfo UseShellExecute   false  p StartInfo RedirectStandardOutput   true  p StartInfo RedirectStandardError   true

User · Answer

var pass   new SecureString    pass AppendChar  s    pass AppendChar  e    pass AppendChar  c    pass AppendChar  r    pass AppendChar  e    pass AppendChar  t    Process Start  notepad    admin   pass         Works also with ProcessStartInfo   var psi   new ProcessStartInfo       FileName    notepad       UserName    admin       Domain           Password   pass      UseShellExecute   false      RedirectStandardOutput   true      RedirectStandardError   true    Process Start psi

User · Answer

Process proc   new Process                                                                                     ProcessStartInfo info                       new ProcessStartInfo  Your Process name  exe   Arguments                       info WindowStyle   ProcessWindowStyle Hidden                     info UseShellExecute  true                     info Verb   runas                      proc StartInfo   info                     proc Start

User · Answer

First of all you need to include in your project   using System Diagnostics    After that you could write a general method that you could use for different  exe files that you want to use  It would be like below   public void ExecuteAsAdmin string fileName        Process proc   new Process        proc StartInfo FileName   fileName      proc StartInfo UseShellExecute   true      proc StartInfo Verb    runas       proc Start        If you want to for example execute notepad exe then all you do is you call this method   ExecuteAsAdmin  notepad exe

User · Answer

You probably need to set your application as an x64 app   The IIS Snap In only works in 64 bit and doesn t work in 32 bit  and a process spawned from a 32 bit app seems to work to be a 32 bit process and the same goes for 64 bit apps   Look at  Start process as 64 bit

User · Answer

This is a clear answer to your question  How do I force my  NET application to run as administrator   Summary   Right Click on project -  Add new item -  Application Manifest File  Then in that file change a line like this    lt requestedExecutionLevel level  requireAdministrator  uiAccess  false    gt    Compile and run

User · Answer

Use this method   public static int RunProcessAsAdmin string exeName  string parameters                try               System Diagnostics ProcessStartInfo startInfo   new System Diagnostics ProcessStartInfo                startInfo UseShellExecute   true              startInfo WorkingDirectory   CurrentDirectory              startInfo FileName   Path Combine CurrentDirectory  exeName               startInfo Verb    runas                 MLHIDE             startInfo Arguments   parameters              startInfo ErrorDialog   true               Process process   System Diagnostics Process Start startInfo               process WaitForExit                return process ExitCode            catch  Win32Exception ex                WriteLog ex               switch  ex NativeErrorCode                    case 1223                      return ex NativeErrorCode                  default                      return ErrorReturnInteger                           catch  Exception ex                WriteLog ex               return ErrorReturnInteger                    Hope it helps

User · Answer

Try this     Vista or higher check if  System Environment OSVersion Version Major  gt   6       p StartInfo Verb    runas       Alternatively  go the manifest route for your application

User · Answer

This works when I try it   I double-checked with two sample programs   using System  using System Diagnostics   namespace ConsoleApplication1     class Program       static void Main string   args          Process Start  ConsoleApplication2 exe                    using System  using System IO   namespace ConsoleApplication2     class Program       static void Main string   args          try           File WriteAllText   c  program files test txt    hello world                  catch  Exception ex            Console WriteLine ex ToString             Console ReadLine                          First verified that I get the UAC bomb      System UnauthorizedAccessException    Access to the path  c  program   files test txt  is denied       etc     Then added a manifest to ConsoleApplication1 with the phrase        lt requestedExecutionLevel level  requireAdministrator  uiAccess  false    gt    No bomb   And a file I can t easily delete     This is consistent with several previous tests on various machines running Vista and Win7   The started program inherits the security token from the starter program   If the starter has acquired admin privileges  the started program has them as well

User · Answer

Here is an example of run process as administrator without Windows Prompt          Process p   new Process      p StartInfo FileName   Server MapPath  process exe      p StartInfo Arguments         p StartInfo UseShellExecute   false    p StartInfo CreateNoWindow   true    p StartInfo RedirectStandardOutput   true    p StartInfo Verb    runas     p Start      p WaitForExit

[c#] How to start a Process as administrator mode in C#

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