How can I elevate my program on demand? (For example when clicking a button).
I don't like to set the privileges in the manifests file, I am talking about
elevating my VB.Net program at runtime.
Does anyone know how to do this?
I appreciate every helpful answer :)
You can't elevate your program on demand as such. Your options are:
Restart your application using the RunAs verb (see start batch file from within vb.net as admin)
Start your application with the required privileges in the first place
Okay, using the RunAs-Method to elevate it. (This requires a restart tho)
Private Sub RestartElevated()
Dim startInfo As New ProcessStartInfo()
startInfo.UseShellExecute = True
startInfo.WorkingDirectory = Environment.CurrentDirectory
startInfo.FileName = Application.ExecutablePath
startInfo.Verb = "runas"
Try
Dim p As Process = Process.Start(startInfo)
Catch ex As System.ComponentModel.Win32Exception
Return
End Try
Application.[Exit]()
End Sub
Related
I searched many times in this topic but with no luck, I have an application on WPF that use Click Once to published and there fore I can't use Admin Privilege, and I need to implement some actions in the installation Process like restart SQL server for example and for that I need Admin Privilege and since i start publishing using click once I had to remove Admin Privilege now, i tried restart my application to force Admin rights using the following code but didn't work
Public Function IsRunAsAdmin() As Boolean
Try
Dim id As WindowsIdentity = WindowsIdentity.GetCurrent()
Dim principal As WindowsPrincipal = New WindowsPrincipal(id)
Return principal.IsInRole(WindowsBuiltInRole.Administrator)
Catch __unusedException1__ As Exception
Return False
End Try
End Function
Public Sub AdminRelauncher()
If Not IsRunAsAdmin() Then
Dim proc As ProcessStartInfo = New ProcessStartInfo()
Dim procExecuting As New Process
proc.UseShellExecute = True
proc.WorkingDirectory = Environment.CurrentDirectory
proc.FileName = Assembly.GetEntryAssembly().CodeBase
proc.Verb = "runas"
Try
procExecuting = Process.Start(proc)
Application.ExitThread()
Application.Exit()
Catch ex As Exception
Console.WriteLine("This program must be run as an administrator! " & vbLf & vbLf & ex.ToString())
End Try
End If
End Sub
I still get the Error "Can not open MSSQL$****** on computer" after i searched of course i found the cause is admin rights needed.
So now i'm working on Code Signing Certificates as some one advise me that this will work for me.
but i'm an individual and my application price is not high enough to buy a paid certificate so i was wondering if i can make a self Code Signing Certificate and use it with click once.
Thank you.
I finally manged to figure out the problem my self, it was the admin rights.
The problem was that the code simply need like 2-3 mile seconds to execute so when i tracked the code i found that my code manged to stop the service indeed but wasn't able to start it again as it didn't take the time for the service to fully stop.
The solution was simple as it just needed couple of seconds to after it execute the code to stop the service.
So simply need to add a code in between.
First
Imports System.Threading
Then use the code as following
Dim service As ServiceController = New ServiceController("SQL Server (SQLEXPRESS)")
service.Stop()
Thread.Sleep(10000)
service.Start()
You see the code where Thread.sleep is make the application wait 10 seconds before it complete to execute the code.
This time is depends on the machine it self, 2-3 sec was enough but some other machine needed more time so to be in the safe side just add more seconds as I did.
Thank you, and "Stay Safe".
I have a VB.net app where I invoke Import-Module on a PowerShell from within my vb.net Window Application but the error says it could not find the module. Error as below.
Import-Module : The specified module 'MSOnline' was not loaded because no valid module file was found in any module directory.
When I load the same Module by launching the PowerShell externally in the usual way it works fine. Image as below.
The VB script is as below
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim procStartInfo As New ProcessStartInfo
Dim procExecuting As New Process
With procStartInfo
.UseShellExecute = True
.FileName = "powershell.exe"
.WindowStyle = ProcessWindowStyle.Normal
.Verb = "runas" 'add this to prompt for elevation
Dim psscript As String = My.Resources.mymsolPS
procStartInfo.Arguments = psscript
procExecuting = Process.Start(procStartInfo)
End With
End Sub
My PowerShell Script is saved in my.resource as a txt file. My PowerShell Script is as below.
Import-Module Msonline
Connect-msolService
I replaced the PowerShell script to Get-Help and that works only it dosnt work when I use Import-Module Msonline.
One more information that can be shared is the module is stored in the below location.
C:\Windows\System32\WindowsPowerShell\v1.0\Modules\MSOnline\MSOnline.psd1
Any Help is greatly appreciated.
Thanks in Advance
Update 2:
More fiddling with it found some thing which i am not sure if is relevant.
If I launch the powershell from within my VB.net and run the below command I cant see the MSOnline module.
PS C:\windows\system32>> cd $env:WINDIR\System32\WindowsPowerShell\v1.0\Modules\
PS C:\windows\System32\WindowsPowerShell\v1.0\Modules>> dir
If I run the PowerShell directly from my system and run the above script I can see the Module
d----- 11/22/2017 2:59 PM MSOnline
Still a mystery for me which I cant crack. :(
A difference I notice is when launching from your app, or locally, the directory is either your user, or system.. so maybe the way PS is being loaded it can't find the module.
What about if you provide a full path to the module?
I've had much better luck using RunSpace - I use it to pass any powershell commands - here are a snippet from one of the sites and some examples to look at:
'Create the runspace.
Using R As System.Management.Automation.Runspaces.Runspace = _
System.Management.Automation.Runspaces.RunspaceFactory.CreateRunspace()
'Create the pipeline
Using P As System.Management.Automation.Runspaces.Pipeline = R.CreatePipeline()
'Open the runspace.
R.Open()
'Create each command (in this case just one)...
Dim Cmd As New System.Management.Automation.Runspaces.Command("C:\script.ps1", True)
'...and add it to the pipeline.
P.Commands.Add(Cmd)
'Execute the commands and get the response.
Dim Result As System.Collections.ObjectModel.Collection(Of _
System.Management.Automation.PSObject) = P.Invoke()
'Close the runspace.
R.Close()
'Display the result in the console window.
For Each O As System.Management.Automation.PSObject In Result
Console.WriteLine(O.ToString())
Next
End Using
End Using
http://www.winsoft.se/2009/08/execute-a-cmdlet-or-ps1-script-from-visual-basic/
https://social.msdn.microsoft.com/Forums/vstudio/en-US/5d2279c8-e02c-45eb-a631-951c56067bb5/run-powershell-script-from-vbnet?forum=vbgeneral
https://code.msdn.microsoft.com/windowsdesktop/VBPowerShell-6b4f83ea
The last one provides a pretty solid breakdown of what it's doing. Let me know if you can't get it to work, I can try to see if this import works on an app.
I actually found the solution after hours of pain. This is pretty silly solution.
Went I went to my application Properties I found that the Preferred run was set to 32 bit hence when my PowerShell was launched from within it was looking for the module under SYSWOW where its suppose to look it under System32. I unchecked the "Preferred 32 BIT" and not it imports the module from system 32.
Thought I should share this silly miss so that others should not suffer the same.
I am writing an application that needs admin rights to run in VB.NET (VS2012,framework 4)
It is an app to protect the Hosts file from modification.
I want the app to start automatically with windows with the command line argument "autorun".
So I have made a check box with the following code:
Private Sub CheckBox_autoupdate_Click(sender As Object, e As EventArgs) Handles CheckBox_autoupdate.Click
Dim oreg As RegistryKey = Registry.CurrentUser
Dim okey As RegistryKey = oreg.OpenSubKey("Software\Microsoft\Windows\CurrentVersion\Run", True)
If CheckBox_autoupdate.Checked = True Then
okey.SetValue("HostProtect", Application.ExecutablePath & " /autoupdate")
Else
okey.DeleteValue("HostProtect")
End If
My.Settings.Save()
End Sub
When I open regedit, the value is present but when I restart my system the program is not executed at all!
Is it because the app needs admin priviledges? How can I make it start AND correctly pass the command line argument?
Anticipating your answers!
HKey_CurrentUser entries don't run when Windows starts. They run when the user logs in and the user's registry hive is loaded. If you want it to run when Windows starts, you'll need to use HKey_LocalMachine. Or even better, write this as a Windows Service.
Application.ExecutablePath will get the .exe link, not the path, so it should be:
Application.StartupPath & " \autoupdate.exe"
Alright guys I have a copy of minecraft wich is a java program launched by Minecraft.exe.
Inside the same folder is my program (lets call it launcher.exe) wich I am programming in VB.net and a Folder called LocalAppData.
If I place a shortcut in the same folder as Minecraft.exe, clear the "start in" field and put this in the target field:
C:\Windows\System32\cmd.exe /c start cd LocalAppData&& set APPDATA=%cd%\LocalAppData&& javaw -Xms4096M -Xmx4096M -cp LocalAppData\Minecraft.exe net.minecraft.LauncherFrame
then minecraft launches with my custom memory allocation from inside the LocalAppData folder. Two command windows appear as well. One closes when minecraft does, but the other does not and needs to be closed by the user
My Question is: How do I acheive the same result in VB.net instead of with a windows shortcut and is there a way to either stop the command windows appearing or setting them both to close automatically?
My goal is to launch minecraft from a subfolder, so local filepaths would be far preferrable to global filepaths, but figuring out the location of the application at runtime and working from a subfolder would be ok as well.
I thought I would be able to use the same code inside a Shell() command to produce the same effect, but it appears not.
Ideally I want to create a program that runs minecraft with:
Custom memory allocation
Local filepaths so that it can be run portably
The appdata folder changed to the subfolder so that it can be run portably
Those command windows either gone or minimised and then close automatically when minecraft is closed by the user.
I know this is a big ask, but I'm 6 months into a programming course and I'll admit that I'm not the best programmer out there.
Once I know how to do this I can create the rest of the program that manages multiple installations in seperate subfolders and lets you choose wich one to launch, but I just need help with the actual launching of the java application itself.
Note:
I should clarify that Minecraft.exe is not something that I have made and that I don't program java. I'm just looking for a solution in VB.Net.
Thank you for reading all this and sorry for the long post.
Edit
Thank you for the help. This is what I have so far, but it produces an error "Error: Could not create the JavaVirtualMachine. Error: A fatal exception has occurred. Program will exit"
'Declare Processes
Dim appDataStartInfo As ProcessStartInfo = New ProcessStartInfo()
Dim javaStartInfo As ProcessStartInfo = New ProcessStartInfo()
Dim appPath As String = Application.StartupPath()
'Launch appdata relocation process
appDataStartInfo.FileName = "cmd.exe"
appDataStartInfo.Arguments = "/c start cd " & appPath & "&& set APPDATA=" & appPath & "\LocalAppData"
appDataStartInfo.UseShellExecute = True
Process.Start(appDataStartInfo)
'Launch Minecraft
javaStartInfo.FileName = "javaw.exe"
javaStartInfo.Arguments = "-Xms4096M -Xmx4096M -cp " & appPath & "\LocalAppData\.minecraft\bin\Minecraft.jar net.minecraft.LauncherFrame"
javaStartInfo.UseShellExecute = True
Process.Start(javaStartInfo)
Does anyone see where I've gone wrong?
The Process class (http://msdn.microsoft.com/en-us/library/system.diagnostics.process.aspx )allows you to launch a process. You set it up with a ProcessStartInfo instance (http://msdn.microsoft.com/en-us/library/system.diagnostics.processstartinfo(v=vs.80).aspx ).
I don't have the time to give you all the details, but this pseudo-code should get you started :
Dim startInfo As ProcessStartInfo = new ProcessStartInfo()
startInfo.FileName = "javaw.exe" 'That's the name of your executable
startInfo.Arguments = "your argument line"
startInfo.UseShellExecute = true 'Needed to open a command window
Process.Start(startInfo)
I am trying to reset IIS on a set of servers all at one time instead of looping through and resetting each one individually, but I can't seem to figure out how to do it. Could someone please give me an example? Thank you
I am using System.Diagnostics
With m_Process.StartInfo
.FileName = strFileName
.Arguments = String.Format("{0}{1}", server, strArguements)
.UseShellExecute = False
.CreateNoWindow = True
.RedirectStandardError = True
.RedirectStandardOutput = True
End With
I've seen a few questions today with similar conditions ("instead of looping") and I've been trying to figure out what the big deal is about looping. Since iisreset (what I am guessing is assigned to strFileName in your example) takes a single machine name, you are out of luck in that department.
I would assume that iisreset connects to the SCM on the target server and does a restart of the IIS Admin and dependent services.
I suppose you could roll your own iisreset.exe that took multiple servers on the command line, but internal to that you would have to use some kind of iteration.
Could you maybe explain why you can't or don't want to loop?
At some level you have to loop over the list of servers and send some message to each to instruct them to reset. Whether you do that by running iisreset with each server name or by some other means, you can't really make the loop go away.
However, if you're just saying that you want to start resetting all the servers as fast as possible rather than waiting for the first to finish resetting before you start resetting the second, it looks like you already have that. When you call m_Process.Start(), it should return as soon as the new iisreset process has started. As far as I can see, it doesn't block and wait until iisreset exits. Therefore, your iisreset processes should already run in parallel.
If I understand what you're asking, you're okay looping throught he servers, but you just don't want to wait for each server to complete before proceeding to the next one. Since ProcessStartInfo doesn't allow any way to detach from a process you're starting (be nice if it did), you can do it like this (obviously, missing your parameters and such):
Imports System.Threading
Class Restarter
Sub Main()
Dim ServerList As New List(Of String)
For Each server As String In ServerList
ThreadPool.QueueUserWorkItem(AddressOf RestartServer, server)
Next
End Sub
Sub RestartServer(ByVal Server As String)
Dim m_Process As System.Diagnostics.Process
With m_Process.StartInfo
.FileName = strFileName
.Arguments = String.Format("{0}{1}", Server, strArguements)
.UseShellExecute = False
.CreateNoWindow = True
.RedirectStandardError = True
.RedirectStandardOutput = True
End With
m_Process.Start()
End Sub
End Class