How to uninstall Software using c# by calling Software UninstallString Listed in Registry file of that Software But the Process Is Not Working

Question

I am developing a software that will list all the software install in Computer now i want to Uninstall it using my Program In C# by calling the Uninstall Key of that software in Registry Key My Program Is Like That But the Process Is Not Working

var UninstallDir = "MsiExec.exe /I{F98C2FAC-6DFB-43AB-8B99-8F6907589021}";
string _path = "";
string _args = "";
Process _Process = new Process();
if (UninstallDir != null && UninstallDir != "")
{
    if (UninstallDir.StartsWith("rundll32.exe"))
    {
        _args = ConstructPath(UninstallDir);
        _Process.StartInfo.FileName = Environment.SystemDirectory.ToString() + "\\explorer.exe";
        _Process.StartInfo.Arguments = Environment.SystemDirectory.ToString() + "\\" + UninstallDir;
        _Process.Start();
    }
    else if (UninstallDir.StartsWith("MsiExec.exe"))
    {
        _args = ConstructPath(UninstallDir);
        _Process.StartInfo.FileName = Environment.SystemDirectory.ToString() + "\\cmd.exe";
        _Process.StartInfo.Arguments = Environment.SystemDirectory.ToString() + "\\" + UninstallDir;
        _Process.Start();
    }
    else
    {
        //string Path = ConstructPath(UninstallDir);
        _path = ConstructPath(UninstallDir);
        if (_path.Length > 0)
        {
            _Process.StartInfo.FileName = _path;
            _Process.StartInfo.UseShellExecute = false;
            _Process.Start();
        }
    }

Thinhbk · Accepted Answer · 2012-02-03 09:45:15Z

2

Try this approach:

    Process p = new Process(); 
    p.StartInfo.FileName = "msiexec.exe"; 
    p.StartInfo.Arguments = "/x {F98C2FAC-6DFB-43AB-8B99-8F6907589021}/qn"; 
    p.Start();

Refer to this link: http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/msiexec.mspx?mfr=true

HTH.

answered Feb 3, 2012 at 9:45

Thinhbk

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1 Comment

Tushar T. Over a year ago

This is not enough to construct the path of : msiexec.exe /x {F98C2FAC-6DFB-43AB-8B99-8F6907589021}/qn some time the format if uninstallstring is like: msiexec.exe /I {F98C2FAC-6DFB-43AB-8B99-8F6907589021}/qn

Community · Accepted Answer · 2017-05-23 12:23:45Z

1

The problem with your misexec.exe code is that running cmd.exe someprogram.exe doesn't start the program because cmd.exe doesn't execute arguments passed to it. But, you can tell it to by using the /C switch as seen here. In your case this should work:

    _Process.StartInfo.FileName = Environment.SystemDirectory.ToString() + "\\cmd.exe";
    _Process.StartInfo.Arguments = "/C " + Environment.SystemDirectory.ToString() + "\\" + UninstallDir;

Where all I did was add /C (with a space after) to the beginning of the arguments. I don't know how to get your rundll32.exe code to work, however.

edited May 23, 2017 at 12:23

CommunityBot

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answered Jul 24, 2015 at 21:38

Quantic

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Comments

will-hart · Accepted Answer · 2016-03-10 05:48:52Z

0

Your solution looks good, but keep a space before \qn:

p.StartInfo.Arguments = "/x {F98C2FAC-6DFB-43AB-8B99-8F6907589021} /qn";

Otherwise it wont work in silent mode.

edited Mar 10, 2016 at 5:48

will-hart

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answered Mar 10, 2016 at 5:31

user1665368

1

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