Console application checking if .NET installed

[Brian Stoop]

If .NET is not installed my console application pops up "the application
failed to initialize properly" dialog.

Can I programatically tell if .NET is installed, and pre-emp this message
with my own ?

thanks

[Rene]

Consider that the people not installing .NET might very well be some of

the same people that never runs Windows Update, so they would never have
this code that knew how to install .NET in the first place.

I can see your point, but .Net has bee around for a while, if Microsoft
would have started doing something about this issue since the very
beginning, *most* computer today would be able to handle this in a very
graceful way.

Yes I agree that there would always be a computer here or there that would
not be able to handle this, when this happens you will get an email and tell
the user how to fix the problem I guess.

[Willy Denoyette [MVP]]

"Brian Stoop" <b.*****@consul tant-spam.free.comwr ote in message
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..

Thanks Willy.

Your VBScript code checks the registry I think. I can check the regisry
from my Console App, but if .NET is not is not installed then the same
problem exists?

Is this Catch 22?

Exactly, you can't use a .NET program to check whether .NET is installed.
You need unmanaged code, and the easiest that comes to mind is a simple
script (vbscript, jscript), Windows comes with the scripting engines
installed by default.
Willy.

[Brian Stoop]

Its Catch 22 then. My app uses Managed code, and I dont wish to have 2
applications.

Thanks to everyone, B
"Willy Denoyette [MVP]" <wi************ *@telenet.bewro te in message
news:ek******** ******@TK2MSFTN GP02.phx.gbl...

"Brian Stoop" <b.*****@consul tant-spam.free.comwr ote in message
news:%2******** ********@TK2MSF TNGP02.phx.gbl. ..

>Thanks Willy.

Your VBScript code checks the registry I think. I can check the regisry
from my Console App, but if .NET is not is not installed then the same
problem exists?

Is this Catch 22?

Exactly, you can't use a .NET program to check whether .NET is installed.
You need unmanaged code, and the easiest that comes to mind is a simple
script (vbscript, jscript), Windows comes with the scripting engines
installed by default.
Willy.

[Willy Denoyette [MVP]]

No need to write two applications, say you have a console application
"someapp.ex e", then you can simply make a command line script like this:

@rem startapp.cmd
@Echo off
Set Version="HKLM\S OFTWARE\Microso ft\NET Framework Setup\NDP\v2.0. 50727"
reg query %version% /v Version >nul 2>nul
if not %errorlevel% == 0 (
Echo No such .Net version: %Version%
goto :end
)
someapp.exe
:end

Willy.

"Brian Stoop" <b.*****@consul tant-spam.free.comwr ote in message
news:%2******** ************@TK 2MSFTNGP06.phx. gbl...

Its Catch 22 then. My app uses Managed code, and I dont wish to have 2
applications.

Thanks to everyone, B
"Willy Denoyette [MVP]" <wi************ *@telenet.bewro te in message
news:ek******** ******@TK2MSFTN GP02.phx.gbl...

>"Brian Stoop" <b.*****@consul tant-spam.free.comwr ote in message
news:%2******* *********@TK2MS FTNGP02.phx.gbl ...

>>Thanks Willy.

Your VBScript code checks the registry I think. I can check the regisry
from my Console App, but if .NET is not is not installed then the same
problem exists?

Is this Catch 22?

Exactly, you can't use a .NET program to check whether .NET is installed.
You need unmanaged code, and the easiest that comes to mind is a simple
script (vbscript, jscript), Windows comes with the scripting engines
installed by default.
Willy.

[Brian Stoop]

Thanks, but I need a wrapper free solution.

I appreciate your help, B

"Willy Denoyette [MVP]" <wi************ *@telenet.bewro te in message
news:%2******** ********@TK2MSF TNGP06.phx.gbl. ..

No need to write two applications, say you have a console application
"someapp.ex e", then you can simply make a command line script like this:

@rem startapp.cmd
@Echo off
Set Version="HKLM\S OFTWARE\Microso ft\NET Framework Setup\NDP\v2.0. 50727"
reg query %version% /v Version >nul 2>nul
if not %errorlevel% == 0 (
Echo No such .Net version: %Version%
goto :end
)
someapp.exe
:end

Willy.

"Brian Stoop" <b.*****@consul tant-spam.free.comwr ote in message
news:%2******** ************@TK 2MSFTNGP06.phx. gbl...

>Its Catch 22 then. My app uses Managed code, and I dont wish to have 2
applications .

Thanks to everyone, B
"Willy Denoyette [MVP]" <wi************ *@telenet.bewro te in message
news:ek******* *******@TK2MSFT NGP02.phx.gbl.. .

>>"Brian Stoop" <b.*****@consul tant-spam.free.comwr ote in message
news:%2****** **********@TK2M SFTNGP02.phx.gb l...
Thanks Willy.

Your VBScript code checks the registry I think. I can check the regisry
from my Console App, but if .NET is not is not installed then the same
problem exists?

Is this Catch 22?
Exactly, you can't use a .NET program to check whether .NET is
installed. You need unmanaged code, and the easiest that comes to mind
is a simple script (vbscript, jscript), Windows comes with the scripting
engines installed by default.
Willy.