[Resolved] Detecting If user Has .Net Framwork Installed

SumitGupta

Hi,

My question is simple How to Detect that if the User Has .Net Framework Installed in his system?

drew010

maybe with the php_w32api.dll extension to query for the registry key HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v1.1.4322
or instead of 1.1.4322 you can substitute for the version you want.

bradgrafelman

The 'user' ? You mean the person viewing your website?

if(strstr($_SERVER['HTTP_USER_AGENT'], '.NET') === FALSE) echo 'User does not have .NET installed.'; else echo 'User has .NET installed.';

That's how I would do it. Otherwise, you can't get much information about the user's computer.

SumitGupta

Hi bradgrafelman,

This is how I do it by searching .Net in User Agent. But The Firefox doesn't display the .Net in its User Agent String. So it is Less reliable as this code works only on IE.

Hi drew010,

Can you Explain more about the php_w32api.dll and its usage

bradgrafelman

You can't read the viewer's registry; I believe drew was thinking you wanted to know information on the server side, not client side.

SumitGupta

Hi,

I forget to tell about

The 'user' ? You mean the person viewing your website?

The Answer is Yes.

Actually I have a .Net Framework based game on my site (site is running on LAMP (P-PHP)) Now I want the person who wish to download my game get to know that they have the correct version of .Net Framework with them or not. If it is not than I want to display the link from where they can get it.

Simple.

bradgrafelman

It'd be nice if you could do a quick compatiblity check like this with PHP. The only 3 solutions I see are these:

Check the HTTP_USER_AGENT as mentioned above. If the required .NET version is not found, alert the user that they MAY have to upgrade.
Find some sort of ActiveX control that would allow you to check the registry, or however else you can find the .NET framework version.
Simply tell the user they need .NET Framework version x.xx (replacing x's with correct numbers)

SumitGupta

Hi,

Thanks for Information, But can you explain a bit of your second point about the Activex Control.

Do you mean that I should try to read the activex on End User Machine or I need a ActiveX control on my Server that need to be downloaded at end user and run there...???

Thanks

bradgrafelman

ActiveX controls are things you install on a user's machine to execute. They are widely frowned upon and blocked by most settings and browsers (Windows XP SP2, and most likely FireFox for example), so I'm not sure how well this will work.

drew010

i think it will be too much trouble to determine this and even if you figure a way it will probably be unreliable. i would recommend at this point you just tell the users they must have it, and tell them how to check, and say if they dont have it that the game will not work at all.

SumitGupta

Hi,

Thanks to all. I better stick to the strstr method to deteremine if they have .net in their user agent.

Thanks for your help...🙂