how to list serial ports in my pc in ASP.NET which has uploaded to the website ?

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hi huys,

how to list serial ports in my pc in ASP.NET which has uploaded to the website ?

when i tried

string[] ports = SerialPort.GetPortNames();

foreach (string item in ports)
{
ListBox1.Items.Add(item);
}

this just list ports listed on the server of website..

Posted 11-Mar-13 3:05am

beratxt

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Keith Barrow 11-Mar-13 9:13am

It will: the code is running on the server so it gets the ports on the server. You will need to investigate how to do this on the client side. I Googled "Javascript list serial ports" and got several promising results (this isn't something I've ever had to do- and why I haven't added an answer). It looks like JavaScript won't do this out of the box (a good thing in my view, it seems a bit of a security risk), but there is activeX that seems to do what you want.
It seems a pretty unusual thing to want to do however.

beratxt 11-Mar-13 9:26am

can u give an example forcreatihg activeX ? how can i do it basically?

thanx for helping..

Keith Barrow 11-Mar-13 9:27am

I really can't help much more, as I said I've not done this sort of thing before.
See Original Griff's reply. Th activeX solution only works in IE, and even then only if activeX is turned on. Personally, I think what you are doing has a "bad smell" about it (i.e. why would you want to list these port in a website, it feels like there is probably something wrong with the design if you are trying to do this) and is probably more suited to a full desktop application

[no name] 11-Mar-13 9:14am

You would have to write some client side code to get that information.

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OriginalGriff · Answer 1 · 2013-03-11T03:14:00

You can't. Or at least, you can't in 99% of circumstances.

C# code runs on teh server only - so it will alwasy report the server capabilities - it cannot access the client hardware for security reasons.

The only way to do it is to run software on the client PC to enumerate the ports - and you can't do that from the server very easily. The "normal" way to do something like this would be to create an ActiveX control, but there are a few problems with this approach:
1) They only work with IE
2) Even when the client is running IE, ActiveX controls are turned off by default.

If this is just a general "it'd be nice to do this" then drop it - it just isn't worth the time and trouble it will give you to get any generic solution running. And any website which asked me to "please run this software I am sending you" would go straight on my black list of banned sites.