The new security model on framework 2.0 makes it very difficult to access the resources from the local machine. There is a very good kbase article on the subject
http://support.microsoft.com/kb/839300
"How to use the AllowPartiallyTrustedCallers attribute to call an assembly that has a strong name from a Web page by using Visual C# .NET or Visual C# 2005"
Hovever this article does not address the issue of the aquiring the security to access a serial port.
I have tried to decifer the necessary permissions needed in code to adapt the code in this article to no avail.
I suspect it is something like
SecurityPermission
sp = new SecurityPermission(SecurityPermissionFlag.Execution); sp.Assert();but this does not work.
Does anyone any experience or knowlege of how to set the permissions in code to access a serial port from a web browser
Thanks,
PatC
accessing serial port from web page
GunaChinna
And the magic trick IS !!!
After one week and several hundred compile roundtrips ....
Drum roll ....
[SuppressUnmanagedCodeSecurityAttribute()]
put this in the namespace of the class that you are calling from the web page.
Then do a
SecurityPermission sx = new SecurityPermission(SecurityPermissionFlag.UnmanagedCode);
sx.Assert();
you can then access the serial port on the client machine from the browser.
Typical code being ;
serialPort1.PortName = "COM6";
serialPort1.BaudRate = 2400;
serialPort1.Parity = System.IO.Ports.Parity.Even;
serialPort1.DataBits = 7;
serialPort1.StopBits = System.IO.Ports.StopBits.One;
serialPort1.Open();
serialPort1.ReadExisting();
thanks to all who answered my various posts.
PatC