C# and serial port access

[Guest_imported]

How can I access the serial ports with C#?

I've tried opening the filestream class with no luck.

There is a create file method under the Microsoft.Win32 namespace but i'ts a private method of nativecalls.

I don't want to create an object with C++ for serial IO.

 

[jonelf]

I recently was looking for the same thing and found:

http://216.239.35.100/search?q=cach...om/code/SerialIO/Serial.asp+serialio+c#&hl=sv

I haven't tested it though.

 

[leaf]

jonelf,

I checked your link, and it no longer exist. I was wondering if you by chance have a copy of the code from that link that you can post. I can not find anything on C# and Serial I/O

 

[dlunday]

This one seems to work and be clear on the subject

http://www.devhood.com/tutorials/tutorial_details.aspx?tutorial_id=320

I'm going through the same thing, so perhaps we can commisurate here.

 

[Guest_imported]

This can be easily by using the CreateFile method found in kernel32.dll however it seems as though you want to do it in VB.NET and I am not sure if unsafe code sections are allowed in VB.NET. Here is the C# code though.

using System.Runtime.InteropServices;

put this next part as a member in your class


[DllImport("kernel32", SetLastError=true)]
static extern unsafe int CreateFile(
string filename,
uint desiredAccess,
uint shareMode,
uint attributes, // really SecurityAttributes pointer
uint creationDisposition,
uint flagsAndAttributes,
uint templateFile);

const uint GENERIC_READ = 0x80000000;
const uint OPEN_EXISTING = 3;


int handle = CreateFile("COM1", GENERIC_READ, 0, 0, OPEN_EXISTING, 0, 0);

if(handle != -1)
{
FileStream myStream = new FileStream(new IntPtr(handle), FileAccess.ReadWrite, true);
//do stuff with the port
}

Hope this helps you out!

 

[CodeForALiving]

If you don't have access to the OCX from VB then this URL may help. It's a serial driver written in VB.NET.

I have made a DLL from it using Visual Studio and C sharp can use it. Haven't tested it fully, yet, but it looks promising.

http://www.freevbcode.com/ShowCode.Asp?ID=4666