Calling dll method from C#

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3.67/5 (3 votes)

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Hello, I have this method at c#.
Which is the right way to call it?

C#

[System.Runtime.InteropServices.DllImportAttribute("QCamDriver.dll",CallingConvention=CallingConvention.StdCall,EntryPoint = "QCam_ListCameras")]
            public static extern QCam_Err QCam_ListCameras(ref QCam_CamListItem pList, ref uint pNumberInList);

Posted 18-Mar-13 2:57am

GustavoUgioni

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ZurdoDev 18-Mar-13 8:58am

Have you tested it? Does it work?

GustavoUgioni 18-Mar-13 9:02am

I have not tested yet, but just because I don't know how to call it on a proper way.

CHill60 18-Mar-13 9:09am

For infomation - If you use the Reply link next to someone's comment it will automatically let them know that you have responded. It doesn't do this if you just add another comment to your own question

GustavoUgioni 18-Mar-13 9:19am

Right, thanks.

[no name] 18-Mar-13 9:17am

If you have not tested it, how do you know that it does not work?

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Menon Santosh · Accepted Answer · 2013-03-18T03:26:00

Solution 1

if you are calling the managed code then

 Assembly SampleAssembly = Assembly.LoadFrom(filename);
Type myType = SampleAssembly.GetTypes()[0];
MethodInfo Method = myType.GetMethod("myVoid");
object myInstance = Activator.CreateInstance(myType);
Method.Invoke(myInstance, null);

and if you are calling unmanaged code then

Calling methods from Dll compiled in 'C' from C#[^]

Posted 18-Mar-13 3:26am

Menon Santosh

Comments

[no name] 18-Mar-13 10:51am

+5

Menon Santosh 19-Mar-13 0:49am

Thanks :)