Controling a LabVIEW VI from C#

[SeeSharp]

Hello,

I'm writing a C# program that calls LabVIEW  VI's using the ActiveX automation interface.

Getting started was quite straightforward (Load a VI, set/get simple parameters, run VI, etc...), but I could not figure out how to pass "clusters" from my C# program to LabVIEW...

The help for the "VirtualInstrument.call" method mentions a cluster should be treated as an array of variants - any example available?

I also noticed a "LabVIEWTypes" assembly that seems to have been created to allow manipulation of waveform data types was available- Did anyone experimented with this already?

...Any information would be appreciated!

Regards

[SeeSharp]

I could figure it out ...

In .NET, there are no variants anymore - everything derives from "object" and so we need to create an array of object - each object in this array being a "field" of our cluster.

Let's consider a cluster that contains 3 numeric (double), we would control it from C# in the following manner :

//settings cluster [cluster = array of objects] object[] myCluster; //declare settings "cluster"

myCluster =

new object[3];

myCluster

[0] = new double(); //

myCluster

[1] = new double(); //

myCluster

[2] = new double(); // //assign values to settings cluster

myCluster

[0] = 3.14; //

myCluster

[1] = 1.2; //

myCluster

[2] = 2.3; //

//Write value to the LabVIEW cluster

myVI.SetControlValue("<clusterName>", myCluster);

Enjoy...