Hi,
We have many C# project and I would like to integrate them in LabVIEW . Each C# projects contains thousands of lines, many classes.
I have found this article very helpful, however it is very basic.
http://erdosmiller.com/blogs/news/6605401-integrating-labview-and-c-1
Using this article I can use a class constructor to call all the methods but I always get object null reference problem in LV. The problem is all these classes are dependent to each other.
As an example :
somewhere in the code I should use the constructor of a class called NIAnalogOutput and then call the methods inside this class
as can be seen below inside the constructor it uses 2 objects from other classes: clsSystemInfo and SystemBusType
If I delete that line and then compile and use the dll file in LV I don't get any error
However if I keep this line in the constructor and compile the code I will get 1172 (null reference error ) in LV
I even tried to call the constructor of these classes and then call NIAnalogOutput but I still get the 1172 error. Could you please help me on this? How can I get rid of the error in this example?
in the attached picture you can see that I call the 2 class constructors (then all pass OK) before callingNIAnalogOutput
but I still get an error from NIAnalogOutput constructor
public NIAnalogOutput(string[] DeviceAndChannelName, double maxVal, double minVal, bool isMaster = false, eNIAOutCalOpt eCalOption = eNIAOutCalOpt.USE_STATIC)
{
this.master = isMaster;
if (eCalOption != eNIAOutCalOpt.NONE)
{
// Go change the niScales to either the static brdOffset values, or immediately measured values
UpdateAnalogOutputBoardOffset(eCalOption);
}
Dictionary<string,List<string>>devicesAndChannels = new Dictionary<string,List<string>>();
List<string> devices = new List<string>();
List<string> tmpChannels;
string[] tmpString;
int key_idx = 0;
NrOfChannels = DeviceAndChannelName.Length;
rNum = new Random(Environment.TickCount);
int chanIndex;
//#if PCI
if (clsSystemInfo.DAQmxInfo.sysBusType == SystemBusType.PCI)
{
SyncSignal = "RTSI5"; //not functional yet!!!
SampleClkSignal = "RTSI4";
GlobalSyncSignal = "RTSI3";
}
}
