The example we used can be found under "C:\Program Files\National Instruments\Vision Builder AI 2012\API Examples\dotNET Examples" and the library’s we use are NationalInstruments.VBAI.2008.dll and NationalInstruments.Vision.Common.dll
The basic concept what we do is we have a client and a server application. The client connects to the server and will ask to execute the test that need to be run.
For each vision builder test the client will connect to the server so we create in our case 4 different thread’s that will each handle there own test.
I didn’t post al of the code cause a lot of things are just for handeling error’s or things we need to do but that has nothing to do with the pictures or tests.
public class VisionBuilderTest
{
private VBAIEngine _engine;
public void StartEngine(int id)
{
this._engine = new VBAIEngine("Engine" + id.ToString(), string.Empty, false);
}
public void LoadProgram(string program)
{
this._engine.OpenInspection(program);
}
public void ExecuteTest()
{
this._engine.RunInspectionOnce(-1);
bool newImageAvailable, inspectionStatus;
VBAIDateTime timeStamp;
StepResult[] results = this._engine.GetInspectionResults(out timeStamp, out inspectionStatus);
VisionImage image = this._engine.GetInspectionImage(string.Empty, 1, 1, out newImageAvailable);
image.WriteJpegFile(imageFile.FullName, 100);
while (!imageFile.Exists)
{
Thread.Sleep(50);
}
if (image != null)
{
image.Dispose();
}
}
}
public class Client()
{
private Thread clientThread;
private VisionBuilderLogic _visionBuilderLogic;
private int id;
public Client(int id)
{
this.id = id;
}
public void Start()
{
this._visionBuilderLogic = new VisionBuilderLogic();
this.clientThread = new Thread(new ThreadStart(HandleClient));
this.clientThread.Start();
}
public void HandleClient()
{
try
{
this._networkStream = this._tcpClient.GetStream();
while (true)
{
ASCIIEncoding encoder = new ASCIIEncoding();
byte[] readBuffer = new byte[1024];
int bytesRead = this._networkStream.Read(readBuffer, 0, readBuffer.Length);
this._networkStream.Flush();
string command = encoder.GetString(readBuffer, 0, bytesRead);
_visionBuilderLogic.StartEngine(this.id);
_visionBuilderLogic.LoadProgram(command);
_visionBuilderLogic.ExecuteTest();
}
}
catch (Exception exc)
{
this._logger.ErrorException("Connectie met client verbroken.", exc);
}
finally
{
this._tcpClient.Close();
}
}
}
