Call Wolfram Mathematica code from ArcGIS Pro add-in with C#

MattiasWesterberg — Fri, 21 Apr 2023 06:57:58 GMT

Hi,

I am trying to make a Wolfram Mathematica call from an ArcGIS Pro add-in with C# like this:

using ArcGIS.Desktop.Framework.Contracts; using System; using System.Diagnostics; using Wolfram.NETLink; namespace MyAddIn { internal class MathematicaButton : Button { protected override void OnClick() { try { IKernelLink ml = MathLinkFactory.CreateKernelLink(); ml.WaitAndDiscardAnswer(); ml.Evaluate("2+2"); ml.WaitForAnswer(); int intResult = ml.GetInteger(); ml.Close(); ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show("2 + 2 = " + intResult); } catch (Exception ex) { Debug.WriteLine(ex.StackTrace); ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show(ex.StackTrace); } } } }

I have included ml64i4.dll and Wolfram.NETLink.dll in my project.

When I run my add-in code I get this exception:

Exception thrown: 'System.TypeInitializationException' in Wolfram.NETLink.dll
at Wolfram.NETLink.Internal.NativeLink..ctor(String cmdLine)
at Wolfram.NETLink.MathLinkFactory.CreateKernelLink()
at MyAddIn.MathematicaButton.OnClick() in C:\Users\matti\Desktop\ArcGIS_Pro_add_in\MyAddIn\MathematicaButton.cs:line 14

Line 14 is:
IKernelLink ml = MathLinkFactory.CreateKernelLink();

If I run the same code in a console application it is working.
So my question is, what am I missing or doing wrong in the ArcGIS Pro add-in project?

Regards,
Mattias

Re: Call Wolfram Mathematica code from ArcGIS Pro add-in with C#

mahj — Thu, 04 May 2023 15:41:46 GMT

Hi Mathias,

Have you tried right-clicking on the included ml64i4.dll file in Visual Studio and set Build Action to Content and Copy to Output Directory to Copy always (or Copy if newer)?

Best Regards,

/Markus

Re: Call Wolfram Mathematica code from ArcGIS Pro add-in with C#

MattiasWesterberg — Tue, 09 May 2023 11:19:43 GMT

Yes. But it is still not working.

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Call Wolfram Mathematica code from ArcGIS Pro add-in with C#

Re: Call Wolfram Mathematica code from ArcGIS Pro add-in with C#

Re: Call Wolfram Mathematica code from ArcGIS Pro add-in with C#