topic Re: Could not load type from assembly - ArcGIS Pro SDK for .NET in ArcGIS Pro SDK Questions

Could not load type from assembly - ArcGIS Pro SDK for .NET

NausicaaMontanari — Tue, 23 Apr 2024 07:20:06 GMT

Hello,

I'm creating an Add-In for ArcGIS Pro 3.2.2 with Visual Studio 2022 and .NET 6.0 and ArcGIS Pro SDK for .NET; I'm following the guidelines here: https://github.com/Esri/arcgis-pro-sdk/wiki/ProConcepts-3.0-Migration-Guide#install-pro-and-the-pro-sdk-for-3x

I also created some WCF proxy clients to be able to call web services in SOAP: https://learn.microsoft.com/en-us/dotnet/core/additional-tools/wcf-web-service-reference-guide#how- to-use-the-extension

Everything works if I call my code from a generic executable, but if I call the WCF proxy client from a button of an ArcGIS Pro Add-In I receive the following error: Could not load type 'System.ServiceModel.Channels.IBindingRuntimePreferences' from assembly 'System.ServiceModel.Primitives, Version=4.9.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

In my project I have to use .NET 6.0 but it seems that ArcGIS Pro uses dlls from an older version: 4.9.0.0.

Instead of loading the classes present in the dll: System.ServiceModel.Primitives.dll of my Nuget Package it uses the dll present in: C:\Program Files\ArcGIS\Pro\bin.

This causes me an error during instantiation WCF proxy client to call my web services.

How can I troubleshoot the problem? Is this a bug?

Thanks very much.

Nausica Montanari

Re: Could not load type from assembly - ArcGIS Pro SDK for .NET

UmaHarano — Tue, 23 Apr 2024 16:14:45 GMT

Pro will use the dependencies it needs from its bin location. ArcGIS Pro 3.3 will be available in a few weeks. This version of Pro uses updated System.ServiceModel.Primitives.dll - version 6.200.XXX. Can you please try using Pro 3.3 to see if your addin works correctly.

Re: Could not load type from assembly - ArcGIS Pro SDK for .NET

NausicaaMontanari — Wed, 24 Apr 2024 06:18:11 GMT

Hi,

I hope so and I will wait confidently.

Thanks

Nausica

Re: Could not load type from assembly - ArcGIS Pro SDK for .NET

MarcelŠíp — Thu, 16 May 2024 13:07:01 GMT

Hi @UmaHarano, according to Pro SDK documentation,Pro 3.3 requires .NET 8. So there seems to be the same type of inconsistency between Pro system requirements (.NET 8 ) and system libraries internally loaded by Pro (6.X).

In my opinion this might cause similar problems as with Pro 3.2. What is the reason for library versions in C:\Program Files\ArcGIS\Pro\bin being different from .NET version required by Pro?

Re: Could not load type from assembly - ArcGIS Pro SDK for .NET

mody_buchbinder — Tue, 07 Jan 2025 09:45:33 GMT

Any news on this?

It looks like Pro 3.3 that works with .NET 8 is looking for libraries with version 9

Re: Could not load type from assembly - ArcGIS Pro SDK for .NET

NausicaaMontanari — Tue, 07 Jan 2025 11:30:30 GMT

Hi,

in ArcGIS Pro 3.3.x with .NET 8 everything works.

Nausica