How to get Parameter's unit in C#.Net

[gadurai]

Hi,

I am trying to get Parameters value and Units using C#.net.

It is working through VBA and .net.But while i am using C#.net, it is showing meassage that "It is not support by the Langauage".

Can any one suggets m eto get Unit fo Patrameter using C#.net.

*********Code

foreach (Parameter oParam in oParams)
{
// string Str = oParam.Units; //Getting error in this line
Tlist.Add(oParam.Name + "|" + Convert.ToString(oParam.Expression) + "|" +"in");//oParam.Units
}

Regards,

Appadurai.G

[rjay75 · Accepted solution]

In C# I've had to use the get_Units() method instead of the Units property. For some reason the units property can never be found.

string units = oParam.get_Units();

[rjay75]

Also by the way, the Expression property is always a string.

[gadurai]

Hi Rodney ,

Thanks for your Support.

Regards,

Appadurai.G

[LukeDavenport]

Hi Rodney,

I get a 'member not found' exception at runtime when I use Parameter.get_Units(); in C#

I'm using Inventor 2019.4. Any ideas?

Thanks,

Luke

[YuhanZhang]

Hi Luke,

Did you set the reference Autodesk.Inventor.Interop's "Embed Interop Types" to False? Make sure to set this property to False always when you use Inventor API in C#/VB.net, otherwise it may impact some events/methods.

[LukeDavenport]

Thanks for the reply. This didn't solve the problem.

In the end I couldn't get the parameter units using C# despite trying a few different methods, so I had to include some VB code in my C# solution to get the units!

Full solution was as follows:

1) In Visual Studio, create a new VB.net Project (of type Class Library) and add it to the existing C# solution.

2) Add a function to the VB.net class which receives a parameter and returns the unit string.

3) Build the VB.net project.

4) Add a reference to the VB.net project dll to the top of your C# project.

5) Use the VB.net GetParameterUnits function whenever you need.

This worked fine for me.

Hope it helps

Luke

[adam.nagy]

Did you recompile after setting Embed Interop Types to False?

For me too that got rid of the error.

In addition, you could also use a dynamic variable to access the property using late-binding as your VB project does:
https://modthemachine.typepad.com/my_weblog/2021/02/member-not-found-error-in-c-add-in.html 

[oransen]

@rjay75does get_Units still work for you? When I try it (Inventor 2019) it crashes....

[Michael.Navara]

I had the same issue today. I write the fix for C# users. See my GitHub for more info.

https://github.com/CSmichaelnavara/Inventor-Parameter-Units-Fix

[Prashant.Baher]

I am converting vb.net code into c# and face this issue.

Changing dll property gives lots of errors so that is "No-Go" for me.

Adam's reply work for me.

Specially this article's final solution of using 'dynamic' object works perfectly.