Revit 2021 DisplayUnitType

[stephen_harrison]

I hope someone can help but I am struggling to update a section of my code I have been utilising for a few years now but due to it being deprecated in Revit 2021 I need to update it.

I have read the few posts I have found on the subject as well as the Revit SDK Revit Platform API Changes and Additions but I feel as though I am having a senior moment and missing the obvious:

My code snippet is:

case StorageType.Double:

double? nullable = t.AsDouble(fp);

if (nullable.HasValue)

{

DisplayUnitType displayUnitType = fp.DisplayUnitType;

value = UnitUtils.ConvertFromInternalUnits(nullable.Value, displayUnitType).ToString();

break;

} 

Note 

t = FamilyType and fp = FamilyParameter

Any assistance would be appreciated in order to hopefully put an end to my senior moment!!

Thank you in advance.

[jeremytammik]

I have heard that expression several times recently... 'senior moment'.

I just looked it up, and apparently the first know usage is from 1996:

https://www.merriam-webster.com/dictionary/senior%20moment

I was not aware of it until just recently...

Anyway, maybe this post will help:

https://forums.autodesk.com/t5/revit-api-forum/forgetypeid-how-to-use/m-p/9455305

Please let us know, and also how you end up migrating your code to eliminate the deprecated API use.

Thank you!

Cheers

Jeremy

[stephen_harrison]

Thank you Jeremy for your prompt response.

You obviously haven't got to that stage in life were senior moments become such a regular occurrence that you start to question how you manage to do anything in the first place!

I regret I have read that post and a few others several times and still cannot see what should be a very obvious solution?

[jeremytammik]

Not quite, but I'm getting there and working on it.

I'll take a look at The Building Coder samples... there may be a similar migration required there...

[jeremytammik]

Yes indeed:

https://thebuildingcoder.typepad.com/blog/2020/04/2021-migration-add-in-language-and-bim360-login.ht...

https://thebuildingcoder.typepad.com/files/tbc_samples_2021_migr_01.txt

CmdDutAbbreviation.cs(37,33,37,48): warning CS0618: 'DisplayUnitType' is obsolete: 'This enumeration is deprecated in Revit 2021 and may be removed in a future version of Revit. Please use the `ForgeTypeId` class instead. Use constant members of the `UnitTypeId` class to replace uses of specific values of this enumeration.'

I'll take a look anon...

[stephen_harrison]

Thanks Jeremy

Ill keep working on this but look forward to your solution.

Regards

Stephen

[stephen_harrison · Accepted solution]

Senior Moment over, thankfully.

Very embarrassing however how simple the solution was!!

//Pre 2021
                        DisplayUnitType displayUnitType = fp.DisplayUnitType;
                        value = UnitUtils.ConvertFromInternalUnits(nullable.Value, displayUnitType).ToString();
                        //2021
                        ForgeTypeId forgeTypeId = fp.GetUnitTypeId();
                        value = UnitUtils.ConvertFromInternalUnits(nullable.Value, forgeTypeId).ToString();

Regards

Stephen

[jeremytammik]

Congratulations on resolving this and thank you for sharing the simple solution.

That motivates me to take a look at the deprecated unit API usage warnings generated by The Building Coder samples...

[jeremytammik]

I did it the easy way, commenting out everything that looked complicated, and just handling the trivial cases:

Eliminated deprecated API usage warnings by removing calls to pre-ForgeTypeId unit functionality:

https://github.com/jeremytammik/the_building_coder_samples/compare/2021.0.150.5...2021.0.150.6