How to get parameter value of selected element

[kellyxsy99]

I want to get parameter values of selected element such as height, lenght, etc...

but, the return was "Autodesk.Revit.DB". I can't find which caused a problem.

Here is my code

Reference reference = uidoc.Selection.PickObject(ObjectType.Element);
			Element element = uidoc.Document.GetElement(reference);

			Parameter foundParameter = null;
			foreach (Parameter parameter in element.Parameters)
            {
				if (parameter.Definition.ParameterType == ParameterType.Length)
                {
					foundParameter = parameter;
					

					using (Transaction tx = new Transaction(doc))
					{
						tx.Start("transaction");
						TaskDialog.Show("title 🙂 ", parameter.ToString());
						tx.Commit();
					}
				}
            }
			
			return Result.Succeeded;

[franciscopossetto · Accepted solution]

Hey, 

You can do it on several ways. Your code is not working because you are not reading the value after get the Parameter. You are just converting an object into a string.

Instead of do this:

parameter.ToString()

Do this:

parameter.AsDouble().ToString();

On this link you can see all methods that can be applied on parameters, such us AsDouble(), AsString(), AsInteger(), etc... this is depending on the type of value your parameter stores. I used AsDouble() because dimensions stores doubles.

https://www.revitapidocs.com/2015/0b04b80d-b318-986e-48cc-835d0dda76e5.htm

To get parameter values, you take a look on the methods LookupParameter() and get_Parameter().

In addition, you do not need to initiate a transaction to get a value.

I hope it helps,

Kind regards.

[kellyxsy99]

Thanks for your reply.

Following your solution, I changed my codes like this.

Parameter parameter1 = element.LookupParameter("Code");
parameter1.AsValueString();

Parameter parameter2 = element.LookupParameter("Length");
parameter2.AsDouble().ToString();

 (element is selected from model. The value type of "Code" is string and "Length" is Double.)

However, Results are still "Autodesk.Revit.DB.Parameter".

How do I solve this problem?

[kellyxsy99]

oh, I solved the problem! thanks a lot.

[a7med_ma7moud]

Hope if you can share the solution, I am facing the same issue

[RPTHOMAS108]

Don't use AsValueString unless the storage type is a value type such as double (was originally for parameters with units). I think it does work for certain other storage types (ElementId) that point to elements but it doesn't work for storage types of string (for such AsString should be used).

Practically I never use AsValueString, the one thing it is good for is formatting the values with units as they are in the UI, that is about it.

So above it could have been used for Length but not Code (which I assume is perhaps a string representing Uniclass etc).