I am going to update my Revit parameter using " Element.SetParameterByName" node. I read and extracted the value from an external database through Dynamo, but as you say in the attached image, it was string. Therefore, I used “String to Number” to convert the string to a number. But as you see when I connect “String to Number” 's output (number) to " Element.SetParameterByName" node, it gives me error. It doesn’t work. Could anyone help me please? Since for establishing some conditions in my Revit model by Dynamo in the later steps, all string type values need to be converted into the number, otherwise the condition statements will not work. Your help is kindly appreciated in advance. Thanx
Thanks for your response.
The conditions stated in the following script written by @jacob.small do not work. It seems that since the values are string here, Revit cannot recognize them.
Correct. The values need to be numbers for the check. But are they numbers or strings when you get them from GetParameterValueByName? You’re getting the value of Humidity and setting it again right?
I got these values from MySQL database, assign them to an object in revit, then got these values using “Element.GetParameterValueByName” and assign it to its corresponding room.
Your very first image shows SetParameterByName with a warning. Can you show us what the warning is?
Also, put an Object.Type node after one of the GetParameterValueByName nodes and show us what the output is.
So it’s most likely a string. You’ll have to convert the string to a number to run the check but convert it back to a string when you set the parameter again.
Or better yet, delete the parameter and recreate it as a number based parameter. Storing numbers as strings is bad practice in general as you can’t use them natively in Revit, nor effectively in Dynamo.
I didn’t exactly understand what you said. If I used string.ToNumber that you said it is correct, it doesn’t work when I connect it to Element.SetParameterByName. Could you please show me an example in Dynamo? Thanx
Your Humidity parameter takes a string input. You have to convert it to a number in order to run your checks. When you set the humidity parameter again it needs to be a string. I don’t know where you’re getting the parameter value from but I assume it’s an output from the humidity checks. You need to convert that value to a string before setting your parameter again.
Thanks again @jacob.small for your response. How can we create a number-based parameter in Dynamo? As seen in the attached image, everything started from reading a list of values from MySQL database table. Then get the maximum the value of the list and … You mean that I have to delete all these nodes?
I have the same problem, different graph, of course. I get the yellow error message “The parameter’s storage type is not a string.” The family is expecting a number and the upstream nodes are providing a set of numbers. How do I feed numbers to the family parameter?
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String.ToNumber node as indicated above. If that doesn’t solve the problem for you please start a new post providing the .dyn and a small sample rvt file to reproduce the error.
