How to create image as parameter in a family

[Anonymous]

Hi everyone,

I am trying to add a new parameter to a family, in order to get that I do this 

 var familySymbol = (FamilySymbol)annotation.ToList()?.First();
            var famDoc = this._uiDocument.Document.EditFamily(family.Family);
            using (var trans = new Transaction(famDoc))
            {
                trans.Start("Adding parameter");
                var parameterType = ParameterType.Image; 
                famDoc.FamilyManager.AddParameter("Symbol image", BuiltInParameterGroup.INVALID, parameterType,
                    true);
                trans.Commit();
            }

But a error occurs,  "Instance parameter of image type is not allowed."

Can I add a image as a parameter using Revit Api?

[RPTHOMAS108 · Accepted solution]

The message is telling you that parameter types of ParameterType.Image can only be used for Type parameters, this is the same as in the UI. Therefore:

.AddParameter("Image 1", BuiltInParameterGroup.INVALID, ParameterType.Image, False)

Will work.

.AddParameter("Image 1", BuiltInParameterGroup.INVALID, ParameterType.Image, True)

Will not work.