查找一个族实例的参数

[c#]代码库

		public string FindParameter(string parameterName, FamilyInstance familyInstanceName)
		{
			ParameterSetIterator i = familyInstanceName.Parameters.ForwardIterator();
			i.Reset();	
            string valueOfParameter = null;
			bool iMoreAttribute = i.MoveNext();	
			while (iMoreAttribute)
			{
				bool isFound = false;
				object o = i.Current;
				Parameter familyAttribute = o as Parameter;
				if (familyAttribute.Definition.Name == parameterName)
				{
                    //find the parameter whose name is same to the given parameter name 
					Autodesk.Revit.DB.StorageType st = familyAttribute.StorageType;
					switch (st)
					{
						//get the storage type
						case (Autodesk.Revit.DB.StorageType.Double):
						{
							if (parameterName == "Angle" )
							{
								//make conversion between degrees and radians
								Double temp = familyAttribute.AsDouble();						
								valueOfParameter = Math.Round(temp * 180/(Math.PI),3).ToString();//+ "'";
							}
							else
							{
								valueOfParameter = familyAttribute.AsDouble().ToString();
							}
							break;
						}
						case (Autodesk.Revit.DB.StorageType.ElementId):
						{
							//get elementId as string 
							valueOfParameter = familyAttribute.AsElementId().ToString();
							break;
						}
						case (Autodesk.Revit.DB.StorageType.Integer):
						{
							//get Integer as string
							valueOfParameter = familyAttribute.AsInteger().ToString();
							break;
						}
						case (Autodesk.Revit.DB.StorageType.String):
						{
							//get string 
							valueOfParameter = familyAttribute.AsString();
							break;
						}
						default:
						{
							break;
						}
					}
				isFound = true;
				}
				if(isFound)
				{
					break;
				}
				iMoreAttribute = i.MoveNext();
			}
            //return the value.
			return valueOfParameter;
		}