C# BuiltInParameter类代码示例

 /// <summary>
 /// Convert FilterRule to our custom FilterRuleBuilder which will be displayed in form controls  
 /// </summary>
 /// <param name="param">Parameter to which the FilterRule is applied.</param>
 /// <param name="rule">FilterRule to be converted.</param>
 /// <returns>Custom FilterRuleBuilder data converted from FilterRule</returns>
 public static FilterRuleBuilder CreateFilterRuleBuilder(BuiltInParameter param, FilterRule rule)
 {
     // Maybe FilterRule is inverse rule, we need to find its inner rule(FilterValueRule)
     // Note that the rule may be inversed more than once.
     bool inverted = false;
     FilterRule innerRule = ReflectToInnerRule(rule, out inverted);
     if (innerRule is FilterStringRule)
     {
         FilterStringRule strRule = innerRule as FilterStringRule;
         FilterStringRuleEvaluator evaluator = strRule.GetEvaluator();
         return new FilterRuleBuilder(param, GetEvaluatorCriteriaName(evaluator, inverted), strRule.RuleString, strRule.CaseSensitive);
     }
     else if (innerRule is FilterDoubleRule)
     {
         FilterDoubleRule dbRule = innerRule as FilterDoubleRule;
         FilterNumericRuleEvaluator evaluator = dbRule.GetEvaluator();
         return new FilterRuleBuilder(param, GetEvaluatorCriteriaName(evaluator, inverted), dbRule.RuleValue, dbRule.Epsilon);
     }
     else if (innerRule is FilterIntegerRule)
     {
         FilterIntegerRule intRule = innerRule as FilterIntegerRule;
         FilterNumericRuleEvaluator evaluator = intRule.GetEvaluator();
         return new FilterRuleBuilder(param, GetEvaluatorCriteriaName(evaluator, inverted), intRule.RuleValue);
     }
     else if (innerRule is FilterElementIdRule)
     {
         FilterElementIdRule idRule = innerRule as FilterElementIdRule;
         FilterNumericRuleEvaluator evaluator = idRule.GetEvaluator();
         return new FilterRuleBuilder(param, GetEvaluatorCriteriaName(evaluator, inverted), idRule.RuleValue);
     }
     //
     // for other rule, not supported yet
     throw new System.NotImplementedException("The filter rule is not recognizable and supported yet!");
 }

        public ParameterData(
            BuiltInParameter bip,
            Parameter parameter,
            string valueStringOrElementDescription,
            bool containedInCollection,
            /*
            * Edited by Chekalin Victor 13.12.2012
            */
            string parameterName)
        {
            _enum = bip;
            _parameter = parameter;
            /*
             * Edited by Chekalin Victor 13.12.2012
             */
            _parameterName = parameterName;

            ValueString = valueStringOrElementDescription;
            Value = GetValue;

            Definition d = _parameter.Definition;

            ParameterGroup = d.ParameterGroup.ToString();
            GroupName = LabelUtils.GetLabelFor(d.ParameterGroup);
            ContainedInCollection = containedInCollection ? "Y" : "N";
        }

        /// <summary>
        /// set certain parameter of given element to int value
        /// </summary>
        /// <param name="elem">given element</param>
        /// <param name="paraIndex">BuiltInParameter</param>
        /// <param name="value"></param>
        /// <returns></returns>
        public static bool SetParaInt(Element elem, BuiltInParameter paraIndex, int value)
        {
            Parameter para = elem.get_Parameter(paraIndex);
            if (null == para)
            {
                return false;
            }

            para.Set(value);
            return true;
        }

        /// <summary>
        /// Create a Frequency measure property from the element's or type's parameter.
        /// </summary>
        /// <param name="file">The IFC file.</param>
        /// <param name="exporterIFC">The ExporterIFC.</param>
        /// <param name="elem">The Element.</param>
        /// <param name="revitParameterName">The name of the parameter.</param>
        /// <param name="revitBuiltInParam">The built in parameter to use, if revitParameterName isn't found.</param>
        /// <param name="ifcPropertyName">The name of the property.</param>
        /// <param name="valueType">The value type of the property.</param>
        /// <returns>The created property handle.</returns>
        public static IFCAnyHandle CreateFrequencyPropertyFromElementOrSymbol(IFCFile file, ExporterIFC exporterIFC, Element elem,
            string revitParameterName, BuiltInParameter revitBuiltInParam, string ifcPropertyName, PropertyValueType valueType)
        {
            IFCAnyHandle propHnd = CreateFrequencyPropertyFromElement(file, exporterIFC, elem, revitParameterName, ifcPropertyName, valueType);
            if (!IFCAnyHandleUtil.IsNullOrHasNoValue(propHnd))
                return propHnd;

            if (revitBuiltInParam != BuiltInParameter.INVALID)
            {
                string builtInParamName = LabelUtils.GetLabelFor(revitBuiltInParam);
                propHnd = CreateFrequencyPropertyFromElement(file, exporterIFC, elem, builtInParamName, ifcPropertyName, valueType);
                if (!IFCAnyHandleUtil.IsNullOrHasNoValue(propHnd))
                    return propHnd;
            }

            // For Symbol
            Document document = elem.Document;
            ElementId typeId = elem.GetTypeId();
            Element elemType = document.GetElement(typeId);
            if (elemType != null)
                return CreateFrequencyPropertyFromElementOrSymbol(file, exporterIFC, elemType, revitParameterName, revitBuiltInParam, ifcPropertyName, valueType);
            else
                return null;
        }

        /// <summary>
        /// find a parameter according to the parameter's name
        /// </summary>
        /// <param name="element">the host object of the parameter</param>
        /// <param name="paraIndex">parameter index</param>
        /// <param name="value">the value of the parameter with Autodesk.Revit.DB.ElementId type</param>
        /// <returns>if find the parameter return true</returns>
        public static bool SetParameter(Element element, 
          BuiltInParameter paraIndex, ref Autodesk.Revit.DB.ElementId value)
        {
            Parameter parameter = element.get_Parameter(paraIndex);
             if (null == parameter)
             {
            return false;
             }

             if (!parameter.IsReadOnly)
             {
            StorageType parameterType = parameter.StorageType;
            if (StorageType.ElementId != parameterType)
            {
               throw new Exception("The types of value and parameter are different!");
            }
            parameter.Set(value);
            return true;
             }

             return false;
        }

        /// <summary>
        /// Get the room property value according the parameter name
        /// </summary>
        /// <param name="activeDoc">Current active document.</param>
        /// <param name="room">an instance of room class</param>
        /// <param name="paraEnum">the parameter used to get parameter value</param>
        /// <param name="useValue">convert parameter to value type or not.
        /// if true, the value of parameter will be with unit.
        /// if false, the value of parameter will be without unit.</param>
        /// <returns>the string value of property specified by shared parameter</returns>
        public static String GetProperty(Document activeDoc, Room room, BuiltInParameter paraEnum, bool useValue)
        {
            String propertyValue = null;  //the value of parameter

            // Assuming the build in parameter is legal for room.
            // if the room is not placed, some properties are not available, i.g. Level name, Area ...
            // trying to retrieve them will throw exception;
            // however some parameters are available, e.g.: name, number
            Parameter param;
            try
            {
                param = room.get_Parameter(paraEnum);
            }
            catch (Exception)
            {
                // throwing exception for this parameter is acceptable if it's a unplaced room
                if (null == room.Location)
                {
                    propertyValue = "Not Placed";
                    return propertyValue;
                }
                else
                {
                    throw new Exception("Illegal built in parameter.");
                }
            }

            // get the parameter via the built in parameter
            if (null == param)
            {
                return "";
            }

            // get the parameter's storage type and convert parameter to string
            StorageType storageType = param.StorageType;
            switch (storageType)
            {
                case StorageType.Integer:
                    int iVal = param.AsInteger();
                    propertyValue = iVal.ToString();
                    break;
                case StorageType.String:
                    propertyValue = param.AsString();
                    break;
                case StorageType.Double:
                    // AsValueString will make the return string with unit, it's appreciated.
                    if (useValue)
                    {
                        propertyValue = param.AsValueString();
                    }
                    else
                    {
                        propertyValue = param.AsDouble().ToString();
                    }
                    break;
                case StorageType.ElementId:
                    Autodesk.Revit.DB.ElementId elemId = param.AsElementId();
                    Element elem = activeDoc.get_Element(elemId);
                    propertyValue = elem.Name;
                    break;
                default:
                    propertyValue = param.AsString();
                    break;
            }

            return propertyValue;
        }

 private void SetGUIDParameter(Element element, BuiltInParameter builtInParameter, string guidValue)
 {
     Parameter parameter = element.get_Parameter(builtInParameter);
     if (parameter != null && parameter.HasValue && parameter.StorageType == StorageType.String)
     {
         parameter.SetValueString(guidValue);
     }
     else
     {
         ElementId parameterId = new ElementId(builtInParameter);
         ExporterIFCUtils.AddValueString(element, parameterId, guidValue);
     }
 }

        /// <summary>
        /// Gets element id value from parameter of an element or its element type.
        /// </summary>
        /// <param name="element">The element.</param>
        /// <param name="builtInParameter">The built in parameter.</param>
        /// <param name="propertyValue">The output property value.</param>
        /// <returns>The parameter, or null if not found.</returns>
        public static Parameter GetElementIdValueFromElementOrSymbol(Element element, BuiltInParameter builtInParameter, out ElementId propertyValue)
        {
            Parameter parameter = GetElementIdValueFromElement(element, builtInParameter, out propertyValue);
            if (parameter != null)
                return parameter;

            Document document = element.Document;
            ElementId typeId = element.GetTypeId();

            Element elemType = document.GetElement(typeId);
            if (elemType != null)
                return GetElementIdValueFromElement(elemType, builtInParameter, out propertyValue);
            
            return null;
        }

        /// <summary>
        /// Sets string value of a built-in parameter of an element.
        /// </summary>
        /// <param name="element">The element.</param>
        /// <param name="builtInParameter">The built-in parameter.</param>
        /// <param name="propertyValue">The property value.</param>
        /// <exception cref="System.ArgumentNullException">Thrown when element is null.</exception>
        /// <exception cref="System.ArgumentException">Thrown when builtInParameter in invalid.</exception>
        public static void SetStringParameter(Element element, BuiltInParameter builtInParameter, string propertyValue)
        {
            if (element == null)
                throw new ArgumentNullException("element");

            if (builtInParameter == BuiltInParameter.INVALID)
                throw new ArgumentException("BuiltInParameter is INVALID", "builtInParameter");

            Parameter parameter = element.get_Parameter(builtInParameter);
            if (parameter != null && parameter.HasValue && parameter.StorageType == StorageType.String)
            {
                parameter.SetValueString(propertyValue);
                return;
            }

            ElementId parameterId = new ElementId(builtInParameter);
            ExporterIFCUtils.AddValueString(element, parameterId, propertyValue);
        }

        /// <summary>
        /// Gets string value from built-in parameter of an element.
        /// </summary>
        /// <param name="element">The element.</param>
        /// <param name="builtInParameter">The built-in parameter.</param>
        /// <param name="propertyValue">The output property value.</param>
        /// <exception cref="System.ArgumentNullException">Thrown when element is null.</exception>
        /// <exception cref="System.ArgumentException">Thrown when builtInParameter in invalid.</exception>
        /// <returns>The parameter, or null if not found.</returns>
        public static Parameter GetStringValueFromElement(Element element, BuiltInParameter builtInParameter, out string propertyValue)
        {
            if (element == null)
                throw new ArgumentNullException("element");

            if (builtInParameter == BuiltInParameter.INVALID)
                throw new ArgumentException("BuiltInParameter is INVALID", "builtInParameter");

            propertyValue = String.Empty;

            Parameter parameter = element.get_Parameter(builtInParameter);
            if (parameter != null && parameter.HasValue)
            {
                switch (parameter.StorageType)
                {
                    case StorageType.Double:
                        propertyValue = parameter.AsDouble().ToString();
                        return parameter;
                    case StorageType.Integer:
                        propertyValue = parameter.AsInteger().ToString();
                        return parameter;
                    case StorageType.String:
                        propertyValue = parameter.AsString();
                        return parameter;
                    case StorageType.ElementId:
                        propertyValue = PropertyUtil.ElementIdParameterAsString(parameter);
                        return parameter;
                }
            }

            return null;
        }

 /// <summary>
 /// Check to see if rule for this parameter exists or not
 /// </summary>
 /// <param name="param">Parameter to be checked.</param>
 /// <returns>True if this parameter already has filter rule, otherwise false.</returns>
 bool ParameterAlreadyExist(BuiltInParameter param)
 {
     if (m_currentFilterData == null || m_currentFilterData.RuleData.Count == 0)
         return false;
     for (int ruleNo = 0; ruleNo < m_currentFilterData.RuleData.Count; ruleNo++)
     {
         if (m_currentFilterData.RuleData[ruleNo].Parameter == param)
             return true;
     }
     return false;
 }

 /// <summary>
 /// Create FilterRuleBuilder for double FilterRule
 /// </summary>
 /// <param name="param">Parameter of FilterRule.</param>
 /// <param name="ruleCriteria">Rule criteria.</param>
 /// <param name="ruleValue">Rule value.</param>
 /// <param name="tolerance">Epsilon for double values comparison.</param>
 public FilterRuleBuilder(BuiltInParameter param, String ruleCriteria, double ruleValue, double tolearance)
 {
     InitializeMemebers();
     //
     // set data with specified values
     ParamType = StorageType.Double;
     Parameter = param;
     RuleCriteria = ruleCriteria;
     RuleValue = ruleValue.ToString();
     Epsilon = tolearance;
 }

 /// <summary>
 /// set parameter whose storage type is double
 /// </summary>
 /// <param name="elem">Element has parameter</param>
 /// <param name="builtInPara">BuiltInParameter to find parameter</param>
 /// <param name="value">value to set</param>
 /// <returns>is successful</returns>
 private bool SetParameter(ModelElement elem, 
     BuiltInParameter builtInPara, double value)
 {
     Parameter para = elem.get_Parameter(builtInPara);
     if (null != para && para.StorageType == StorageType.Double && !para.IsReadOnly)
     {
        var result = para.Set(value);
        return result;
     }
     return false;
 }

        /// <summary>
        /// Create a positive length property from the element's or type's parameter.
        /// </summary>
        /// <param name="file">The IFC file.</param>
        /// <param name="exporterIFC">The ExporterIFC.</param>
        /// <param name="elem">The Element.</param>
        /// <param name="revitParameterName">The name of the parameter.</param>
        /// <param name="revitBuiltInParam">The optional built-in parameter.</param>
        /// <param name="ifcPropertyName">The name of the property.</param>
        /// <param name="valueType">The value type of the property.</param>
        /// <returns>The created property handle.</returns>
        public static IFCAnyHandle CreatePositiveLengthMeasurePropertyFromElementOrSymbol(IFCFile file, ExporterIFC exporterIFC, Element elem,
            string revitParameterName, BuiltInParameter revitBuiltInParam, string ifcPropertyName, PropertyValueType valueType)
        {
            double propertyValue;
            if (ParameterUtil.GetDoubleValueFromElement(elem, revitParameterName, out propertyValue))
            {
                propertyValue *= exporterIFC.LinearScale;
                return CreatePositiveLengthMeasureProperty(file, ifcPropertyName, propertyValue, valueType);
            }

            if (revitBuiltInParam != BuiltInParameter.INVALID)
            {
                string builtInParamName = LabelUtils.GetLabelFor(revitBuiltInParam);
                IFCAnyHandle propHnd = CreatePositiveLengthMeasurePropertyFromElement(file, exporterIFC, elem, builtInParamName, ifcPropertyName, valueType);
                if (!IFCAnyHandleUtil.IsNullOrHasNoValue(propHnd))
                    return propHnd;
            }

            // For Symbol
            Document document = elem.Document;
            ElementId typeId = elem.GetTypeId();
            Element elemType = document.GetElement(typeId);
            if (elemType != null)
                return CreatePositiveLengthMeasurePropertyFromElement(file, exporterIFC, elemType, revitParameterName, ifcPropertyName, valueType);
            else
                return null;
        }

        /// <summary>
        /// get the room property and Department property according the property name
        /// </summary>
        /// <param name="room">a instance of room class</param>
        /// <param name="paraEnum">the property name</param>
        public String GetProperty(Room room, BuiltInParameter paraEnum)
        {
            String propertyValue = null;  //the value of parameter

            // get the parameter via the parameterId
            Parameter param = room.get_Parameter(paraEnum);
            if (null == param)
            {
                return "";
            }
            // get the parameter's storage type
            StorageType storageType = param.StorageType;
            switch (storageType)
            {
                case StorageType.Integer:
                    int iVal = param.AsInteger();
                    propertyValue = iVal.ToString();
                    break;
                case StorageType.String:
                    String stringVal = param.AsString();
                    propertyValue = stringVal;
                    break;
                case StorageType.Double:
                    Double dVal = param.AsDouble();
                    dVal = Math.Round(dVal, 2);
                    propertyValue = dVal.ToString();
                    break;
                default:
                    break;
            }
            return propertyValue;
        }