Revit二次开发-为构件添加参数

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB;
using Autodesk.Revit.ApplicationServices;

namespace AddParameter
{
    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
    [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
    public class Command : IExternalCommand
    {
        Document _doc;
        UIDocument _uidoc;
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {

            UIDocument uidoc = commandData.Application.ActiveUIDocument;
            Document doc = uidoc.Document;
            _doc = doc;
            _uidoc = uidoc;

            var refe = uidoc.Selection.PickObject(Autodesk.Revit.UI.Selection.ObjectType.Element, "Please select element");
            Element selectedElement = doc.GetElement(refe) as Element;

            string shapeFile = @"E:【学习】MyRevitSDKSampleAddParameterParameter" + "\RevitParameters.txt";
            this._doc.Application.SharedParametersFilename = shapeFile;

            Transaction trans = new Transaction(doc, "CreatSharedParams");
            trans.Start();
            CreatShareParam("C自定义参数_1", ParameterType.Text, false, BuiltInParameterGroup.PG_TEXT, selectedElement);
            SetParamValue("C自定义参数_1", "我开发了很多Revit插件和功能", selectedElement);
            trans.Commit();
            return Result.Succeeded;

            
        }
        public bool CreatShareParam(string parameterName, ParameterType parameterType, bool canModify, BuiltInParameterGroup parameterGroup, Element element)
        {
            if (element.Category == null)
            {
                return false;
            }
            try
            {
                Application app = this._doc.Application;
                DefinitionFile dfile = app.OpenSharedParameterFile();
                DefinitionGroup dg;
                if (!element.Category.AllowsBoundParameters)
                {
                    return false;
                }
                Category category = element.Category;//选择的元素添加

                Categories cats = _doc.Settings.Categories;//测试绑定所有元素
                dg = dfile.Groups.get_Item("测试共享参数组");
                if(dg==null)
                    dg = dfile.Groups.Create("测试共享参数组");
                
                if (dg != null)
                {
                    ExternalDefinitionCreationOptions edco = new ExternalDefinitionCreationOptions(parameterName, parameterType);
                    edco.UserModifiable = canModify;
                    Definition df;
                    try
                    {
                        df = dg.Definitions.Create(edco);
                    }
                    catch (Exception)
                    {
                        df = dg.Definitions.get_Item(edco.Name);
                    }

                    var instanceBinding = _doc.ParameterBindings.get_Item(df) as InstanceBinding;
                    foreach (Category cat in cats)
                    {
                        if (!cat.AllowsBoundParameters)//判断类别是否允许绑定参数
                            continue;
                        if (instanceBinding != null)
                        {
                            if (!instanceBinding.Categories.Contains(cat))
                            {
                                instanceBinding.Categories.Insert(cat);
                            }


                            _doc.ParameterBindings.ReInsert(df, instanceBinding);
                        }
                        else
                        {
                            Autodesk.Revit.DB.CategorySet categorySet = app.Create.NewCategorySet();
                            categorySet.Insert(cat);

                            instanceBinding = app.Create.NewInstanceBinding(categorySet);

                            _doc.ParameterBindings.Insert(df, instanceBinding);
                        }
                    }
                    //if (instanceBinding != null)
                    //{
                    //    if (!instanceBinding.Categories.Contains(category))
                    //        instanceBinding.Categories.Insert(category);

                    //    _doc.ParameterBindings.ReInsert(df, instanceBinding);
                    //}
                    //else
                    //{
                    //    Autodesk.Revit.DB.CategorySet categorySet = app.Create.NewCategorySet();
                    //    categorySet.Insert(category);

                    //    instanceBinding = app.Create.NewInstanceBinding(categorySet);
                    //    _doc.ParameterBindings.Insert(df, instanceBinding);
                    //}
                }
                return true;
            }
            catch (Exception ex)
            {
                TaskDialog.Show("error in creating parameters：", "name:" + parameterName + "
" + "id:" + element.Id.ToString());
                throw;
            }
        }

        public void SetParamValue(string parameterName, string parameterValue, Element element)
        {
            try
            {
                if (element.LookupParameter(parameterName) != null && element.LookupParameter(parameterName).IsReadOnly == false)
                {
                    element.LookupParameter(parameterName).Set(parameterValue);
                }
            }
            catch (Exception ex)
            {
                TaskDialog.Show("Set Parameter Value Error", ex.ToString());
                return;
            }
        }


    }
}