Revit二次开发实战03（事务Transaction）

Revit二次开发实战

事务必须首先要启动Start，操作完成后提交事务Commit，如果执行异常，则要执行回滚操作RollBack；

可以通过GetStatus获取事务的当前状态，根据事务状态决定程序的走向；

事务Transaction是非托管对象，必须手动释放Dispose，或者放到using代码块中，让编译器自动释放；

如果要对文档进行修改，则必须使用事务，否则会报错；

 

事务状态的枚举

    public enum TransactionStatus
    {
        Uninitialized = 0,
        Started = 1,
        RolledBack = 2,
        Committed = 3,
        Pending = 4,
        Error = 5,
        Proceed = 6
    }

 

使用事务Transaction将门的底部高度提高0.2米；

事务执行前   事务执行后

源码

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

namespace RevitHello
{
    [Transaction(TransactionMode.Manual)]
    class CTransaction : IExternalCommand
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            //获取document对象
            var uidoc = commandData.Application.ActiveUIDocument;
            var doc = uidoc.Document;
            //获取元素
            var refe = uidoc.Selection.PickObject(ObjectType.Element, new DoorFilter2());
            Element e = doc.GetElement(refe);
            using (Transaction tr=new Transaction(doc,"tr"))
            {
                //开启事务
                tr.Start();
                if (tr.GetStatus() == TransactionStatus.Started) TaskDialog.Show(typeof(CTransaction).Name,"事务开启成功");
                //执行操作
                try
                {
                    Parameter p = e.get_Parameter(BuiltInParameter.INSTANCE_SILL_HEIGHT_PARAM);
                    p.Set(Utils.MM2Foot(200));
                    tr.Commit();
                    if (tr.GetStatus() == TransactionStatus.Committed) TaskDialog.Show(typeof(CTransaction).Name, "事务提交成功");
                }
                catch (Exception)
                {
                    //操作失败，并回滚
                    if (tr.GetStatus() == TransactionStatus.Started)
                    {
                        TaskDialog.Show(typeof(CTransaction).Name, "事务提交失败");
                        tr.RollBack();
                        if (tr.GetStatus()==TransactionStatus.RolledBack)
                        {
                            TaskDialog.Show(typeof(CTransaction).Name, "事务回滚成功");
                        }

                    }
                }
                


            }
           



            return Result.Succeeded;//返回Succeeded，事务内的操作会修改文档
           // return Result.Cancelled;//如果返回Cancelled，则事务内的操作会被撤销
        }


    }
    class DoorFilter2 : ISelectionFilter
    {
        //按照Category进行过滤
        public bool AllowElement(Element elem)
        {
            if (elem.Category.Id.IntegerValue == (int)BuiltInCategory.OST_Doors) return true;
            return false;
        }

        public bool AllowReference(Reference reference, XYZ position)
        {
            return true;
        }
    }
}

自定义工具类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RevitHello
{
    //工具类
    public static   class Utils
    {
        //Revit内部基本单位是英尺
        //1英尺等于0.3047999995367米，等于304.7999995367毫米
        const double MPF = 0.3047999995367;
        const double MMPF = 304.7999995367;

        
        //米转英尺
        public static double Meter2Foot(double meters)=> meters / MPF;
        //毫米转英尺
        public static double MM2Foot(double milimeters)=> milimeters/ MMPF;
        //英尺转米
        public static double Foot2Meter(double foots)=> foots * MPF;
        //英尺转毫米
        public static double Foot2MM(double foots)=> foots * MMPF;


    }
}