Revit开发 - 选择实体（PickObject）

ゞ浴缸里的玫瑰 2022-03-01 11:42 225阅读 0赞

本文演示如何选择Revit文件中的线和面。

### 1.用Revit绘制模型 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70][]

### 2.选择面 ###

示例代码：

using Autodesk.Revit.Attributes;
    using Autodesk.Revit.DB;
    using Autodesk.Revit.UI;
    using Autodesk.Revit.UI.Selection;
    using System.Windows.Forms;
    
    namespace RevitAddin4
    {
        [TransactionAttribute(TransactionMode.Manual)]
        public class RevitAddin : IExternalCommand
        {
            public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
            {
                UIDocument uiDoc = commandData.Application.ActiveUIDocument;
                Document doc = uiDoc.Document;
                Selection selection = uiDoc.Selection;
                Reference reference = selection.PickObject(ObjectType.Face);
                Element element = doc.GetElement(reference);
                object obj =  element.GetGeometryObjectFromReference(reference);
                Face face = obj as Face;
                if (face != null)
                {
                    MessageBox.Show( "被选择面的面积 = "+ face.Area.ToString(), "信息");
                }      
                return Result.Succeeded;
            }
        }
    }

选择**墙**的立面，执行结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70 1][]

选择**柱**的立面，执行结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70 2][]

### 3.选择线 ###

示例代码：

using Autodesk.Revit.DB;
    using Autodesk.Revit.UI;
    using Autodesk.Revit.UI.Selection;
    using System.Windows.Forms;
    
    namespace RevitAddin4
    {
        [TransactionAttribute(TransactionMode.Manual)]
        public class RevitAddin : IExternalCommand
        {
            public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
            {
                UIDocument uiDoc = commandData.Application.ActiveUIDocument;
                Document doc = uiDoc.Document;
                Selection selection = uiDoc.Selection;
                Reference reference = selection.PickObject(ObjectType.Edge);
                Element element = doc.GetElement(reference);
                object obj =  element.GetGeometryObjectFromReference(reference);
                Edge edge = obj as Edge;
                if (edge != null)
                {
                    MessageBox.Show( "被选择线的长度 = "+ edge.ApproximateLength.ToString(), "信息");
                }      
                return Result.Succeeded;
            }
        }
    }

选择**墙**的长度，执行结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70 3][]

选择**柱**的高度，执行结果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70 4][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70]: /images/20220301/01c34110bfc145b0a30449e5d10dfe25.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70 1]: /images/20220301/d4f7799118f44c75b6bf4bc8ba2cbf1e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70 2]: /images/20220301/c85cbad4564d49d886174565617f60df.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70 3]: /images/20220301/82745aad4a804c0e80a6ed912b3fca12.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpeWF6aGVuMjAxMQ_size_16_color_FFFFFF_t_70 4]: /images/20220301/d436260c002f42af9eccc2e1804ecd16.png