C# CAD 二次开发 多边形角度

C# CAD二次开发中，获取多边形的角度可以使用尺寸标注类中的转角标注(rotateddimension)。通过选择多边形的边界线，然后使用代码中的GetSelection方法获取选中的尺寸标注对象。在循环中，可以通过RotatedDimension对象的Measurement属性获取每个角度的数值。以下是一个获取多边形角度的示例代码：

public void GetPolygonAngles()
{
    Database db = HostApplicationServices.WorkingDatabase;
    Document doc = Application.DocumentManager.MdiActiveDocument;
    Editor ed = doc.Editor;

    using (Transaction trans = db.TransactionManager.StartTransaction())
    {
        var selectedDimensions = from dim in db.GetSelection<RotatedDimension>()
                                 where dim.ColorIndex >= 0
                                 select dim;

        foreach (RotatedDimension dimension in selectedDimensions)
        {
            double angle = dimension.Measurement;
            Application.ShowAlertDialog("角度: " + angle.ToString());
        }

        trans.Commit();
    }
}

这段代码将获取选中的转角标注对象，并循环输出每个转角标注的角度。请注意，你需要在你的项目中引用相应的命名空间和CAD开发库。<em>1</em><em>2</em><em>3</em>
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