/// <summary>
/// 获取线管所对应的弯头的族文档中，族参数“弯曲半径 = 管件外径 * 15” 后面的数值 15
/// </summary>
/// <param name="conduit"> 线管对象 </param>
/// <returns> </returns>
private double?GetElbowRadiusRatio(Transaction docTrans, Conduit conduit)
{
ConduitType cdType = _doc.GetElement(conduit.GetTypeId()) as ConduitType;
Parameter paElbow = cdType.get_Parameter(BuiltInParameter.RBS_CURVETYPE_DEFAULT_BEND_PARAM);
if (paElbow == null)
{
throw new NullReferenceException("在线管中没有找到匹配的弯头参数");
}
ElementId elbowId = paElbow.AsElementId();
FamilySymbol fs = _doc.GetElement(elbowId) as FamilySymbol;
if (docTrans.GetStatus() == TransactionStatus.Started)
{
docTrans.Commit();
}
// 在_doc.EditFamily之前，必须要确保没有打开的事务
Document famDoc;
famDoc = _doc.EditFamily(fs.Family);
if (null == famDoc || !famDoc.IsFamilyDocument)
{
throw new NullReferenceException("无法编辑线管设定的弯头所对应的族文件");
}
ElbowFamily mepElbow = new ElbowFamily(famDoc);
string formula = mepElbow.GetFormula(); // 其值应该大致为 “管件外径 * 15”
famDoc.Close(false);
//
docTrans.Start("读取完弯头族文档中的参数后重新开启事务");
try
{
string ratio = formula.Split(new char[] { '*' })[1];
return(double.Parse(ratio));
}
catch
{
throw new InvalidOperationException("弯头的族参数不是“管件外径 * 15”的形式");
}
}
