[MSCE U14 C#]如何删除文档中的参数化单元定义？

Question

我用DgnComponentDefinitionModelHandler的CreateCellDefinition方法定义了一个参数化单元，后面更新了库文件，然后想重新定义，需要删除现有定义，没有找到相关接口， DgnComponentDefinitionModelHandler 有个更新定义的函数，但调用后没有效果，请问如何将现有参数化定义删除呢，或者有元其他可以更新定义的方法？

HongQiang Guo · Accepted Answer

如果当前dgn文件里边没有放置此参数单元定义相关的实例单元元素，则可以直接压缩一下文件然后重新连接去放置就可以。如果已经放置了，现在想Update一下当前dgn文件中单元的定义的话，需要通过反射调用一下程序集中一个internal的方法，详情请参考如下代码： 
 private static DgnComponentDefinitionModelHandler LocateCellModelHandler(string name)
 {
 var opts = CellLibraryOptions.Include3d | CellLibraryOptions.IncludeAllLibraries | CellLibraryOptions.IncludeParametric;
 var libs = new CellLibraryCollection(opts);
 DgnModel cellModel = null;
 foreach (var lib in libs)
 {
 if (name.Equals(lib.Name))
 {
 StatusInt status;
 cellModel = lib.File.LoadRootModelById(out status, lib.File.FindModelIdByName(lib.Name), true, false, true);
 break;
 }
 }

 var hdlr = null != cellModel ? DgnComponentDefinitionHandler.GetForModel(cellModel) : null;
 return null != hdlr ? hdlr.DefinitionModelHandler : null;
 }
 public static void UpdateCellDef()
 {
 string cellName = "Double Door Cabinet";
 ParametricCellDefinitionElement cellDef = ParametricCellDefinitionElement.FindByName("Double Door Cabinet", Session.Instance.GetActiveDgnFile());
 if (null == cellDef)
 return;
 var hdlr = LocateCellModelHandler(cellName);
 Type type = typeof(UpdateCellVm);
 ConstructorInfo[] conInfoArr = type.GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic);
 if (0 == conInfoArr.Length)
 return;
 object[] objArr = new object[2] { cellDef,hdlr };
 object obj = conInfoArr[0].Invoke(objArr);
 MethodInfo oMethod = type.GetMethod("DoUpdate", BindingFlags.Instance | BindingFlags.NonPublic);
 oMethod.Invoke(obj, new Object[] { });
 }

lingwei liu · Answer

public static void UpdateCellDefinition(string cellName, DgnComponentDefinitionHandler hdlr)
{
 ParametricCellDefinitionElement cellDef = ParametricCellDefinitionElement.FindByName(cellName, Session.Instance.GetActiveDgnFile());
 if (null == cellDef)
 return;

 //var hdlr = LocateCellModelHandler(cellName);
 Type type = typeof(PCM.View.UpdateCellVm);
 ConstructorInfo[] conInfoArr = type.GetConstructors(BindingFlags.Instance | BindingFlags.NonPublic);
 if (0 == conInfoArr.Length)
 return;

 object[] objArr = new object[2] { cellDef, hdlr };
 object obj = conInfoArr[0].Invoke(objArr);
 MethodInfo oMethod = type.GetMethod("DoUpdate", BindingFlags.Instance | BindingFlags.NonPublic);
 oMethod.Invoke(obj, new Object[] { });
}

[MSCE U14 C#]如何删除文档中的参数化单元定义？

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