SOS!各位大侠救救小弟，

buanhui 发表于 2003-5-31 15:34:00

本帖最后由作者于 2003-5-31 15:34:30 编辑

下面是把选中的实体从数据库中删除，但不成功，该如何实现，望各位大虾指点迷津，以解燃眉之急
rc = acedEntSel("\nSelect target layer entity. ", ent, ptpoint);
switch(rc)
{
case RTERROR :
acutPrintf("\nNothing selected!! ");
            break;
                  case RTCAN :
acutPrintf("\nUser canceled. ");
            break;

case RTNORM :

acdbGetObjectId(obId,ent);
acdbOpenObject(myobj,obId, AcDb::kForRead);
myobj->erase(Adesk::kTrue);//此处的用法是否有错误，劳指点?
acedRedraw(ent，1);//此处的用法是否有错误，劳指点?
break;
}

whyangdong 发表于 2003-5-31 22:15:00

正确用法如下

ads_name ent;
ads_point ptpoint;
int rc;
AcDbObjectId obId;
AcDbObject *myobj;
AcApDocument* pDoc = acDocManager->curDocument();
Acad::ErrorStatus es = acDocManager->lockDocument(pDoc);
if (es != Acad::eOk)
{
   acedAlert("Failed to lock the document!");
   return;
}

rc=acedEntSel("\nSelect target layer entity. ", ent, ptpoint);
switch(rc)
{
case RTERROR :
acutPrintf("\nNothing selected!! ");
      break;
case RTCAN :
acutPrintf("\nUser canceled. ");
      break;

case RTNORM :
acdbGetObjectId(obId,ent);
acdbOpenObject(myobj,obId, AcDb::kForWrite);

myobj->erase(true);
myobj->close();

break;
}
acDocManager->unlockDocument(pDoc);

buanhui 发表于 2003-6-2 20:15:00

多谢whyangdong大侠，需要进一步指点您提供的例子我能实现删除实体，但有一些问题

多谢whyangdong大侠您提供的例子我能实现删除实体，但有一些问题
我把原程序拿来，请大侠分析出错误的原因是什么
autoCAD报错是在第二次调用删除命令时和退出autoCAD时报错
/* ArxMain.cpp - Interface file of ObjectARX */

#include "MyEntity.h"
#include <aced.h>
#include <rxregsvc.h>
#include <dbapserv.h> // for acdbHostApplicationServices macro
#include <dbsymtb.h> // for AcDbBlockTable class
#include <geassign.h> // for asDblArray
#include <adslib.h>
#include <gelnsg3d.h>
#include <dbents.h>
#include <acdocman.h>
#include <string.h> // test

void createTriangle(void)
{

AcGePoint3d leftPnt3d, rightPnt3d,leftdPnt, rightdPnt,ptmy,point0,point1;
ads_point pt,ptpoint;
ads_real wallWd,layerHd;
ads_name ent;
      AcDbObjectId obId,obId1;
      AcGePoint3dArray points;
int rc;
AcDbVoidPtrArray xplode;
AcGeLineSeg3d thisline,otherline;
MyEntity* pTriangle;
AcDbObject *myobj;
AcApDocument* pDoc = acDocManager->curDocument();
Acad::ErrorStatus es = acDocManager->lockDocument(pDoc);
if (es != Acad::eOk)
{
   acedAlert("Failed to lock the document!");
   return;
}

acdbHostApplicationServices()->workingDatabase()->setElevation(1000);

if(acedGetPoint(NULL, "开始画墙...左点: ", pt) != RTNORM)
return;
leftPnt3d = asPnt3d(pt);
if(acedGetPoint(pt, "\n右点: ", pt) != RTNORM)
return;
rightPnt3d = asPnt3d(pt);
if(acedGetReal("\n墙的宽度: ", &wallWd) != RTNORM)
return;
if(acedGetReal("\n墙的高度: ", &layerHd) != RTNORM)
return;

pTriangle = new AcDbEquiTriangle();
pTriangle->set(leftPnt3d, rightPnt3d,wallWd,layerHd);
pTriangle->getdownPoints( leftdPnt, rightdPnt);

// 将新建实体(pTriangle)添加到图形数据库中
AcDbBlockTable *pBlockTable;
acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable, AcDb::kForRead);
AcDbBlockTableRecord *pBlockTableRecord;
pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
pBlockTable->close();

AcDbObjectId objectId;
pBlockTableRecord->appendAcDbEntity(objectId, (AcDbEquiTriangle *)pTriangle);
pBlockTableRecord->close();
pTriangle->close();
acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable, AcDb::kForWrite);
acutPrintf("\nSelect target layer entity. ");

rc=acedEntSel("\nSelect target layer entity. ", ent, ptpoint);
switch(rc)
{
      case RTERROR :
         acutPrintf("\nNothing selected!! ");
         break;
      case RTCAN :
         acutPrintf("\nUser canceled. ");
         break;

      case RTNORM :
         acdbGetObjectId(obId,ent);
         acdbOpenObject(myobj,obId, AcDb::kForWrite);

         myobj->erase(true);
         myobj->close();

         break;
}
acDocManager->unlockDocument(pDoc);
return;
}

whyangdong 发表于 2003-6-4 09:49:00

你两次获得块表指针是错误的

在执行删除命令前,你又一次打开当前模型空间块表指针而且没有关闭块表指针,这一步是多余的,去掉即可

页: [1]

明经CAD社区's Archiver