【转帖】为什么已经切换当前数据库，acedssget还是对老的数据库操作？
 

为什么已经切换当前数据库，acedssget还是对老的数据库操作？
为什么已经切换当前数据库，acedssget还是对老的数据库操作？
bool cblueprintdrawing::createblueprint(long lblueprinttemplateid, int ipageno)
{
acad::errorstatus es;
acdbdatabase *pdb;
cstring m_blueprintfilefullname;
cstring t_blueprinttemplatefilename;
pdb = new acdbdatabase;
//获取模板文件名
es = pdb->readdwgfile( t_blueprinttemplatefilename);
if( es != acad::eok )
{
acutprintf("\n没有发现 %c 文件!\n", t_blueprinttemplatefilename);
delete pdb;
return false;
}
acdbdatabase *polddb = acdbhostapplicationservices()->workingdatabase();
acdbhostapplicationservices()->setworkingdatabase(pdb);
acdbblocktable *pblocktable;
pdb->getsymboltable(pblocktable, acdb::kforread);
//acdbhostapplicationservices()->workingdatabase()->getsymboltable(pblocktable, acdb::kforread);
acdbblocktablerecord *pblocktablerecord;
pblocktable->getat(acdb_model_space, pblocktablerecord, acdb::kforwrite);
pblocktable->close();

//---- 绘制图形
cblueprintdrawing::createtablegroup( pblocktablerecord );

//---- 绘制图纸框架
//?????????????? 选择集出现问题
//如果polddb中在选择区域中有实体，就可以；反之不行。
//希望pdb中在选择区域中有实体，就可以；反之不行。
//pdb已经是当前数据库为什么还关联polddb
cblueprintdrawing::createframeline( pblocktablerecord );
//---- 关闭块表
pblocktablerecord->close();
//切换回原工作表
acdbhostapplicationservices()->setworkingdatabase(polddb);
//保存图纸
pdb->saveas(m_blueprintfilefullname);
delete pdb;
}
bool cblueprintdrawing::createframeline(acdbblocktablerecord *pblocktablerecord)
{
int stat;
long number;
ads_name ssname;
ads_point t_ptw0, t_ptw1;
acgepoint3d ptw0(0, 0, 0), ptw1(0, 297, 0);
number = 0;
t_ptw0[x] = 210.0;
t_ptw0[y] = 0.0;
t_ptw0[z] = 0.0;
t_ptw1[x] = 420.0;
t_ptw1[y] = 297.0;
t_ptw1[z] = 0.0;
//建一个交叉窗口选择集
stat = acedssget("c", t_ptw0, t_ptw1, null, ssname);
if ( stat != rtnorm )
{
acedalert("创建交叉选择集不成功!");
}
else
{
acedsslength(ssname, &number);
acedalert("创建交叉选择集成功!");
while ( number != 0 )
{
ptw0.x = t_ptw0[x];
ptw1.x = t_ptw1[x];
t_ptw0[x] += 210.0;
t_ptw1[x] += 210.0;
number = 0;
acedssfree(ssname);
acedssget("c", t_ptw0, t_ptw1, null, ssname);
acedsslength(ssname, &number);
}
}
//-- 绘制外框线
acgepoint3d pt0(0, 0, 0), pt1(0, 297, 0), pt2(0, 0, 0), pt3(0, 0, 0);
pt2.x = ptw1.x;
pt2.y = ptw1.y;
pt3.x = ptw1.x;
pt3.y = ptw0.y;
createline(pblocktablerecord, pt0, pt1);
createline(pblocktablerecord, pt1, pt2);
createline(pblocktablerecord, pt2, pt3);
createline(pblocktablerecord, pt3, pt0);
return true;
}
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