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clone文字后，为什么cad不显示？
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clone文字后，为什么cad不显示？
dim db as database = hostapplicationservices.workingdatabase
dim trans as transaction = db.transactionmanager.starttransaction()
dim bt as blocktable = trans.getobject(db.blocktableid, openmode.forread)
dim btr as blocktablerecord = trans.getobject(bt(blocktablerecord.modelspace), openmode.forwrite)
dim sstext as dbtext
sstext = stext.clone()
sstext.position = pres.value
sstext.textstring = format(sum, make_format(jd))
btr.appendentity(sstext)
trans.addnewlycreateddbobject(sstext, true)
trans.commit()
trans.dispose()
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其中stext是一个已有的dbtext 运行结束后cad中不能显示，不知道为什么？请各位大侠指教！
using system;
using system.collections.generic;
using system.linq;
using system.text;
using autodesk.autocad.applicationservices;
using autodesk.autocad.databaseservices;
using autodesk.autocad.editorinput;
using autodesk.autocad.geometry;
using autodesk.autocad.runtime;
using acadapp = autodesk.autocad.applicationservices.application;
[assembly: commandclass(typeof(acad
namespace acad
static public void test01()
{
database db = hostapplicationservices.workingdatabase;
editor ed = acadapp.documentmanager.mdiactivedocument.editor;
promptentityoptions prentopts = new promptentityoptions("\nselect a text");
prentopts.setrejectmessage("\nselected entity must be of type text");
prentopts.addallowedclass(typeof(dbtext), false);
promptentityresult prentres = ed.getentity(prentopts);
if (prentres.status != promptstatus.ok)
return ;
ed.writemessage("\n masterid is : " + prentres.objectid.tostring());
objectid slaveid = objectid.null;
using (transaction tr = db.transactionmanager.starttransaction())
{
dbtext master = tr.getobject(prentres.objectid,
openmode.forread, true) as dbtext;
dbtext slave = master.clone() as dbtext;
blocktable bt = tr.getobject(db.blocktableid,
openmode.forread, false) as blocktable;
blocktablerecord btrmodelspace = tr.getobject(bt[blocktablerecord.modelspace],
openmode.forwrite, false) as blocktablerecord;
point3d mpos = master.position;
vector3d offset = new vector3d(0.0, 50.0, 0.0);
point3d spos = mpos.add(offset);
slave.position = spos;
slaveid = btrmodelspace.appendentity(slave);
tr.addnewlycreateddbobject(slave, true);
tr.commit();
}
ed.writemessage("\n slaveid is : " + slaveid.tostring());
}
}
}
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c#最适合开发autocad，因为它拥有vb容易的特点，却具有vc++的强大功能。
上面的代码转载自 但好像老外提到了，如果你要复制实体的话，还是用database.deepcloneobjects()，比较好
c#最适合开发autocad，因为它拥有vb容易的特点，却具有vc++的强大功能。