【转帖】利用选择集对polyline进行过滤
 

利用选择集对polyline进行过滤
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利用选择集对polyline进行过滤利用选择集对polyline进行过滤时，为什么选不到。而对比如line,circle均可实现？？
这个问题我这个菜鸟也遇到了，高手们帮帮忙解决下:
database db = hostapplicationservices.workingdatabase;
editor ed = application.documentmanager.mdiactivedocument.editor;
transaction trans = db.transactionmanager.starttransaction();
typedvalue[] fillist = new typedvalue[1];
fillist[0] = new typedvalue((int)dxfcode.start, "polyline");
selectionfilter filter = new selectionfilter(fillist);
promptselectionoptions opts = new promptselectionoptions();
promptselectionresult res = ed.getselection(opts,filter);
曲线救国,这个法子好像可以:
database db = hostapplicationservices.workingdatabase;
editor ed = application.documentmanager.mdiactivedocument.editor;
transaction trans = db.transactionmanager.starttransaction();
promptselectionoptions opts = new promptselectionoptions();
promptselectionresult res = ed.getselection(opts);
polyline plineselected = new polyline();
if (res.status != promptstatus.ok)
{
ed.writemessage("您所选的不是pline线实体！");
trans.commit();
trans.dispose();
return;
}
autodesk.autocad.editorinput.selectionset ss = res.value;
objectid plid = ss.getobjectids()[0];//获取所选pline线的id
entity ent = (entity)trans.getobject(plid, openmode.forread, false);
if (ent.gettype() == typeof(polyline))
{
plineselected = (polyline)ent;
}
double dtemp = plineselected.startpoint.x;

trans.commit();
trans.dispose();
new typedvalue((int)dxfcode.start, "lwpolyline");
new typedvalue(0, "lwpolyline");
楼上正解
那二维多线段呢？？？？
还有其他的实体呢？？
斑竹知道吗？？？
求救啊！！！！！！！！！！！！
谢谢。