preview AutoCad Map query

[Anonymous]

how can I  query autocad map data in preview mode,and store these objects in a collection by using C#.

(I want to use simple query like all lwpolyline having layer = "test" and color = 3). If I run this query in draw mode multiple times what will happen? (means possibilty of duplicate objects??)

Thanks

Murali

[Alfred.NESWADBA]

Hi,

do you need any Map3D functionality like re-projection depending on different geo-coord-systems or something like saveback?

If not I had much more luck replace the Map-query-functionality by my own routine, just

• open the external database(s)
• get the modelspace-blocktablerecord
• scan it to get the objectid's matching the ObjectClass (DxfName of the Objecttype), if the objecttype is correct you can then check the other properties you want to compare
• does the object match, collect it by saving handle and drawing-filename into an own list.

- alfred -

[Anonymous]

I have to use map query only to show(preview) the quried data into the current drawing and do not want to do any type of editing in quried dwg. Before it I have to set the coordinate system say XYZ of the curent dwg.

Thanks

Murali

[Alfred.NESWADBA]

Hi,

>> I have to use map query only to show(preview) the quried data into the current drawing

E.g. use WorlDraw (or at least JIG without mouse-move-following) then, it's just a preview and not the adding to the database then.

- alfred -