Article	60001307
Type	Wish
Product	Engine
Version	6019
Date Added	2/4/2011
Fixed	Yes [2/7/2011]
Submitted by	Geovani Miranda
Keywords

Subject

Opening large DWG file throws OutOfMemory exception

Summary

Opening large DWG file throws OutOfMemory exception

Solution

In version 6020 a new property ImportDWGFlags of vdFileProperties was added.

It gets one or more of the following values :

Enum	value	Description
None	0	Default value. with no flags for normal import.
IgnoreUnusedBlocks	1	Open drawing without importing unused vdBlock objects for lower memory consumption.
IgnoreXProperties	2	Open drawing without importing any
IgnoreAll	3	Open drawing without importing unused blocks and all Xproperties
ConvertToDxf	4	Converts the dwg to a temporary dxf file and open the dxf file
ConvertToDxf_IgnoreUnusedBlocks	5	Both of ConvertToDxf and IgnoreUnusedBlocks are used.
ConvertToDxf_IgnoreAll	7	Both of ConvertToDxf and IgnoreAll are used.
AnalyzePolylineCurves	8	Convert imported polylines with spline data to simple polylines by analyzing spline curves to points.

The default value for vdFileProperties.DWGFlags  is AnalyzePolylineCurves

Example in C#:
    vdDocument.FileProperties.ImportDWGFlags  =  DWGImportFlags.IgnoreAll;
    vdDocument.Open("someDrawing.dwg");

In Delphi the code you need in order to open big DWG drawings using the ImportDWGFlags property is :

procedure TForm1.Button1Click(Sender: TObject);
var  
     doc : VectorDraw_Professional_TLB.IvdDocument; // you need this reference
     flag : boolean;
begin
  vdraw1.DisableMouseStockEvents:=true;
  vdraw1.DisplayFrames:=63;
  vdraw1.StatusBarMenu:=true;
  vdraw1.StatusBar:=true;
  vdraw1.StatusBarPaper:=true;
  vdraw1.EnableAutoGripOn:=true;
  doc := vdraw1.ActiveDocument.WrapperObject as VectorDraw_Professional_TLB.IvdDocument;
  // or  doc.FileProperties.ImportDWGFlags:= 3;
  doc.FileProperties.ImportDWGFlags:= DWGImportFlags.DWGImportFlags_ConvertToDxf_IgnoreUnusedBlocks;
  flag:=vdraw1.activedocument.Open('',0,0);  
end;