Weird line type issue keeping dxf from being opened

[donnyv]

Attached are 2 dxf files. They are exactly the same except the line type on layer V-PROP-ASSESS has been changed to HIDDEN. For some reason when the line type is set to Wetlands. netDxf will not open it. I tried comparing the dxf file contents but its hard to make heads or tails out of that format.

LineTypeRemovedFor_V-PROP-ASSESS.zip

[haplokuon]

Your DXF files contains a lot of external referenced stuff. In your case, on my side, your file "0910_029_org.dxf" is the one giving me problems because it cannot find a required shape file. I may add a workaround for that, but I had no problems with the other file "0910_029_linetypechanged.dxf".

Try the latest code and the release build if you have not done so, yet.

[donnyv]

0910_029_org.dxf is the one I had issues with. I'm using the latest release.

[haplokuon]

I found a couple problems that will be fixed with the next update, that may affect your file. One has to do with getting the information from the SHX file through the ShapeStyle class. The other one is related with linetypes defined in the layer states not found in the document linetype list, in your case due to the externally referenced drawings.

Remember that when using shapes in complex linetypes or as entities, you need to supply a way to find the SHX file, like: DxfDocument dxf = DxfDocument.Load(file, new List<string> {@".\Support"});

[donnyv]

Unfortunately I don't have control of the drawing. I get them however they send it. I only need the actual line work in it. Thank you so much for looking at it.

[donnyv]

I just ran across another dxf with the same issue but different layers. It could help you with testing. 0909_021.zip

[haplokuon]

Found an invalid handle to a linetype in a LayerState. I should have safely cast that reference, I do not do it everywhere, and this kind of wrong values appear from time to time. The program should be responsible of writing correct values in the required fields, nonetheless, but if AutoCad does not complain, me neither, usually it crashes with bad handle references. It is a very easy fix, if you want to try it change the line 11114 of the DxfReader.cs where it says

Linetype linetype = (Linetype) this.doc.GetObjectByHandle((string) recordEntry.Value);

should say

Linetype linetype = this.doc.GetObjectByHandle((string) recordEntry.Value) as Linetype;

[donnyv]

Funny thing is that this dxf came from a AutoCad export.