topic Revit API Export DWF error in Revit API Forum

Revit API Export DWF error

Anonymous — Mon, 12 Jan 2015 15:16:19 GMT

I want to export some views to a DWF file

But I keep getting this error:

cannot convert from 'Autodesk.Revit.DB.DWFExportOptions' to 'Autodesk.Revit.DB.SATExportOptions

The code look like this:

IList<ElementId> ImageExportList = new List<ElementId>();

// Here I select the viewes I want to export

ImageExportList.Add(View.Id);

var Eksport_DWF = new DWFExportOptions

{

MergedViews = true,

};

String FileName = "TESTNAME";

Export(DistFolder + @"\Billeder\", FileName, ImageExportList, Eksport_DWF);

The Path and the Imageexport list is the same one I am using in the same code for image export, where they worked well

I have tried to add .dwf to the FileName

What do I do vrong ?

Anders Kaas

Re: Revit API Export DWF error

arnostlobel — Mon, 12 Jan 2015 16:52:57 GMT

Hello Anders,

the DWF export method does not take a list of Element Ids as its third parameter. It takes a ViewSet instead, and that is what you have to provide. When you pass your imageExportList, which is a list of Element IDs, the run-time will try to find a matching override. It will believe that the SAT export is a better match, except for the option class, and that is the error you experience.

To fix it, construct a ViewSet object and add the views you want to export. Then pass this object as the third argument of the Export method together with our DWF options.

I hope this helps.

Re: Revit API Export DWF error

Anonymous — Mon, 12 Jan 2015 19:44:21 GMT

Thanks Arnošt

That fixed that error, but now I got an error from Revit that..

exporting to DWF/DWFX requires that document is modifiable and that APIUtility.ValidateCanModifyDocument.Export(String,String,Viewset,DWFExportoptions,BATCHEXPORTOPTIONS) but I can't find anything about BATCHEXPORTOPTIONS anywhere ??

I have added the fulle ytext from Revit

Can you help me again, please

Regards

Anders

Re: Revit API Export DWF error

arnostlobel — Mon, 12 Jan 2015 20:18:20 GMT

Hello Anders,

I am sorry for the trouble you get to experience. I have not been watching the development around DWF export for a while, but, apparently, the responsible programmer(s) has/have altered the code that it now requires the API programmer to be in a transaction at the time of evoking DWF Export. I suppose they have done it so because they need to make some temporary changes. Therefore I suggest you modify your code as follows:

using (Transaction trans = new Transaction(document,"DWF Export"))
{
   trans.Start();
   document.Export(....); // the actual export method as you have it
   trans.RollBack();
}

I hope it'll work now.

Re: Revit API Export DWF error

Anonymous — Mon, 12 Jan 2015 20:40:33 GMT

Thanks

It worked insite the transaction 🙂

Anders

Re: Revit API Export DWF error

arnostlobel — Mon, 12 Jan 2015 21:02:51 GMT

Thank for the confirmation. I thought it might work.

However, please try to use the code exactly as I suggested. In my opinion, it is not quite kosher to export a document in an open transaction and I am quite sure the responsible programmers made that change just to get around some bigger road-block. So, even if a transaction is now required (apparently), try to make sure that you close whatever transaction you may or may not have prior to getting to the exporting part. That will ensure the model is up to date and perfectly valid. Then and only then open a transaction just for that one Export method, and always roll it back.

Thank you