how to store dxf file in thingworx

I don't think there is any ootb widget to view the .dxf files. You can upload and download .dxf files in thingworx repositories like any other file.

Regards,

Sachin Sharma

To upload (any) file you can use one of the following widgets in a mashup:

- https://support.ptc.com/help/thingworx/platform/r9/en/index.html#page/ThingWorx/Help/Mashup_Builder/Widgets/FileUploadWidgetThemable.html for TWX >= 9.3.4

- https://support.ptc.com/help/thingworx/platform/r9/en/index.html#page/ThingWorx/Help/Mashup_Builder/Widgets/FileUploadWidget.html 

So the client could upload the files via a mashup. Or how does he want to upload them?