Sorry for posting here, I realize that this thread is dormant but I have the same issue under KDE linux (Antergos OS; based on Arch Linux).
I tried the solution suggested by @Vinod Kumar but it doesn't work because the dialog window didn't let me choose a location even if I press Ctrl+L. I attached the image of the window.
Somebody tell me that I could mount the samba share to a directory in my home but I don't know exactly how to do that and it would be a dirty walkaround (provided that this solution works).
I think this dialog open window is Qt4, and nowadays KDE is built around Qt5. Anyway do you guys know any solution? Thanks in advance!