  We investigate the effects of charged-current (CC) nonstandard neutrino
interactions (NSIs) at the source and at the detector in the simulated data for
the planned Deep Underground Neutrino Experiment (DUNE), while neglecting the
neutral-current NSIs at the propagation due to the fact that several solutions
have been proposed to resolve the degeneracies posed by neutral-current NSIs
while no solution exists for the degeneracies due to the CC NSIs. We study the
effects of CC NSIs on the simultaneous measurements of $\theta_{23}$ and
$\delta_{CP}$ in DUNE. The analysis reveals that 3$\sigma $ C.L. measurement of
the correct octant of $\theta_{23}$ in the standard mixing scenario is spoiled
if the CC NSIs are taken into account. Likewise, the CC NSIs can deteriorate
the uncertainty of the $\delta_{CP}$ measurement by a factor of two relative to
that in the standard oscillation scenario. We also show that the source and the
detector CC NSIs can induce a significant amount of fake CP-violation and the
CP-conserving case can be excluded by more than 80\% C.L. in the presence of
fake CP-violation. We further find the potential of DUNE to constrain the
relevant CC NSI parameters from the single parameter fits for both neutrino and
antineutrino appearance and disappearance channels at both the near and far
detectors. The results show that there could be improvement in the current
bounds by at least one order of magnitude at the near and far detector of DUNE
except a few parameters which remain weaker at the far detector.
