  We present a direct measurement of the parity-violation parameter $A_c$ in
the coupling of the $Z^0$ to $c$-quarks with the SLD detector. The measurement
is based on a sample of 530k hadronic $Z^0$ decays, produced with a mean
electron-beam polarization of $|P_e| = 73 %$. The tagging of $c$-quark events
is performed using two methods: the exclusive reconstruction of $D^{\ast+}$,
$D^+$, and $D^0$ mesons, and the soft-pions ($\pi_s$) produced in the decay of
$D^{\ast+}\to D^0 \pi_s^+$. The large background from $D$ mesons produced in
$B$ hadron decays is separated efficiently from the signal using precision
vertex information. The combination of these two methods yields $A_c = 0.688
\pm 0.041.$
