Long distance contribution toD→πl+l−

We calculate the long distance contribution to $D^{+,0\mathrm{}}\to {\pi }^{+,0\mathrm{}}{l}^{+}{l}^{-}$ decays by the use of a vector meson dominance model, in which the $\phi$ meson plays the central role. The branching ratios obtained are ${10}^{-6}$ and a few times ${10}^{-7}$ for the resonance and nonresonance regions, respectively. The analysis includes a calculation of $D^{+}\to {\pi }^{+}\phi$, consistent with the experimental value.