  We study the Helton-Howe trace and the Connes-Chern character for Toeplitz
operators on weighted Bergman spaces via the idea of quantization. We prove a
local formula for the large $t$-limit of the Connes-Chern character as the
weight goes to infinity. And we show that the Helton-Howe trace of Toeplitz
operators is independent of the weight $t$ and obtain a local formula for the
Helton-Howe trace for all weighted Bergman spaces using harmonic analysis and
quantization.
