从参数中获得特定字符串 =left(right(right(Fields!ts.Value,4),len(right(Fields!ts.Value,4))-Instr(right(Fields!ts.Value,4),"[")),Instr(right(right(Fields!ts.Value,4),len(right(Fields!ts.Value,4))-Instr(right(Fields!ts.Value,4),"[")),"]")-1)