实现了VC在线读取csv格式的文件，并且保证不会出现乱码。 -Implements the VC online read CSV format of the file, and ensure that won t appear garbled.

VC动态访问excel，利用excel作数据存储，写入与读出数据，发放于VC控件上面显示出来(VC visit Excel and use excel to store the data, read and write the data, issue the data out to the VC text field and show them.)