根据我的测试，看来OLEDB的文件名受到限制最多为64个字符，其中包括.csv扩展名.

According to my tests, it would appear that a filename for OLEDB is restricted to a total of 64 characters, this includes the .csv extension.

首先检查文件名，如果文件名太长，可以暂时将其更改为较短的文件名(如果文件名不是太短)较大的文件，您可能需要一个临时副本)，然后将其转换回(或删除该临时文件).

first check the filename, if it is too long you could temporarily change it to something shorter (if the file is not too large you might want a temporary copy) and then convert it back (or delete the temporary file).