使用OleDbDataAdapter从Excel工作表中获取数据时出现问题

First, I want to say that I'm out on deep water here, since I'm just doing some changes to code that is written by someone else in the company, using OleDbDataAdapter to "talk" to Excel and I'm not familiar with that. There is one bug there I just can't follow.First, I want to say that I'm out on deep water