摘要：
转自codeproject，找了半天解决办法，这个最靠谱。我数据库用的EF做ORM，在vs里面测试的时候不会出现这个错误，用IIS就出错了。解决方法如下Solution for "The underlying provider failed on Open" exception.Byvenugopalm,11 Nov 2010As you guys know that I am posting enterprise architecture design article in code projecthere. While preparing third part, I s 阅读全文
