在内部尝试你没有可能应该是一个catch块。



外部异常是什么，你根本不调查异常。尝试在

In the inner try you don't have a catch block at all, probably should be.

What comes to the outer exception, you don't investigate the exception at all. Try showing the message of the exception in

...
catch (Exception ex)
{
   // Show ex.Message over here
}
...