来自finally块内的异常

Question

请考虑下面的代码，其中LockDevice（）可能会失败并在自身上抛出异常。如果在finally块中引发异常，那么在C＃中会发生什么？

 
UnlockDevice(); 

try 
{ 
    DoSomethingWithDevice(); 
} 
finally 
{ 
    LockDevice(); // can fail with an exception 
} 

Answer 1

完全相同的事情，如果它不是在一个finally块中会发生 - 一个异常可能从这个点传播。如果需要，你可以内最后的try/catch来自：

try 
{ 
    DoSomethingWithDevice(); 
} 
finally 
{ 
    try 
    { 
     LockDevice(); 
    } 
    catch (...) 
    { 
     ... 
    } 
} 

Answer 2

的方法被称为的try/catch

哪里是你的收获？

UnlockDevice(); 

try 
{ 
    DoSomethingWithDevice(); 
} 
catch(Exception ex) 
{ 
    // Do something with the error on DoSomethingWithDevice() 
} 
finally 
{ 
    try 
    { 
     LockDevice(); // can fail with an exception 
    } 
    catch (Exception ex) 
    { 
     // Do something with the error on LockDevice() 
    } 
}