Question

考虑以下代码，其中LockDevice（）可能会失败并在ist上抛出异常。如果从finally块中引发异常，C＃中会发生什么？

UnlockDevice();

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

Answer 1

如果它不在finally块中会发生完全相同的事情 - 异常可能从那一点传播。如果需要，可以在finally中尝试/ catch：

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

Answer 2

该方法称为 Try / Catch

哪里是你的捕获？

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()
   }
}

来自finally块的异常

2 个答案: