finally 块和 catch 块之后的代码清理之间的区别 (C#)

Question

在 finally 块中添加清理代码和在 catch 块之后添加清理代码有什么区别？

     try
     {
      //some code
     }
     catch
     {
     }
     finally
     {
      //cleanup
     }

和

     try
     {
      //some code
     }
     catch
     {
     }
      //cleanup

Answer 1

如果您从 try .. catch 块中抛出一个未被此 catch 捕获的可抛出对象，finally 子句中的清理代码将执行，并且 finally 之后的代码将立即执行=11=] 块不会。

Answer 2

在第二种情况下，如果代码从 catch 块中重新抛出异常或 return，则不会调用您的 cleanup 代码。在 finally 块的情况下，即使您有异常或来自 catch 块的 return 语句，它也会被执行。

MSDN 说：

By using a finally block, you can clean up any resources that are allocated in a try block, and you can run code even if an exception occurs in the try block. Typically, the statements of a finally block run when control leaves a try statement. The transfer of control can occur as a result of normal execution, of execution of a break, continue, goto, or return statement, or of propagation of an exception out of the try statement.

finally 块和 catch 块之后的代码清理之间的区别 (C#)

Difference between code cleanup in finally block and after catch block (C#)

asp.net

try-catch

code-cleanup