我可以在表达式切换案例中重新抛出现有异常吗？

Question

我想知道是否可以在表达式转换案例中重新抛出现有异常（在 catch 子句中）？请看一下代码示例：

try 
{
    // Some code...
}
catch (Exception ex)
{
  return ex switch
  {
    ExceptionA => // return some value with expression.
    ExceptionB => // return some value with expression
    _ => throw ex
  }

}

代码将以以下错误结束：

Re-throwing caught exception changes stack information

此代码仅供参考；很明显，声明 switch case 是显而易见的解决方案

switch (ex)
{
  case 1: ...
  case 2: ...
  default: throw;
{

Answer 1

只需捕获特定的 Exception 类型：

try
{
    // Some code...
}
catch (ExceptionA exA)
{ 
    // maybe log this
    return "something"; 
}
catch (ExceptionB exB)
{ 
    // maybe log this
    return "something else"; 
}
catch (Exception ex)
{ 
    // log this
    throw; // throw keeps the original stacktrace as opposed to throw ex 
}

正如您询问如何使用 switch 执行此操作一样，这也应该有效：

try
{
    // Some code...
}
catch (Exception ex)
{
    switch(ex)
    {
        case ExceptionA exA:
            return "something";
        case ExceptionA exA:
            return "something else";
        default:
            throw;
    }
}

我可以在表达式切换案例中重新抛出现有异常吗？

Can I rethrow an existing exception in an expression switch case?

c#

asp.net

.net-6.0