Question

我有一个try catch块，它包含两个可以抛出ArgumentException的方法。

我想区分异常，以便我可以为用户返回更好的错误消息。最好的方法是什么？（我想避免用两个独立的try catch块来包围它。）

try
{
    var store = storeFactory.Create(id); // Can Throw ArgumentException
    var order = await store.GetOrderAsync(orderId); //Can Throw ArgumentException

    return Ok(order);
}
catch (ArgumentException ex)
{
    //TODO: How To Tell Which Methods Throw The Exception (Create Or GetOrderAsync)
    return NotFound("Store Id Was Not Found");
    return NotFound("Order Id Was Not Found");
}

Answer 1

您只需将try块分成两个try块：

try
{
    var store = storeFactory.Create(id); // Can Throw ArgumentException
    try
    {
       var order = await store.GetOrderAsync(orderId); //Can Throw ArgumentException

       return Ok(order);
    }
    catch ( ArgumentException ex )
    {
       return NotFound("Order Id Was Not Found");
    }
}
catch (ArgumentException ex)
{
    //TODO: How To Tell Which Methods Throw The Exception (Create Or GetOrderAsync)
    return NotFound("Store Id Was Not Found");
}

然而，更好的解决方案是为两种情况创建一种新类型的例外，例如：

public class OrderNotFoundException : Exception

和

public class StoreNotFoundException : Exception

然后修改您的方法以改为抛出这些描述性错误。

抛出异常的两种方法如何区分它们

1 个答案: