设置自定义Exception的消息而不将其传递给基本构造函数 [英] Setting the message of a custom Exception without passing it to the base constructor

问题描述

我想在C#中创建一个自定义的Exception，但是从理论上讲，我确实需要先进行一些解析，然后才能制作出人类可读的ExceptionMessage.

I want to make a custom Exception in C#, but in theory I do need to do a little parsing first before I can make a human readable ExceptionMessage.

问题在于原始消息只能通过调用Messsage的基本构造函数来设置，因此我无法提前进行任何解析.

The problem is that the orginal Message can only be set by calling the base constructor of Messsage, so I can't do any parsing in advance.

我试图像这样覆盖Message属性:

I tried overring the Message property like this:

public class CustomException : Exception
{
    string _Message;

    public CustomException(dynamic json) : base("Plep")
    {
        // Some parsing to create a human readable message (simplified)
        _Message    = json.message;
    }

    public override string Message
    {
        get { return _Message; }
    }
}

问题在于，在这种情况下，Visual Studio调试器仍显示我已传递给构造函数 Plep 的消息.

The problem is that the Visual Studio debugger still shows the message that I've passed into the constructor, Plep in this case.

throw new CustomException( new { message="Show this message" } )

导致:

如果我将基本构造函数留空，它将显示一条非常通用的消息:

If I leave the base constructor empty it will show a very generic message:

App.exe中发生了'App.CustomException'类型的未处理异常

问题

看起来异常对话框"读取了我也没有任何访问权限的某些字段/属性.还有其他方法可以在Exception的基本构造函数之外设置人类可读的错误消息.

It looks like the Exception Dialog reads some field/property that I don't have any access too. Is there any other way to set a human readable error message outside the base constructor on Exception.

请注意，我正在使用Visual Studio 2012.

Note that I'm using Visual Studio 2012.

推荐答案

是否只需将格式代码放入静态方法中?

Just put the formatting code into a static method?

public CustomException(dynamic json) : base(HumanReadable(json)) {}
private static string HumanReadable(dynamic json) {
    return whatever you need to;
}

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