如何使用azure webjobs SDK添加有关异常处理的自定义数据？

Question

我有一个简单的Azure函数，它返回到队列：

    private readonly TelemetryClient _telemetryClient;

    [return: Queue("%ReturnQueue%")]
    public async Task<string> Run([QueueTrigger("%RequestQueue%")] string msg, ILogger log)
    {
        try
        {
            //Some dependency calls   
        }
        catch(Exception ex)
        {
            var dic = new Dictionary<string,string>();
            dic.Add("Id", someId);
            dic.Add("CustomData", cusomData);

            _telemetryClient.TrackException(ex, dic);
        }
    }

我显然收到一个编译错误，指出并非所有代码路径都返回一个值。问题是，如果我在catch块的末尾添加了throw，则Azure Functions运行时会在appinsights门户上复制该专有内容。如何将自定义数据添加到这样的异常中？

Answer 1

public class MyCustomException : Exception
{
   public string Id {get;set;}
   public string CustomData {get;set;}
   public Exception RootException {get;set;}

   public MyCustomException(string id, string customData, Exception ex)
   {
      Id = id;
      CustomData = customData;
      RootException = ex;
   }
}


private readonly TelemetryClient _telemetryClient;

    [return: Queue("%ReturnQueue%")]
    public async Task<string> Run([QueueTrigger("%RequestQueue%")] string msg, ILogger log)
    {
        try
        {
            //Some dependency calls   
        }
        catch(Exception ex)
        {
            //var dic = new Dictionary<string,string>();
            //dic.Add("Id", someId);
            //dic.Add("CustomData", cusomData);

            var customEx = new MyCustomException(someId, cusomData, ex);

            _telemetryClient.TrackException(customEx);
        }
    }

PS：在MyCustomException中，您实际上可以具有Dictionary而不是字符串属性。