Web API 2服务-如何在状态中返回异常消息

// 自定义异常类
public class CustomException : Exception
{
    public CustomException(string message) : base(message)
    {
    }
}

// 控制器中的操作
public IHttpActionResult Get()
{
    try
    {
        // 某个操作失败，抛出自定义异常
        throw new CustomException("操作失败");
    }
    catch (CustomException ex)
    {
        // 在异常过滤器中处理异常
        throw new HttpResponseException(HttpStatusCode.BadRequest);
    }
}

// 异常过滤器
public class CustomExceptionFilter : ExceptionFilterAttribute
{
    public override void OnException(HttpActionExecutedContext actionExecutedContext)
    {
        if (actionExecutedContext.Exception is CustomException)
        {
            // 设置状态码和消息体
            actionExecutedContext.Response = new HttpResponseMessage(HttpStatusCode.BadRequest)
            {
                Content = new StringContent(actionExecutedContext.Exception.Message)
            };
        }
    }
}