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对于业务层的程序的致命错误,我们一直的做法就是直接抛出指定的异常,让程序去终断,这种做法是对的,因为如果一个业务出现了致命的阻塞的问题,就没有必要再向上一层一层的返回了,但这时有个问题,直接抛异常,意味着服务器直接500了,前端如何去显示,或者如果你是API的服务,如果为前端返回,如果是500,那直接就挂了,哈哈!
下面是在MVC环境下优化的全局异常捕获代码(非API)
???/// <summary> ???/// 全局异常捕获 ???/// </summary> ???public class GlobalExceptionFilterAttribute : HandleErrorAttribute ???{ ???????public override void OnException(ExceptionContext context) ???????{ ???????????JsonResult response = new JsonResult() ???????????{ ???????????????JsonRequestBehavior = JsonRequestBehavior.AllowGet ???????????}; ???????????if (context.Exception is ArgumentException) ???????????{ ???????????????var exception = (ArgumentException)context.Exception; ???????????????response.Data = new ???????????????{ ???????????????????statusCode = System.Net.HttpStatusCode.InternalServerError, ???????????????????errorcode = "02", ???????????????????message = exception.Message, ???????????????}; ???????????} ???????????else if (context.Exception is Exception) ???????????{ ???????????????var exception = (Exception)context.Exception; ???????????????response.Data = new ???????????????{ ???????????????????statusCode = System.Net.HttpStatusCode.InternalServerError, ???????????????????errorcode = "01", ???????????????????message = exception.Message, ???????????????}; ???????????} ???????????else ???????????{ ???????????????response.Data = new ???????????????{ ???????????????????statusCode = System.Net.HttpStatusCode.InternalServerError, ???????????????????errorcode = "03", ???????????????????message = "其它异常", ???????????????}; ???????????} ???????????context.Result = response; ???????????context.ExceptionHandled = true; ???????????context.HttpContext.Response.Clear(); ???????????context.HttpContext.Response.TrySkipIisCustomErrors = true; ???????} ???}如果业务层有问题,直接就throw了
??if (id == 0) ???????throw new ArgumentException("id不能为0"); ??if (id < 0) ???????throw new ArgumentException("id不能是负数");然后页面后,故意让它抛出异常,我们看一下页面响应的结果
事实上,对于服务器来说,它是200,正常返回的,而对不业务模块来说,它的状态是个500,呵呵,这点要清楚.
感谢各位阅读!
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爱上MVC~业务层刻意抛出异常,全局异常的捕获它并按格式返回
原文地址：http://www.cnblogs.com/lori/p/7490659.html