每个平台都应该具备异常处理策略，此处异常处理策略只针对用户请求产生的当前线程异常，不包括异步处理时产生的未捕获异常，关于异常处理建议大家可以去看下微软企业库的 Exception Handling Application Block
AbsCommonExceptionFilterAttribute，同信息验证一样，异常也是通过Attrbute来处理 using System.Net;using System.Net.Http;using System.Web.Http.Filters;/// <summary>/// WebAPI异常响应处理/// </summary>public abstract class AbsCommonExceptionFilterAttribute : ExceptionFilterAttribute{/// <summary>/// Raises the exception event/// </summary>/// <param name="actionExecutedContext">The context for the action.</param>public override void OnException(HttpActionExecutedContext actionExecutedContext){string exceptionStr = string.Empty;HttpStatusCode statusCode = HttpStatusCode.InternalServerError;if (this.AllowException){//允许在返回结果中包含异常信息exceptionStr = this.HandleException(actionExecutedContext, ref statusCode);}//此处可以修正返回值actionExecutedContext.Response = actionExecutedContext.Request.CreateResponse(statusCode, new StringContent(exceptionStr));//actionExecutedContext.Response = new HttpResponseMessage(statusCode) { Content = new StringContent(exceptionStr) };}/// <summary>/// 是否允许返回异常信息，，测试环境中应当允许返回异常以辅助测试，正式环境中应禁止返回异常/// </summary>protected abstract bool AllowException { get; }/// <summary>/// 异常处理策略/// </summary>/// <param name="actionExecutedContext"></param>/// <param name="ex"></param>/// <returns></returns>protected virtual string HandleException(HttpActionExecutedContext actionExecutedContext, ref HttpStatusCode statusCode){//此处可以对异常进行分类处理，修正返回的HttpStatusCode//也可以对异常进行封装或者转换，建议采用微软企业库的Exception Handling Application Block//if (actionExecutedContext.Exception is NotImplementedException)//{// statusCode = HttpStatusCode.NotImplemented;//}return actionExecutedContext.Exception.ToString();}}子类例子 public class CommonExceptionFilterAttribute : AbsCommonExceptionFilterAttribute{protected override bool AllowException{get { return true; }}}注册Attribute，在默认生成的WebApiConfig文件的Register方法中增加如下代码config.Filters.Add(new CommonExceptionFilterAttribute());
可你仍然感谢天地和人世所带来的这些变化和发生。
