1.继承ExceptionFilterAttribute类,重写OnException方法
public class WebApiExceptionFilterAttribute : ExceptionFilterAttribute
{
//重写基类的异常处理方法
public override void OnException(HttpActionExecutedContext actionExecutedContext)
{
//业务异常处理
if (actionExecutedContext.Exception is BusinessException)
{
var businessException = (BusinessException)actionExecutedContext.Exception;
//自定义业务异常编码
int businessExceptionCode = businessException.ErrorMessage.Code;
//业务异常消息
string businessExceptionMsg = businessException.Message;
//异常消息Json串
var err = new { errcode = businessExceptionCode, errmsg = businessExceptionMsg };
string errMsg = JsonConvert.SerializeObject(err);
//系统异常码
var oResponse = new HttpResponseMessage(HttpStatusCode.InternalServerError);
oResponse.Content = new StringContent(" ");
oResponse.Headers.Add("errMsg", errMsg);
actionExecutedContext.Response = oResponse;
}
else
{
actionExecutedContext.Response = new HttpResponseMessage(HttpStatusCode.InternalServerError);
//异常消息Json串
var err = new { errcode = CommonErrorCode.ServiceError, errmsg = actionExecutedContext.Exception.Message };
string errMsg = JsonConvert.SerializeObject(err);
//系统异常码
var oResponse = new HttpResponseMessage(HttpStatusCode.InternalServerError);
oResponse.Content = new StringContent(" ");
oResponse.Headers.Add("errMsg", errMsg);
actionExecutedContext.Response = oResponse;
}
base.OnException(actionExecutedContext);
}
}
2. Global.asax中,Application_Start方法中添加过滤器
protected void Application_Start()
{
GlobalConfiguration.Configure(WebApiConfig.Register);
GlobalConfiguration.Configuration.Filters.Add(new WebApiExceptionFilterAttribute());
}
3.例子:
控制器:
public class TestController : ApiController
{
[HttpGet]
public string GetTest1()
{
return "value1";
}
[HttpGet]
public string GetTest2()
{
throw new BusinessException(123456,"业务异常");
}
[HttpGet]
public string GetTest3()
{
throw new Exception("系统异常");
}
}
结果:
提升:
为了满足每个webapi项目都应用自定义异常,把异常类封装到程序集中使用
1.结构:
问题:YesWay.WebAPI异常抛出类库添加引用需与webapI项目用的引用需相同,
之前的这些我都是在引用管理器,程序集中一个个找的,添加的,出现进不了OnException方法的问题,用nuget添加的就好了,可能是版本不一样吧
具体有这些东东:(他们之间有依赖,不需要一个个加,加一个可能会出来好几个...)
webapi需要引用的包:
Microsoft.AspNet.WebApi
Microsoft.AspNet.WebApi.Client
Microsoft.AspNet.WebApi.Client.zh-Hans
Microsoft.AspNet.WebApi.Core
Microsoft.AspNet.WebApi.Core.zh-Hans
Microsoft.AspNet.WebApi.WebHost
Microsoft.AspNet.WebApi.WebHost.zh-Hans
Microsoft.CodeDom.Providers.DotNetCompilerPlat
Microsoft.Net.Compilers
Newtonsoft.Json
2.webapi项目引用程序集
3.可以在控制器,控制器方法加特性使用
