The*_*tan 7 c# asp.net-mvc visual-studio asp.net-web-api2 webapi2
使用c#Web Api 2,我有抛出的代码InvalidOperationException.返回状态代码302时,如何使用HandleException注释为重定向提供位置?
[HandleException(typeof(InvalidOperationException), HttpStatusCode.Found, ResponseContent = "Custom message 12")]
public IHttpActionResult GetHandleException(int num)
{
switch (num)
{
case 12: throw new InvalidOperationException("DONT SHOW invalid operation exception");
default: throw new Exception("base exception");
}
}
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编辑:对不起,我有点急忙问这个问题.上面的类使用HandleExceptionAttribute类,该类继承自ExceptionFilterAttribute.当我试图调试他们的单元测试时,我没有意识到这一点.单元测试中不会出现此问题,但使用需要重定向URL的Visual Studio .webtest会显示该问题.从ExceptionFilterAttribute继承的类未提供允许提供重定向URL的参数.对不起,问题不完整,谢谢你花时间回答.
/// <summary>
/// This attribute will handle exceptions thrown by an action method in a consistent way
/// by mapping an exception type to the desired HTTP status code in the response.
/// It may be applied multiple times to the same method.
/// </summary>
[AttributeUsage(AttributeTargets.Method, Inherited = false, AllowMultiple = true)]
public sealed class HandleExceptionAttribute : ExceptionFilterAttribute
{
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编辑:感谢您更新问题。尽管我仍然不确定为什么要在此 WebApi 方法中进行重定向。希望这个答案能有所帮助。
我将处理 HandleExceptionAttribute 中的所有异常逻辑。您甚至可以使用您正在寻找的 302 代码从那里进行重定向。你的 HandleExceptionAttribute 看起来像这样(我提供了 3 种不同的基于异常返回结果的方法):
public sealed class HandleExceptionAttribute : ExceptionFilterAttribute
{
public override void OnException(HttpActionExecutedContext context)
{
//TODO: we can handle all types of exceptions here. Out of memory, divide by zero, etc etc.
if (context.Exception is InvalidOperationException)
{
var httpResponseMessage = context.Request.CreateResponse(HttpStatusCode.Redirect);
httpResponseMessage.Headers.Location = new Uri("http://www.YourRedirectUrl");
throw new HttpResponseException(httpResponseMessage);
}
if (context.Exception is UnauthorizedAccessException)
{
context.Response = context.Request.CreateErrorResponse(HttpStatusCode.Unauthorized, context.Exception.Message);
return;
}
if (context.Exception is TimeoutException)
{
throw new HttpResponseException(context.Request.CreateResponse(HttpStatusCode.RequestTimeout, context.Exception.Message));
}
context.Response = context.Request.CreateErrorResponse(HttpStatusCode.InternalServerError, "Unable to process your request.");
}
}
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但是,如果您确实希望按照您要求的方式完成,您可以向 GetHandleException 方法添加第二个参数。这将接收消息字符串(或 URL),然后在 HandleExceptionAttribute 中将重定向 url 添加到参数(ActionArguements):
public IHttpActionResult GetHandleException(int num, string message = "")
{
switch (num)
{
case 12: return Redirect(message); //message string would be your url
default: throw new Exception("base exception");
}
}
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那么你的 HandleExceptionAttribute 看起来像这样:
public sealed class HandleExceptionAttribute : ExceptionFilterAttribute
{
public override void OnException(HttpActionExecutedContext context)
{
context.ActionContext.ActionArguments["message"] = "your redirect URL";
}
}
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