Asp.net mvc 如何在ASP.NET WebAPI MediaTypeFormatter中检索HTTP请求方法?
我想在ASP.NET WebAPI函数返回JSON时抛出一个异常,其中值为IEnumerable,HTTP请求方法为GET- 我试图通过创建MediaTypeFormatter来实现这一点。我能做到吗?我还有别的办法吗?谢谢 比如:Asp.net mvc 如何在ASP.NET WebAPI MediaTypeFormatter中检索HTTP请求方法?,asp.net-mvc,json,asp.net-web-api,Asp.net Mvc,Json,Asp.net Web Api,我想在ASP.NET WebAPI函数返回JSON时抛出一个异常,其中值为IEnumerable,HTTP请求方法为GET- 我试图通过创建MediaTypeFormatter来实现这一点。我能做到吗?我还有别的办法吗?谢谢 比如: public class CustomFormatter : MediaTypeFormatter { public override Task WriteToStreamAsync(Type type, object value, Stream strea
public class CustomFormatter : MediaTypeFormatter
{
public override Task WriteToStreamAsync(Type type, object value, Stream stream, HttpContentHeaders contentHeaders, TransportContext transportContext)
{
// Retrieve value for isGetRequest somehow...
if (value is IEnumerable && isGetRequest)
{
throw new InvalidOperationException();
}
...
}
}
可能是因为已添加GetPerRequestFormatterInstance方法,并且可以覆盖该方法:
public class CustomFormatter : MediaTypeFormatter
{
private HttpRequestMessage _request;
private CustomFormatter(HttpRequestMessage request)
{
_request = request;
}
public override MediaTypeFormatter GetPerRequestFormatterInstance(Type type, HttpRequestMessage request, MediaTypeHeaderValue mediaType)
{
return new CustomFormatter(request);
}
..........
因此,如果您这样做,那么在WriteToStreamAsync时,请求将有一个值。可能是因为已经添加了GetPerRequestFormatterInstance方法,并且可以被覆盖:
public class CustomFormatter : MediaTypeFormatter
{
private HttpRequestMessage _request;
private CustomFormatter(HttpRequestMessage request)
{
_request = request;
}
public override MediaTypeFormatter GetPerRequestFormatterInstance(Type type, HttpRequestMessage request, MediaTypeHeaderValue mediaType)
{
return new CustomFormatter(request);
}
..........
所以,如果您这样做,那么在WriteToStreamAsync时,请求将有一个值