asp.net core 3.0 JObject The collection type 'Newtonsoft.Json.Linq.JObject' is not supported
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2023-08-31 08:50:51
在asp.net core 3.0 中,如果直接在 中返回 类型,会抛出如下错误: The collection type 'Newtonsoft.Json.Linq.JObject' is not supported. System.NotSupportedException: The colle ......
在asp.net core 3.0 中,如果直接在controller
中返回 jobject
类型,会抛出如下错误:
the collection type 'newtonsoft.json.linq.jobject' is not supported. system.notsupportedexception: the collection type 'newtonsoft.json.linq.jobject' is not supported. at system.text.json.jsonpropertyinfonotnullable`4.getdictionarykeyandvaluefromgenericdictionary(writestackframe& writestackframe, string& key, object& value) at system.text.json.jsonpropertyinfo.getdictionarykeyandvalue(writestackframe& writestackframe, string& key, object& value) at system.text.json.jsonserializer.handledictionary(jsonclassinfo elementclassinfo, jsonserializeroptions options, utf8jsonwriter writer, writestack& state) at system.text.json.jsonserializer.write(utf8jsonwriter writer, int32 originalwriterdepth, int32 flushthreshold, jsonserializeroptions options, writestack& state) at system.text.json.jsonserializer.writeasynccore(stream utf8json, object value, type inputtype, jsonserializeroptions options, cancellationtoken cancellationtoken) at microsoft.aspnetcore.mvc.formatters.systemtextjsonoutputformatter.writeresponsebodyasync(outputformatterwritecontext context, encoding selectedencoding) at microsoft.aspnetcore.mvc.formatters.systemtextjsonoutputformatter.writeresponsebodyasync(outputformatterwritecontext context, encoding selectedencoding) at microsoft.aspnetcore.mvc.infrastructure.resourceinvoker.<invokenextresultfilterasync>g__awaited|29_0[tfilter,tfilterasync](resourceinvoker invoker, task lasttask, state next, scope scope, object state, boolean iscompleted) at microsoft.aspnetcore.mvc.infrastructure.resourceinvoker.rethrow(resultexecutedcontextsealed context) at microsoft.aspnetcore.mvc.infrastructure.resourceinvoker.resultnext[tfilter,tfilterasync](state& next, scope& scope, object& state, boolean& iscompleted) at microsoft.aspnetcore.mvc.infrastructure.resourceinvoker.invokeresultfilters() --- end of stack trace from previous location where exception was thrown --- at microsoft.aspnetcore.mvc.infrastructure.resourceinvoker.<invokefilterpipelineasync>g__awaited|19_0(resourceinvoker invoker, task lasttask, state next, scope scope, object state, boolean iscompleted) at microsoft.aspnetcore.mvc.infrastructure.resourceinvoker.<invokeasync>g__awaited|17_0(resourceinvoker invoker, task task, idisposable scope) at microsoft.aspnetcore.routing.endpointmiddleware.<invoke>g__awaitrequesttask|6_0(endpoint endpoint, task requesttask, ilogger logger)
该问题的出现估计与.net 3.0 新引入的system.text.json
类库有关.
折衷的解决办法是:
使用content
方法将 jobject
类型的返回值转为 contentresult
类型.
伪代码如下:
[httppost] public contentresult method1([frombody]param param1) { jobject result=xxx; return content(result.tostring()); }
如果有时间,建议跟一下system.text.json
类库的源码来彻底解决该问题.
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