我遇到了将时间值反序列化为LocalTime-授权的问题,我对NodaTime很新。我想导入一个Web服务结果,该结果以“HH:mm”格式列出时间。除非我以“hh:mm:ss.fff”格式使用时间,否则我会收到异常。有没有办法指定不同的模式并让“HH:mm”起作用?
请参阅此代码
using System;
using System.Collections.Generic;
using Newtonsoft.Json;
using NodaTime;
using NodaTime.Serialization.JsonNet;
using NodaTime.Text; // Required for LocalTimePattern
namespace TestNodaTime
{
class MyObject
{
[JsonProperty("var1")]
public int MyProperty { get; set; }
[JsonProperty("time")]
public LocalTime MyTime { get; set; }
}
class Program
{
static void Main(string[] args)
{
string serializedObject1 = "[{\"var1\":\"42\",\"time\":\"01:02:03.004\"}]";
string serializedObject2 = "[{\"var1\":\"42\",\"time\":\"01:02\"}]";
JsonSerializerSettings jss = new JsonSerializerSettings();
jss.ConfigureForNodaTime(DateTimeZoneProviders.Bcl);
// This works - the pattern is "hh:mm:ss.fff"
MyObject mo1 = JsonConvert.DeserializeObject<List<MyObject>>(serializedObject1, jss)[0];
// This causes an exception - the pattern is "HH:mm"
MyObject mo2 = JsonConvert.DeserializeObject<List<MyObject>>(serializedObject2, jss)[0];
/*
* An unhandled exception of type 'NodaTime.Text.UnparsableValueException' occurred in Newtonsoft.Json.dll
* Additional information: The value string does not match a quoted string in the pattern.
* Value being parsed: '01:02^'. (^ indicates error position.)
*/
}
}
}
抛出异常:
NodaTime.Text.UnparsableValueException was unhandled HResult=-2146233033 Message=The value string does not match a quoted string in the pattern. Value being parsed: '01:02^'. (^ indicates error position.) Source=NodaTime StackTrace: at NodaTime.Text.ParseResult`1.GetValueOrThrow() at NodaTime.Text.ParseResult`1.get_Value() at NodaTime.Serialization.JsonNet.NodaPatternConverter`1.ReadJsonImpl(JsonReader reader, JsonSerializer serializer) at NodaTime.Serialization.JsonNet.NodaConverterBase`1.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, Object target) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList(IList list, JsonReader reader, JsonArrayContract contract, JsonProperty containerProperty, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonSerializer.Deserialize(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings) at TestNodaTime.Program.Main(String[] args) at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() InnerException:
答案 0 :(得分:7)
您需要删除调用ConfigureForNodaTime时添加的默认转换器。这些转换器使用默认formats并且不可配置(据我所知)。
JsonSerializerSettings jss = new JsonSerializerSettings();
jss.ConfigureForNodaTime(DateTimeZoneProviders.Bcl);
jss.Converters.Remove(NodaConverters.LocalTimeConverter);
jss.Converters.Add(new NodaPatternConverter<LocalTime>(LocalTimePattern.CreateWithInvariantCulture("HH':'mm")));
MyObject mo2 = JsonConvert.DeserializeObject<List<MyObject>>(serializedObject2, jss)[0];