Question

我试图使用https://github.com/MrRoundRobin/telegram.bot编写电报机器人，它是Telegram Bots的C＃api。

编译后的程序在Windows上运行没有任何问题，但是当尝试在Raspbian Linux（ARM处理器上的Debian）上使用Mono运行它时，它崩溃了

System.MissingMethodException: Method 'DateTimeOffset.FromUnixTimeSeconds' not found.
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable

加上整个堆栈跟踪的剩余部分。 telegram.bot方法使用Newtonsoft.Json显然序列化请求/反序列化响应。

Mono JIT compiler version 4.2.2 (Stable 4.2.2.30/996df3c Fri Jan 00:48:14 UTC 2016)

任何帮助都将不胜感激。

Answer 1

它在旧的.Net版本中缺少DateTimeOffset.FromUnixTimeSeconds因为在Net 4.6中添加了这个扩展，我也会告诉MrRR修复后向兼容性，但是你的prj .Net版本可能是更低，也似乎你从方法中使用等待使用，所以它会抛出异常。

顺便说一下，你可以做些事情，

1：最常见的

        try
        {
            // your code
            var result = await bot.SendPhoto(id, file);
        }
        catch (Exception ex)
        {
            // handleing code
        }

或更多，如您所知，更准确：

        try
        {
            // your code
            var result = await bot.SendPhoto(id, file);
        }

        //-- Because this exception is a kind of AggregateExceptions
        catch (AggregateException ex) 
        // for C# 6.0 you can use when (somehow)
        // catch (AggregateException ex) when (something to check  Method not found)
        {
            // handleing code
        }

2：你自己添加一个扩展程序（我还没有检查过）

尝试将具有精确“FromUnixTimeSeconds”的扩展添加到DateTimeOffset，并使用相同的返回值实现该方法。要知道如何更好地实现它，例如.Net 4.6可以使用：https://msdn.microsoft.com/en-us/library/system.datetimeoffset.fromunixtimeseconds(v=vs.110).aspx

和ofc这是基本异常，某些人的完整堆栈跟踪可以帮助更多地了解这一点：

   Method not found: 'System.DateTimeOffset System.DateTimeOffset.FromUnixTimeSeconds(Int64)'.
   at Telegram.Bot.Helpers.UnixDateTimeConverter.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.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.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 System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.ReadFromStream(Type type, Stream readStream, Encoding effectiveEncoding, IFormatterLogger formatterLogger)
   at System.Net.Http.Formatting.JsonMediaTypeFormatter.ReadFromStream(Type type, Stream readStream, Encoding effectiveEncoding, IFormatterLogger formatterLogger)
   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.ReadFromStream(Type type, Stream readStream, HttpContent content, IFormatterLogger formatterLogger)
   at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.ReadFromStreamAsync(Type type, Stream readStream, HttpContent content, IFormatterLogger formatterLogger)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at System.Net.Http.HttpContentExtensions.<ReadAsAsyncCore>d__0`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()
   at Telegram.Bot.Api.<SendWebRequest>d__106`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at [Your Project and line code]

希望这些可以帮助你

如果您需要知道为什么会发生这种情况并且可以提供更多相关信息

Mono MissingMethodException：找不到DateTimeOffset.FromUnixTimeSeconds

1 个答案: