未找到属性反序列化yaml错误

Question

我使用c#， YamlDotNet和以下的例子:如何用YAMLDotNet反序列化YAML ?

但是我得到以下错误:

Exception thrown: 'YamlDotNet.Core.YamlException' in YamlDotNet.dll
YamlDotNet.Core.YamlException: (Line: 1, Col: 1, Idx: 0) - (Line: 1, Col: 1, Idx: 0): Exception during deserialization ---> System.Runtime.Serialization.SerializationException: Property 'PlatForm' not found on type 'NAC21_Calculator.UserSoft'.
at YamlDotNet.Serialization.TypeInspectors.TypeInspectorSkeleton.GetProperty(Type type, Object container, String name, Boolean ignoreUnmatched)
at YamlDotNet.Serialization.NodeDeserializers.ObjectNodeDeserializer.YamlDotNet.Serialization.INodeDeserializer.Deserialize(IParser parser, Type expectedType, Func`3 nestedObjectDeserializer, Object& value)
at YamlDotNet.Serialization.ValueDeserializers.NodeValueDeserializer.DeserializeValue(IParser parser, Type expectedType, SerializerState state, IValueDeserializer nestedObjectDeserializer)
--- End of inner exception stack trace ---
at YamlDotNet.Serialization.ValueDeserializers.NodeValueDeserializer.DeserializeValue(IParser parser, Type expectedType, SerializerState state, IValueDeserializer nestedObjectDeserializer)
at YamlDotNet.Serialization.ValueDeserializers.AliasValueDeserializer.DeserializeValue(IParser parser, Type expectedType, SerializerState state, IValueDeserializer nestedObjectDeserializer)
at YamlDotNet.Serialization.Deserializer.Deserialize(IParser parser, Type type)
at YamlDotNet.Serialization.Deserializer.Deserialize[T](IParser parser)
at YamlDotNet.Serialization.Deserializer.Deserialize[T](TextReader input)
at NAC21_Calculator.YamlImporter.Deserialize(String yamlName) in D:UserInput.cs:line 124
at NAC21_Calculator.UserInput.GenerateBut_click(Object sender, EventArgs e) in D:UserInput.cs:line 68
The program '[20556] NAC21_Calculator.exe' has exited with code 0 (0x0).

yaml文件内容为:

PlatForm: windows
Version: 10
# Software Info
SOFTWARE:
Software-01:
NAME    : MFS2020
VERSION : 1.12.2015
Customized  : true
Software-02:
NAME    : DCS
VERSION : 6
Customized  : false

对象定义:

public class UserSoft
{
public List<string> PlatForm { get; set; }
public List<string> Version { get; set; }
public List<software> SOFTWARE { get; set; }
public class software
{
public string NAME { get; set; }
public string VERSION { get; set; }
public string Customized { get; set; }
}
}

和按下按钮时执行反序列化:

private void GenerateBut_click(object sender, EventArgs e)
{
UserSoft obj = YamlImporter.Deserialize("file_template.yml");
Console.WriteLine("Platform: {0}", obj.PlatForm);
Console.WriteLine("Version: {0}", obj.Version);
foreach (var soft in obj.SOFTWARE)
Console.WriteLine("Software: {0}", soft);
}
catch (Exception Ex)
{
Console.WriteLine(Ex.ToString());
}
}

public class YamlImporter
{
public static UserSoft Deserialize(string yamlName)
{
StreamReader sr = new StreamReader(yamlName);
string text = sr.ReadToEnd();
var input = new StringReader(text);
var deserializer = new DeserializerBuilder().WithNamingConvention(CamelCaseNamingConvention.Instance).Build();
UserSoft deserializeObject = deserializer.Deserialize<UserSoft>(input); /* compile error */
return deserializeObject;
}
}

我是c#的新手，这个问题是唯一真正阻碍我的问题。提前谢谢。

Answer 1

这里有几个问题。

首先，您的PlatForm和Version属性类型为List<string>，但值只是一个字符串。

其次，你的SOFTWARE属性并不代表一个列表，而是一个映射——字符串"Software-01"one_answers";Software-02"是映射中的有效键。

第三，您已经明确声明要使用驼峰命名约定进行反序列化，但是您的YAML实际上并没有使用该约定。

下面是一个最小的，完整的例子，纠正了这些方面:

using System;
using System.Collections.Generic;
using System.IO;
using YamlDotNet.Serialization;
public class UserSoft
{
public string PlatForm { get; set; }
public string Version { get; set; }
public Dictionary<string, software> SOFTWARE { get; set; }
public class software
{
public string NAME { get; set; }
public string VERSION { get; set; }
public string Customized { get; set; }
}
}
class Program
{
static void Main(string[] args)
{
string text = File.ReadAllText("test.yaml");
var deserializer = new DeserializerBuilder().Build();
UserSoft deserialized = deserializer.Deserialize<UserSoft>(text);
Console.WriteLine($"Platform: {deserialized.PlatForm}");
Console.WriteLine($"Version: {deserialized.Version}");
foreach (var pair in deserialized.SOFTWARE)
{
var value = pair.Value;
Console.WriteLine($"{pair.Key}: Name={value.NAME}; Version={value.VERSION}; Customized={value.Customized}");
}
}
}

输出:

Platform: windows
Version: 10
Software-01: Name=MFS2020; Version=1.12.2015; Customized=true
Software-02: Name=DCS; Version=6; Customized=false

作为题外话，我强烈建议您尽量保持大小写一致，并遵循。net命名约定。