C# 向ExpandooObject动态添加嵌套属性

我得到了一个JSON对象（可能包含多个级别的JSON数组等等），我想将其转换为ExpandooObject

我知道如何在运行时将简单属性添加到ExpandoObject，因为它实现了IDictionary，但如何在运行时添加嵌套属性（例如，

myexpando.somelist.anotherlist.someitem

），这样可以正确解析

编辑：目前，这适用于简单（一级）属性：

var exo = new ExpandoObject() as IDictionary<String, Object>;
exo.Add(name, value);

var exo=new ExpandoObject（）作为IDictionary；
外部添加（名称、值）；

---

问题是如何嵌套名称并相应解析ExpandooObject。

这样做怎么样：

var exo = new ExpandoObject() as IDictionary<String, Object>;
var nested1 = new ExpandoObject() as IDictionary<String, Object>;

exo.Add("Nested1", nested1);
nested1.Add("Nested2", "value");

dynamic d = exo;
Console.WriteLine(d.Nested1.Nested2); // Outputs "value"

var exo=new ExpandoObject（）作为IDictionary；
var nested1=作为IDictionary的新ExpandooObject（）；
exo.Add（“嵌套1”，嵌套1）；
嵌套1.添加（“嵌套2”，“值”）；
动态d=exo；
Console.WriteLine（d.Nested1.Nested2）；//输出“值”

当调用

TryGetValue

时，可以通过存储对以前检索到的对象或字典的引用来实现这一点。我使用的类如下所示：

public DynamicFile(IDictionary<string, object> dictionary)
{
    if (dictionary == null)
        throw new ArgumentNullException("dictionary");
    _dictionary = dictionary;
    _lastGetRef = _dictionary;
}

private readonly IDictionary<string, object> _dictionary;
private IDictionary<string, object> _lastGetRef;

public override bool TryGetMember(GetMemberBinder binder, out object result)
{
    if (!_dictionary.TryGetValue(binder.Name, out result))
    {
        result = null;
        return true;
    }

    var dictionary = result as IDictionary<string, object>;
    if (dictionary != null)
    {
        result = new DynamicFile(dictionary);
        _lastGetRef = dictionary;
        return true;
    }

    return true;
}

public override bool TrySetMember(SetMemberBinder binder, object value)
{
    if(_dictionary.ContainsKey(binder.Name))
        _dictionary[binder.Name] = value;
    else if (_lastGetRef.ContainsKey(binder.Name))
        _lastGetRef[binder.Name] = value;
    else
        _lastGetRef.Add(binder.Name, value);

    return true;
}

您可能可以在

TryGetMember

中编写一些代码，在密钥不存在时自动添加字典，但我不需要它，所以我没有添加它。

非常简单

dynamic myexpando = new ExpandoObject();
myexpando.somelist = new ExpandoObject() as dynamic;
myexpando.somelist.anotherlist = new ExpandoObject() as dynamic;
myexpando.somelist.anotherlist.someitem = "Hey Hey There! I'm a nested value :D";

扩展

public static class ObjectExtension
{
    public static ExpandoObject ToExpando(this object source)
    {
        IDictionary<string, object> anonymousDictionary = new RouteValueDictionary(source);

        IDictionary<string, object> expando = new ExpandoObject();

        foreach (var item in anonymousDictionary)
            expando.Add(item);

        return (ExpandoObject)expando;
    }
}

    public IActionResult Client(string username)
    {
        var client = HttpContext.Items["profile"] as Client;

        var model = new
        {
            client.Id,
            client.Name,
            client.Surname,
            client.Username,
            client.Photo,
            CoverPhoto = new {
               client.CoverPhoto.Source,
               client.CoverPhoto.X
            }.ToExpando(),
        }.ToExpando();

        return View(model);
    }

Client.cshtml

<img id="cover-photo" src="@Model.CoverPhoto.Source" />

---

Alex，考虑到你前面的问题，我认为你需要的是DynamicObject而不是ExpandoObject。See及其应用

<img id="cover-photo" src="@Model.CoverPhoto.Source" />