PagedList< T>的Newtonsoft.Json序列化.不包括某些属性 [英] Newtonsoft.Json serialization of PagedList<T> is not including some properties

问题描述

我正在尝试序列化PagedList对象( https://github.com/martijnboland/MvcPaging/blob/master/src/MvcPaging/PagedList.cs )发送给Json，就像这样:

I am trying to serialize a PagedList object ( https://github.com/martijnboland/MvcPaging/blob/master/src/MvcPaging/PagedList.cs ) to Json, like this:

PagedList<Product> pagedList = new PagedList<Product>(products, (page - 1), pageSize);
string json = Newtonsoft.Json.JsonConvert.SerializeObject(pagedList);

如果使用上面的代码，结果将得到正确序列化的Product对象数组.但是，(PagedList的)以下属性未包含在Json结果中:

If I use the above code, in the result I get an array of Product objects serialized properly. However the properties below (of PagedList) are not being included in the Json result:

    public bool HasNextPage { get; }
    public bool HasPreviousPage { get; }
    public bool IsFirstPage { get; }
    public bool IsLastPage { get; }
    public int ItemEnd { get; }
    public int ItemStart { get; }
    public int PageCount { get; }
    public int PageIndex { get; }
    public int PageNumber { get; }
    public int PageSize { get; }
    public int TotalItemCount { get; }

它们没有被序列化，但是它们是PagedList的一部分.

They are not being serialized but they are part of PagedList.

有人知道为什么吗?以及如何在序列化中包含这些属性?

Does anyone know why? And how could I include those properties in the serialization?

谢谢

推荐答案

序列化程序发现PagedList是可枚举的，因此将其序列化为JavaScript数组.为了使其更易于处理，我在PagedList对象上公开了一个GetMetaData()函数，该函数将返回一个MetaData对象，该对象完全包含您上面提到的字段.这意味着您可以像这样序列化您的页面列表:

The serializer sees that PagedList is enumerable, so it serializes it to a JavaScript array. To make this easier to deal with I expose a GetMetaData() function on the PagedList object that will return a MetaData object containing exactly the fields you mentioned above. This means you can serialize your pagedlist like so:

string json = Newtonsoft.Json.JsonConvert.SerializeObject(new{
  items = pagedList,
  metaData = pagedList.GetMetaData()
});

这将导致像这样的JSON对象:

This should result in a JSON object like so:

{
    "Items": [
        { ... },
        { ... },
        { ... }
    ],
    "MetaData": {
        "PageSize": 1,
        "PageCount": 2,
        "HasNextPage": true,
        ...
    }
}

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