Question

我需要动态创建JToken。必须通过某个对象的字符串字段构造Brand p["properties"]["brand"][0]属性。我希望能够将其放在文本框中：["properties"]["dog"][0]并让它成为品牌选择。

到目前为止，我的选择硬编码如下：

JObject o = JObject.Parse(j);
JArray a = (JArray)o["products"];

var products = a.Select(p => new Product
{
    Brand = (string)p["properties"]["brand"][0]
}

但是我需要这样的东西：

JObject o = JObject.Parse(j);
JArray a = (JArray)o["products"];
string BrandString = "['descriptions']['brand'][0]";

var products = a.Select(p => new Product
{
    Brand = (string)p[BrandString]
}

这有可能吗？

Answer 1

查看SelectToken方法。听起来这就是你要找的东西，虽然路径语法与你建议的有点不同。这是一个例子：

public class Program
{
    public static void Main(string[] args)
    {
        string j = @"
        {
          ""products"": [
            {
              ""descriptions"": {
                ""brand"": [ ""abc"" ]
              }
            },
            {
              ""descriptions"": {
                ""brand"": [ ""xyz"" ]
              }
            }
          ]
        }";

        JObject o = JObject.Parse(j);
        JArray a = (JArray)o["products"];
        string brandString = "descriptions.brand[0]";

        var products = a.Select(p => new Product
        {
            Brand = (string)p.SelectToken(brandString)
        });

        foreach (Product p in products)
        {
            Console.WriteLine(p.Brand);
        }
    }
}

class Product
{
    public string Brand { get; set; }
}

输出：

abc
xyz

小提琴：https://dotnetfiddle.net/xZfPBQ

动态生成JToken对象

1 个答案: