在JArray中向Json中添加元素

Question

我一直在尝试在满足条件时将元素添加到jarray JToken中。我想要实现的是如下所示。然而，下面的add语句没有编译，但传达了我需要尝试和执行的操作。有人知道怎么做吗?

        string json = @"[
        {""1"":""One"",""2"":""AddThree""},
        {""1"":""One"",""2"":""Two""},
        {""1"":""One"",""2"":""AddThree""}
        ]";
        JArray rows = JArray.Parse(json);
        int length = rows.Count;
        for (int i = 0; i < length; i++)
        {
            string s = rows[i]["2"].ToString();
            if (s == "AddThree")
            {
                //This functionality doesnt exist
                rows[i].Children().ADD(@"""3"":""Three""");
            }
        }
        Console.WriteLine(rows.ToString());
        Console.ReadKey();

Answer 1

如果该元素不存在，Json将在设置该元素时创建该元素。

    string json = @"[
    {""1"":""One"",""2"":""AddThree""},
    {""1"":""One"",""2"":""Two""},
    {""1"":""One"",""2"":""AddThree""}
    ]";
    JArray rows = JArray.Parse(json);
    foreach (var row in rows)
    {
        string s = row["2"].ToString();
        if (s == "AddThree")
        {
            row["3"] = "Three";
        }
    }
    Console.WriteLine(rows.ToString());
    Console.ReadKey();

Answer 2

你能检查一下这是否有效吗?

将rows[i].Children().ADD(@"""3"":""Three""");更改为

rows[i].Children().Add(JToken.Parse(@"""3"":""Three"""));