根据JObject

时间:2016-12-31 19:52:52

标签: c# json json.net .net-core

我有一个平面文件系统(字段的固定长度定义 - 我无法更改此遗留系统),其中序列顺序对于写入平面文件很重要。我试图基于JObject内的序列值获得一个JObject。我有以下JSON对象:

{
    APPOINTMENT_ID: {
        value: '',
        seqPos: 1,
        dbSize: 2,
        dbType: 'C',
        xpath: 'DataSet0'   
        },
    NAME: {
        value: '',
        seqPos: 2,
        dbSize: 30,
        dbType: 'C',
        xpath: 'DataSet1'
    },
    DATE: {
        value: '',
        seqPos: 3,
        dbSize: 10,
        dbType: 'M',
        xpath: 'DataSet2'
    }
}

目前我在循环索引和JSON中进行匹配,然后设置JOBject。

JObject joOuter = null;
for (int i = 1; i <= joNode.Count; i++)
{
    foreach (var jT in joNode)
    {
        if (i == jT.Value["seqPos"].Value<int>())
        {
            joOuter = jT.Value.Value<JObject>();
            break;
        }
    }
    // Do Work on the JObect
    joOuter["value"] = "doProcess";
}

我想在1循环而不是当前的嵌套代码中执行此操作,而不更改整个JSON并将密钥重新调整为序列位置。

1 个答案:

答案 0 :(得分:1)

我会将这些JObject复制到字典中......

var jObj = JObject.Parse(jsonstr);
var dict = jObj.Properties().Select(x => x.Value)
               .ToDictionary(x => (int)x["seqPos"], x => x);

//loop or access the objects by their index
dict[2]["value"] = "somevalue";

//see, jObj is changed accordingly....
var debug = jObj.ToString(Newtonsoft.Json.Formatting.Indented);