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我有以下 Json，我希望在 vb.net 中循环并提取问题和结果。我尝试使用 Newtonsoft.json，但尽管 JSONlint 验证了 Json，但我得到了错误。实现这一目标的正确方法是什么？

{
    "Vehicle_Check": [
        19,
        {
            "question": "Brakes",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Water Levels",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Horn",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Washers",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Wipers",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Indicators",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Reflectors",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Oil Levels",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Lights",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Mirrors",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Steering",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Tyres Wheels",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Battery",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Fuel or Oil Leaks",
            "result": "OK",
            "Fault": ""
        },
        {
            "question": "Other",
            "result": "OK",
            "Fault": ""
        }
    ]
}

我用来解析 Json 的代码是：

Dim o As JObject = JObject.Parse(VCItem.Check)
Dim results As List(Of JToken) = o.Children().ToList
For Each item As JProperty In results
    item.CreateReader()
    Select Case item.Name
        'process data here
    End Select
Next

这仅返回最后一个元素：

{[
    19,
    {
        "question": "Other",
        "result": "OK",
        "Fault": ""
    }
]}
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1 回答 1

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实际上它是返回第一个和最后一个元素。鉴于您发布的内容，19 是数组中的第一项，无论如何这都不合适。

试试这个（是的，我知道它看起来很可怕）但我还必须从列表中删除 19，因为它不是对象而是字符串。您的数组中有不同的类型，如果必须保留，您需要测试字符串。我正在研究一种更好的方式来自己阅读 JSON，但它花费的时间比我希望的要长。

    Dim o As JObject = JObject.Parse(VCItem)
    Dim results As List(Of JToken) = o.Children().ToList
    For Each item As JProperty In results
        item.CreateReader()
        If item.Value.Type = JTokenType.Array Then
            Dim results2 As List(Of JToken) = item.Value.ToList
            For Each subitem As JObject In results2
                Dim results3 As List(Of JToken) = subitem.Children().ToList
                For Each temp2 As JProperty In results3
                    temp2.CreateReader()
                    MsgBox(temp2.Name)
                    MsgBox(temp2.Value)
                Next
            Next
        End If
    Next

找到了一种更简单的方法来显示您的值，但仍然取决于 JSON 字符串的结构（在这里找到了更简单的方法：How to Parse Json children in VB.NET Newtonsoft）

    Dim o As JObject = JObject.Parse(VCItem)
    Dim results As List(Of JToken) = o.Children().ToList
    For Each item As JProperty In results
        item.CreateReader()
        If item.Value.Type = JTokenType.Array Then
            For Each subitem As JObject In item.Values
                MsgBox(subitem("question"))
                MsgBox(subitem("result"))
                MsgBox(subitem("Fault"))
            Next
        End If
    Next
于 2014-04-09T09:06:12.387 回答