如何在解析时过滤 JSON 中的一些结果

Question

我正在使用以下 .net 框架代码从 this page 解析 JSON：

Dim jsonString As String
       Using http As HttpClient = New HttpClient
           Dim url As String = "https://api-cloud.bitmart.com/account/v1/currencies"

           Dim streamData As Stream = Await http.GetStreamAsync(url)

           Using sr As StreamReader = New StreamReader(streamData)
               jsonString = sr.ReadToEnd
           End Using
           streamData.Close()
       End Using

       Dim jsonResponse As JObject = JObject.Parse(jsonString)
       Dim jsonData As JObject = CType(jsonResponse("data"), JObject)
       Dim jsonCurrencies As JArray = CType(jsonData("currencies"), JArray)

       Dim c As String = String.Empty
       Dim n As String = String.Empty
       For Each jsonCurrency As JObject In jsonCurrencies
           c += jsonCurrency("currency").ToString + " - " & jsonCurrency("network").ToString + vbLf

       Next
       RichTextBox1.Text += c

它工作得很好，但我认为所有的结果都是“真实的，真实的” 但现在我播种也有像

这样的结果

"withdraw_enabled":false,"deposit_enabled":false} which I really don't need to be parsed.

我感兴趣的结果首先是

"withdraw_enabled":true,"deposit_enabled":true}

在类似下面的情况下，我想解析它们，但我想知道提取和存款之间的哪一个是正确的and/or false

"withdraw_enabled":false,"deposit_enabled":true}

总结：

如果JSON是

[{"currency":"DFC","name":"DefiConnect","network":"BEP20","withdraw_enabled":true,"deposit_enabled":true},

输出是

DFC - BEP20 ( my code is already working for this case)

如果JSON是

{"currency":"HOG","name":"HOG Finance","network":"BEP20(BSC)","withdraw_enabled":true,"deposit_enabled":false},

输出应该是

HOG - BEP20(BSC) [withdraw: Yes - deposit: NO]

如果 JSON 是

{"currency":"SGE","name":"Society of Galactic Exploration","network":"ERC20","withdraw_enabled":false,"deposit_enabled":false}

我不需要解析它。

你觉得有可能吗？希望我已经清楚了。谢谢

Answer 1

您可以反序列化为实际的 class。

，而不是使用通用 JObject

    Public Class RootObject
        Public Property Message As String
        Public Property Code As Integer
        Public Property Trace As String
        Public Property Data As Data
    End Class
    
    Public Class Data
        Public Property Currencies As Currency()
    End Class

    Public Class Currency
        Public Property Currency As String
        Public Property Name As String
        Public Property Network As String
        Public Property Withdraw_enabled As Boolean
        Public Property Deposit_enabled As Boolean
    End Class

然后在您的处理过程中，只需检查属性是否为真。

    Dim root = JsonConvert.DeserializeObject(Of RootObject)(jsonString)
    Dim builder As New StringBuilder()

    For Each currency As Currency In root.Data.Currencies
        'Only consider the currency if at least one enabled is true
        If currency.Withdraw_enabled OrElse currency.Deposit_enabled Then
            builder.Append(currency.Currency)
            builder.Append(" - ")
            builder.AppendLine(currency.Network)
        End If
    Next

    RichTextBox1.Append(builder.ToString())

如何在解析时过滤 JSON 中的一些结果

How to filter some results in JSON while parsing it

.net

vb.net

json

winforms