Question

我正在使用以下代码段来处理JSON请求。

 <WebMethod(Description:="Gets the Categories")> _
    <ScriptMethod(ResponseFormat:=ResponseFormat.Json)> _
    Public Function GetCategories() As String
        Using ds As DataSet = db.ExecuteDataSet(CommandType.Text, "SELECT NodeID,NodeName FROM Nodes WHERE ParentID='1'")
            ' Create a multidimensional jagged array
            Dim JaggedArray As String()() = New String(ds.Tables(0).Rows.Count - 1)() {}
            Dim i As Integer = 0
            For Each rs As DataRow In ds.Tables(0).Rows
                JaggedArray(i) = New String() {rs("NodeName").ToString(), rs("NodeID").ToString()}
                i = i + 1
            Next

            ' Return JSON data
            Dim js As New JavaScriptSerializer()
            Dim strJSON As String = js.Serialize(JaggedArray)
            Return strJSON
        End Using
    End Function

我得到的回复：

<string xmlns="http://localhost:54511/">
[["Books","BK01"],["Computers","CO01"],["Gaming","GA01"],["Mobile & Accessories","MO01"]]
</string>

为什么我得不到key ??

例如：

<string xmlns="http://localhost:54511/">
[{"nodename":"Books","nodeid":"BK01"},{"nodename":"Computers","nodeid":"CO01"},{"nodename":"Gaming","nodeid":"GA01"},{"nodename":"Mobile & Accessories","nodeid":"MO01"}]
</string>

Answer 1

那是因为你正在序列化一个数组而不是一个对象，对vb.net不是很熟悉，但我相信你要找的是Dictionary( Of String, String)并将值添加为dictionary.add('nodename', rs("NodeName").ToString() ......等等

JSON中没有关键值

1 个答案: