如何将字符串值属性序列化为字符串数组 [英] How to serialize a string-valued property as a string array

问题描述

我有一堂课

Public Class ExtraInfo
   Property extratypes As String
End Class

我有一个提交的表单，赋值的值是字符串，从表单提交的数据是字符串，而不是数组:

I have a form submitted and the value assign is string, the data submitted from form is string not array:

extratypes = '1,2';

现在，当我将文件另存为json时:

Now when I save into the database as json:

Newtonsoft.Json.JsonConvert.SerializeObject(edited)

它在json中给了我

{"extratypes":"1,2"}

在像下面那样保存它之前，如何操作它为字符串数组:

How can I manipulate it to string array before saving it like the one below:

{"extratypes":["1","2"]}

推荐答案

您可以使用代理属性，该属性将字符串与数组进行转换.使用 [JsonIgnore] 装饰原始属性，并使用 [JsonProperty("extratypes")] .如果方便的话，可以将代理属性设置为私有，只要它具有[JsonProperty]属性，就会对其进行序列化:

You could use a proxy property that translates your string to and from an array. Decorate the original property with [JsonIgnore] and the proxy with [JsonProperty("extratypes")]. You can make the proxy property private if that's convenient and Json.NET will serialize it as long as it has the [JsonProperty] attribute:

Public Class ExtraInfo

    <JsonIgnore()> _
    Public Property extratypes As String

    <JsonProperty("extratypes")> _
    Private Property extratypesArray As String()
        Get
            If extratypes Is Nothing Then
                Return Nothing
            End If
            Return extraTypes.Split(","c)

        End Get

        Set(ByVal value As String())
            If value Is Nothing Then
                extratypes = Nothing
            Else
                extratypes = String.Join(","c, value)
            End If
        End Set
    End Property

End Class

示例小提琴.

其他选择是编写您自己的 JsonConverter .

Other option would be to write your own JsonConverter.

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