VB.Net 将匿名类型序列化为 xml

Question

在 MVC 中，我可以执行类似以下操作，将具有匿名类型的对象序列化为 JSON...

    Public Function GetStateList() As JsonResult
        Dim MyObject = New With {.Id = 1, .Property = "SomeValue"}
        Return Me.Json(MyObject)
    End Function

这将返回类似的内容；

{
    "Id": 1,
    "Property"SomeValue",
}

我想做完全相同的事情，但输出 xml。我还没有找到等效的方法。有人能指出我正确的方向吗？

非常感谢

Answer 1

简而言之，您不能，请参阅此帖子。我建议您创建一个具体类型来表示匿名输出的结构，然后使用正常的 XML 序列化技术，如我在下面提供的示例。

下面是如何使用它的基本示例（抱歉，它是 C# 语法）：

using (MemoryStream memStream = new MemoryStream())
{
    System.Text.UTF8Encoding utf8 = new System.Text.UTF8Encoding(); 
    // read and convert to byte array
    XmlSerializer serializer = new XmlSerializer( <<yourObject>>.GetType() ); 
    serializer.Serialize( memStream, <<yourObject>>)); 
    string output = utf8.GetString( memStream.ToArray() );
}

Answer 2

根据詹姆斯的回答，没有本地方法可以做到这一点。使用 Reflector，我检查了 System.Web.MVC.dll，并了解了 MVC 是如何做到这一点的。核心代码如下。

Private Sub SerializeCustomObject(ByVal o As Object, ByVal sb As StringBuilder, ByVal depth As Integer, ByVal objectsInUse As Hashtable, ByVal serializationFormat As SerializationFormat)
    Dim flag As Boolean = True
    Dim type As Type = o.GetType
    sb.Append("{"c)
    If (Not Me.TypeResolver Is Nothing) Then
        Dim str As String = Me.TypeResolver.ResolveTypeId(type)
        If (Not str Is Nothing) Then
            JavaScriptSerializer.SerializeString("__type", sb)
            sb.Append(":"c)
            Me.SerializeValue(str, sb, depth, objectsInUse, serializationFormat)
            flag = False
        End If
    End If
    Dim info As FieldInfo
    For Each info In type.GetFields((BindingFlags.Public Or BindingFlags.Instance))
        If Not info.IsDefined(GetType(ScriptIgnoreAttribute), True) Then
            If Not flag Then
                sb.Append(","c)
            End If
            JavaScriptSerializer.SerializeString(info.Name, sb)
            sb.Append(":"c)
            Me.SerializeValue(info.GetValue(o), sb, depth, objectsInUse, serializationFormat)
            flag = False
        End If
    Next
    Dim info2 As PropertyInfo
    For Each info2 In type.GetProperties((BindingFlags.GetProperty Or (BindingFlags.Public Or BindingFlags.Instance)))
        If Not info2.IsDefined(GetType(ScriptIgnoreAttribute), True) Then
            Dim getMethod As MethodInfo = info2.GetGetMethod
            If ((Not getMethod Is Nothing) AndAlso (getMethod.GetParameters.Length <= 0)) Then
                If Not flag Then
                    sb.Append(","c)
                End If
                JavaScriptSerializer.SerializeString(info2.Name, sb)
                sb.Append(":"c)
                Me.SerializeValue(getMethod.Invoke(o, Nothing), sb, depth, objectsInUse, serializationFormat)
                flag = False
            End If
        End If
    Next
    sb.Append("}"c)
End Sub

它相当不言自明，并且很容易转换。