反序列化Json出现错误。无法序列化类型“测试项目.Module1+products”。请考虑将其标以 DataContractAttribute 特性，并将其所有要序列化的成员标以 DataMemberAttribute 特性。如果类型为集合，则请考虑将其标以 CollectionDataContractAttribute 特性。有关其他受支持的类型，请参见 Microsoft .NET Framework 文档。

  Shared Function Json2Obj(ByVal json As String, ByVal t As Type) As Object
        Try
            Dim s = New System.Runtime.Serialization.Json.DataContractJsonSerializer(t)

            Using m As New IO.MemoryStream(System.Text.UTF8Encoding.UTF8.GetBytes(json))
                Return s.ReadObject(m)
            End Using

        Catch ex As Exception
            Throw 
        End Try
    End Function


    <System.Runtime.Serialization.DataContract()>
    Public Class products
        Public Sub New()
            Me.product_results = String.Empty
            Me.category_results = String.Empty
            Me.results_footer = String.Empty
        End Sub
        <System.Runtime.Serialization.DataMember()>
        Public Property product_results As String
        <System.Runtime.Serialization.DataMember()>
        Public Property category_results As String
        <System.Runtime.Serialization.DataMember()>
        Public Property results_footer As String
    End Class