I am currently utilizing WebMethods to retrieve an array of a custom class. When this array is returned from a Jquery .ajax call, it gets serialized into a JSON object that can be utilized with Javascript in my ASP.NET application. The issue I am facing is that if any of the attributes of the Sale class are set to null (Nothing), they end up being serialized as "null" strings in the JSON object. It would be preferable for them to display as empty strings instead. While I am aware that I can create a cleanup method to convert nulls to empty strings, I am seeking a way to establish a default behavior so that null values are automatically converted to empty strings.
Here is an example of how my code is structured:
<WebMethod()> _
Public Function GetData(ByVal SaleType As String) As Sale()
Return DataLayer.GetSalesByType(SaleType)
End Function
Class Sale
Public Property Type as String
Public Property InvoiceNumber as String
End Class