Web API Not Returning NULL Properties in JSON

When calling a web api where there are null values, the return object drops the property. I have read many articles on-line that talk about the problem being fixed with the new release but it did not work for me. After looking around and testing a few options I found a very easy fix. The below code is a sample code from a real application.

[code language=”vb”]
For Each t In NewsData
NewsItemList.Add(New NewsList(Date.ToString("MM/dd/yyyy"), t._id, t.Caption, _
t.Article, t.PublishPeriod, t.isActive))
Public Class NewsList
Public Property DatePosted As Date
Public Property _id As Integer
Public Property Caption As String
Public Property Article As String
Public Property PublishPeriod As String
Public Property isActive As Boolean

Public Sub New(ByVal DatePosted As Date, ByVal _id As Integer, ByVal Caption As String, _
ByVal Article As String, ByVal PublishPeriod As String, ByVal isActive As Boolean)

Me.DatePosted = DatePosted
Me._id = _id
Me.Caption = Caption
Me.Article = Article
Me.PublishPeriod = PublishPeriod
Me.isActive = isActive
End Sub

The important part of these lines of code is adding a ‘Required()’ attribute. (Line 14)

[code language=”vb”]

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David Bauernschmidt

I live in the historical triangle of Virginia where I am married with two daughters. I have spent over 13 years working for a Fortune 500 company in the computer area. I started in VB 6.0 and by the time I ended my employment I was supervising a development team where we built many web applications. When my first daughter was born I wanted to spend more time with her so I left and became a programmer analyst for local government as well as launch my own company. Since then I have grown James River Webs into a profitable web design and application company helping small businesses create a big presence on the internet. As an employee I have created web application used by citizens and other companies. I enjoy fly fishing, and spending time with my family. I also enjoy learning new approaches and development tools when it comes to developing applications.

One Comment on Web API Not Returning NULL Properties in JSON

  1. The problem might be caused by having PHP magic quotes on.

    Ensure this configuration is in your php.ini:
    magic_quotes_gpc = Off

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