Trying to add a service reference results in Bad Request (400) in one project, otherwise runs fine

Question

I\'m in a delicate situation: As the title suggests, I can\'t seem to connect to a WCF service I wrapped up in a Windows Service. I followed the tutorial http://msdn.microso

Answer 1

For anyone who is encountering similar issues without detailed error, I'll describe what my problem was about. In my Visual Studio project, I used a class similar to the following:

public class Info
{
  public string Key { get; set; }
  public string Value { get; set; }

  public Info(string key, string value)
  {
    this.Key = key;
    this.Value = value;
  }
}

The difference to the other project (which worked) is that this POCO has a constructor that takes parameters, thus doesn't provide a standard constructor without any arguments. But this is needed in order for Info objects to be serialized (I hope I use that term correctly here) and deserialized. So in order to make it work, either just add a standard constructor which may just do nothing, or (perhaps better) use the following instead:

[DataContract]
public class Info
{
  [DataMember]
  public string Key { get; set; }
  [DataMember]
  public string Value { get; set; }

  public Info(string key, string value)
  {
    this.Key = key;
    this.Value = value;
  }
}

I didn't think about the DataContract part before, because I didn't use any custom constructor and just initialized the objects like

Info info = new Info { Key = "a", Value = "b" };