I have an abstract class 'Server' which I create in my JavaScript in my UI and then I want to have a method on my Web Service which does the following:
public List<Database> GetDatabases(Server server)
{
Type type = server.GetType();
Server x = null;
if (typeof (SqlServer2005Server).Equals(type))
{
x = new SqlServer2005Server();
}
// Return the Databases from the server
return x.GetDatabases();
}
The issue I am having is that Server can not be deserialized as it is abstract, Do I need to have a method for each Server I have which inherits from the concrete type ie
public List<Database> GetDatabases(SqlServer2005Server server)
{
// Return the Databases from the server
return SqlServer2005Serverx.GetDatabases();
}
public List<Database> GetDatabases(OracleServer server)
{
// Return the Databases from the server
return SqlServer2005Serverx.GetDatabases();
}
I would really appreciate your help as i am not sure what is the best solution
The exact error I receive is:
Instances of abstract classes cannot be created.
WCF will support inheritance, but you need to decorate your data contract with the known type attibute. For example:
[DataContract]
[KnownType(typeof(Customer))]
class Contact
{
[DataMember]
public string FirstName
{get;set;}
[DataMember]
public string LastName
{get;set;}
}
[DataContract]
class Customer : Contact
{
[DataMember]
public int OrderNumber
{get;set;}
}
HTH.
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