Sample Session-State Store Provider - Microsoft Example

Question

I'm trying to implement a Session-State Provider using this sample from Microsoft:

http://msdn.microsoft.com/en-us/library/ms178589.aspx

But I can't compile it, because .NET throws this errors:

Error   1   
'Project.Session.OdbcSessionStateStore' does not implement inherited abstract member     'System.Web.SessionState.SessionStateStoreProviderBase.CreateNewStoreData(System.Web.HttpContext, int)'

Error   2   'Project.Session.OdbcSessionStateStore.CreateNewStoreData(System.Web.HttpContext, double)' is a new virtual member in sealed class 'Project.Session.OdbcSessionStateStore'

Error   3   'Project.Session.OdbcSessionStateStore.CreateNewStoreData(System.Web.HttpContext, double)': no suitable method found to override

Exact piece of code with CreateNewStoreData override:

    //
    // SessionStateProviderBase.CreateNewStoreData
    //

    public override SessionStateStoreData CreateNewStoreData(
      HttpContext context,
      double timeout)
    {
        return new SessionStateStoreData(new SessionStateItemCollection(),
          SessionStateUtility.GetSessionStaticObjects(context),
          (int)timeout);
    }

Answer 1

From your MSDN link, class OdbcSessionStateStore is inheriting from SessionStateStoreProviderBase abstract class. Click Here for more info

As you will have to override all abstract methods from an abstract class (except if the class that you create is also an abstract class), in this example you will need to override the abstract method CreateNewStoreData. Click Here for more info

When overriding the method signatures should match. In the sample code from your MSDN link the signature is

public override SessionStateStoreData CreateNewStoreData(
      HttpContext context,
      double timeout)

where as in the actual case it should have been

public override SessionStateStoreData CreateNewStoreData(
    HttpContext context,
    int timeout
)

Note the difference double timeout instead of int timeout