NHibernate拦截器->带参数的输出查询

Question

How do I implement an Interceptor that outputs the query WITH parameters? I have searched the web and stackoverflow for a long time now and haven´t found an answer to my problem. My Custom Interceptor-Class looks like this at the moment:

public class SQLDebugOutput : EmptyInterceptor, IInterceptor {
        public override NHibernate.SqlCommand.SqlString OnPrepareStatement(NHibernate.SqlCommand.SqlString sql) {
            System.Diagnostics.Debug.WriteLine("NH: " + sql.ToString());
            return base.OnPrepareStatement(sql);
        }
}

The parameters in the query are displayed as questionmarks though and I need them for debugging purposes. Also I´d prefer a solution not using the Log4Net Logger.

So, is it possible at all to retrieve the parameter values of a query using an interceptor at all? Maybe by overriding other methods of it?

Answer 1

The SqlString type that's supplied as a parameter to the OnPrepareStatement method has a GetParameters() method that returns a collection of Parameter objects. Looking at the code suggests it should be possible to interrogate these objects and, hopefully, find what you're looking for.