I want to pass a collection of ids to a stored procedure that will be mapped using NHibernate. This technique was introduced in Sql Server 2008 ( more info here => Table-Val
A simpler solution than the accepted answer would be to use ADO.NET. NHibernate allows users to enlist IDbCommands into NHibernate transactions.
DataTable myIntsDataTable = new DataTable();
myIntsDataTable.Columns.Add("ID", typeof(int));
// ... Add rows to DataTable
ISession session = sessionFactory.GetSession();
using(ITransaction transaction = session.BeginTransaction())
{
IDbCommand command = new SqlCommand("StoredProcedureName");
command.Connection = session.Connection;
command.CommandType = CommandType.StoredProcedure;
var parameter = new SqlParameter();
parameter.ParameterName = "IntTable";
parameter.SqlDbType = SqlDbType.Structured;
parameter.Value = myIntsDataTable;
command.Parameters.Add(parameter);
session.Transaction.Enlist(command);
command.ExecuteNonQuery();
}