How to notify a windows service(c#) of a DB Table Change(sql 2005)?

Question

I have a table with a heavy load(many inserts/updates/deletes) in a SQL2005 database. I\'d like to do some post processing for all these changes in as close to real time as

Answer 1

In similar circumstances we are using CLR trigger that is writing messages to the queue (MSMQ). Service written in C# is monitoring the queue and doing post-processing. In our case it is all done on the same server, but you can send those messages directly to the remote queue, on a different machine, totally bypassing "local listener".

The code called from trigger looks like this:

public static void SendMsmqMessage(string queueName, string data)
{
    //Define the queue path based on the input parameter.
    string QueuePath = String.Format(".\\private$\\{0}", queueName);

    try
    {
        if (!MessageQueue.Exists(QueuePath))
            MessageQueue.Create(QueuePath);

        //Open the queue with the Send access mode
        MessageQueue MSMQueue = new MessageQueue(QueuePath, QueueAccessMode.Send);

        //Define the queue message formatting and create message
        BinaryMessageFormatter MessageFormatter = new BinaryMessageFormatter();
        Message MSMQMessage = new Message(data, MessageFormatter);

        MSMQueue.Send(MSMQMessage);
    }
    catch (Exception x)
    {
        // async logging: gotta return from the trigger ASAP
        System.Threading.ThreadPool.QueueUserWorkItem(new WaitCallback(LogException), x);
    }
}