updating a local database from remote db sql server programmatically

Hello,

You could do that using SQL server replication. The idea is to use features built in SQL server to allow synchronising databases located on different machines.

There is a lot of literature on SQL replication, do a google search and spend some time reading.

Here's a good start:
http://code.msdn.microsoft.com/windowsdesktop/SQL-Server-Express-05c73322[^]

And here is a code sample provided by Microsoft: (in the link above)

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;

// These namespaces are required.
using Microsoft.SqlServer.Replication;
using Microsoft.SqlServer.Management.Common;

namespace MergeAgentRMO
{
    class Program
    {
        static void Main(string[] args)
        {
            SynchronizeMergePullSubscriptionViaRMO();
        }

        static void SynchronizeMergePullSubscriptionViaRMO()
        {
            // Define the server, publication, and database names.
            string subscriberName = "WIN8CP\\SQLEXPRESS";
            string publisherName = "WS2008R2_1";
            string distributorName = "WS2008R2_1";
            string publicationName = "TestMergePub2";
            string subscriptionDbName = "TestSubDB1";
            string publicationDbName = "AdventureWorksLT";

            // Create a connection to the Subscriber.
            ServerConnection conn = new ServerConnection(subscriberName);

            MergePullSubscription subscription;
            MergeSynchronizationAgent agent;

            try
            {
                // Connect to the Subscriber.
                conn.Connect();

                // Define the pull subscription.
                subscription = new MergePullSubscription();
                subscription.ConnectionContext = conn;
                subscription.DatabaseName = subscriptionDbName;
                subscription.PublisherName = publisherName;
                subscription.PublicationDBName = publicationDbName;
                subscription.PublicationName = publicationName;

                // If the pull subscription exists, then start the synchronization.
                if (subscription.LoadProperties())
                {
                    // Get the agent for the subscription.
                    agent = subscription.SynchronizationAgent;

                    // Set the required properties that could not be returned
                    // from the MSsubscription_properties table.
                    agent.PublisherSecurityMode = SecurityMode.Integrated;
                    agent.DistributorSecurityMode = SecurityMode.Integrated;
                    agent.Distributor = publisherName;

                    // Enable verbose merge agent output to file.
                    agent.OutputVerboseLevel = 4;
                    agent.Output = "C:\\TEMP\\mergeagent.log";

                    // Synchronously start the Merge Agent for the subscription.
                    agent.Synchronize();
                }
                else
                {
                    // Do something here if the pull subscription does not exist.
                    throw new ApplicationException(String.Format(
                        "A subscription to '{0}' does not exist on {1}",
                        publicationName, subscriberName));
                }
            }
            catch (Exception ex)
            {
                // Implement appropriate error handling here.
                throw new ApplicationException("The subscription could not be " +
                    "synchronized. Verify that the subscription has " +
                    "been defined correctly.", ex);
            }
            finally
            {
                conn.Disconnect();
            }
        }
    }
}

Valery.