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Solver Foundation LINQ to SQL example

Erwin, a modeling consultant and top Solver Foundation user, encountered some problems trying to do two-way data binding using DataTable objects.  There are more details on this discussion thread.  Ross, a member of the Solver Foundation team, was kind enough to code up a workaround for Erwin's example.  In addition to this CS file, you will need to create a new DBML file called SampleDataContext, as I described in a previous post.

 using System;
using System.Collections.Generic;
using System.Linq;
using System.Data;
using System.Data.OleDb;
using System.Data.Linq;
using System.Text;
using Microsoft.SolverFoundation.Services;
using System.IO;
 
namespace OML1
{
    class Test
    {
        static void Main(string[] args)
        {
            Test t = new Test();
            t.Solve();
        }
 
        // Holds the OML model
        string strModel = @"Model[
              Parameters[Sets,I],
              Parameters[Reals,p[I]],
 
              Decisions[Reals[0,Infinity],x[I]],
 
              Constraints[
                 Foreach[{i,I}, x[i]==p[i]]
              ]
           ]";
 
 
        //  SFS
        SolverContext context;
        SampleDataContext data;
 
 
        //  Constructor
        public Test()
        {
            context = SolverContext.GetContext();
            data = new SampleDataContext("Data Source=Sql_server_name;Initial Catalog=DataPartitionAllocation20_5;Integrated Security=True");
            context.DataSource = data;
        }
 
 
        // Solve the problem
        public void Solve()
        {
            context.LoadModel(FileFormat.OML, new StringReader(strModel));
 
            Parameter p = context.CurrentModel.Parameters.First(q => q.Name == "p");
            p.SetBinding(data.P, "value", new string[] { "index" });
 
            Decision x = context.CurrentModel.Decisions.First(d => d.Name == "x");
            x.SetBinding(data.X, "value", new string[] { "index" }); 
 
            Solution solution = context.Solve();
            Console.Write("{0}", solution.GetReport());
 
            context.PropagateDecisions();
 
        }
 
    }
 
}

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