public static int Main(string[] args)
{
string modelDirectory = ((args != null) && (args.Length > 0)) ? args[0]
: "../../models";
string solver = ((args != null) && (args.Length > 1)) ? args[1] : null;
/*
* // If the AMPL installation directory is not in the system search path:
* ampl.Environment env = new ampl.Environment(
* "full path to the AMPL installation directory");
* // Create an AMPL instance
* using (AMPL a = new AMPL(env)) {}
*/
using (AMPL ampl = new AMPL())
{
if (solver != null)
{
ampl.SetOption("solver", solver);
}
ampl.SetOption("reset_initial_guesses", true);
ampl.SetOption("send_statuses", false);
ampl.SetOption("relax_integrality", true);
// Load the AMPL model from file
ampl.Read(modelDirectory + "/qpmv/qpmv.mod");
ampl.Read(modelDirectory + "/qpmv/qpmvbit.run");
// set tables directory (parameter used in the script above)
ampl.GetParameter("data_dir").Set(modelDirectory + "/qpmv");
// Read tables
ampl.ReadTable("assetstable");
ampl.ReadTable("astrets");
// set the output handler to accumulate the output messages
ampl.Output += Ampl_Output;
// Create the callback object
Console.WriteLine("Main thread: Model setup complete. Solve on worker thread.");
// Initiate the async solution process, passing the callback as a parameter. The Action
// below will be executed by the AMPL API when the solution process will be completed.
ampl.SolveAsync(() => Callback());
// Wait for the solution to complete (achieved by waiting on the AutoResetEvent waitHandle
Console.WriteLine("Main thread: Waiting for solution to end...\n");
var start = DateTime.Now;
waitHandle.WaitOne();
var duration = DateTime.Now - start;
Console.WriteLine("Main thread: done waiting.");
// At this stage, the AMPL process is done, the message "Solution process ended." has been
// printed on the console by the callback and we print a second confirmation from the main thread
Console.WriteLine("Main thread: waited for {0}", duration.ToString());
// Print the objective value
Console.WriteLine("Main thread: cost: {0}", ampl.GetValue("cst").Dbl);
}
return(0);
}