C# Parameter Examples


C# Parameter Examples

In the C# interface, parameters are grouped by datatype into three enums: GRB.DoubleParam, GRB.IntParam, and GRB.StringParam. You would refer to the integer Threads parameter as GRB.IntParam.Threads.

To modify a parameter, you use GRBEnv.Set. Recall that models get their own environments once they are created, so you'll generally need to get the environment for a model before setting a parameter on that model.

To set the TimeLimit parameter for a model, you'd do:

  GRBModel m = ...;
  m.GetEnv().Set(GRB.DoubleParam.TimeLimit, 100.0);

You can also set the value of a parameter using strings for the parameter name and desired value. For example:

  GRBModel m = ...;
  m.GetEnv().Set("TimeLimit", "100.0");

Use GRBEnv.Get to query the current value of a parameter:

  currentlimit = m.GetEnv().Get(GRB.DoubleParam.TimeLimit);