Class GurobiSolver

A wrapper class to access Gurobi as a solver

Inheritance
System.Object
GurobiSolver
Inherited Members
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
Namespace: OPTANO.Modeling.Optimization.Solver.Gurobi45
Assembly: Optimization.Solver.Gurobi45.dll
Syntax
public class GurobiSolver : ISolver, ICanSolve<Model, Solution>, IAbortable, ICanManipulateANativeSolver, IDisposable, IStatus<StatusInfo>

Constructors

GurobiSolver(GurobiSolverConfiguration)

Initializes a new instance of the GurobiSolver class.

Declaration
public GurobiSolver(GurobiSolverConfiguration configuration = null)
Parameters
Type Name Description
GurobiSolverConfiguration configuration

The configuration.

Properties

Configuration

The configuration of this solver instance.

Declaration
public SolverConfiguration Configuration { get; set; }
Property Value
Type Description
SolverConfiguration
Implements

IsBusy

Gets a value indicating whether the OPTANO.Modeling.Optimization.Solver is busy.

Declaration
public bool IsBusy { get; }
Property Value
Type Description
System.Boolean

Methods

Abort()

If this solver instance IsBusy, abort the run as soon as possible, or do nothing if this solver instance is not busy.

Declaration
public void Abort()
Implements
Exceptions
Type Condition
System.NotSupportedException

If this solver instance does not support aborting.

ChangeConstraintLowerBound(String, Double)

Changes the constraint's lower bound.

Declaration
public void ChangeConstraintLowerBound(string name, double lowerbound)
Parameters
Type Name Description
System.String name

The name of the Constraint that should be altered.
System.Double lowerbound

The lowerbound.

ChangeConstraintUpperBound(String, Double)

Changes the constraint's upper bound.

Declaration
public void ChangeConstraintUpperBound(string name, double upperbound)
Parameters
Type Name Description
System.String name

The name of the Constraint that should be altered.
System.Double upperbound

The upperbound.

ClearLastModel()

Deletes the internal datastructures of this OPTANO.Modeling.Optimization.Solver instance.

Declaration
public void ClearLastModel()
Implements
Exceptions
Type Condition
System.InvalidOperationException

If this OPTANO.Modeling.Optimization.Solver instance IsBusy.

Dispose()

Disposes the solver instance.

Declaration
public void Dispose()
Implements
System.IDisposable.Dispose()

Dispose(Boolean)

Declaration
protected void Dispose(bool freeManagedObjectsAlso)
Parameters
Type Name Description
System.Boolean freeManagedObjectsAlso

Finalize()

Finalizes an instance of the GurobiSolver class.

Declaration
protected void Finalize()

GetSubOptimalSolution(Int32)

The get sub optimal solution.

Declaration
public Dictionary<string, double> GetSubOptimalSolution(int n)
Parameters
Type Name Description
System.Int32 n

The index of the solution that is queried.
Returns
Type Description
System.Collections.Generic.Dictionary<System.String, System.Double>

The solution values, identified by Name.
Exceptions
Type Condition
System.ArgumentException

Thrown, if there are less than n suboptimal solutions.

Solve(Model, IDictionary<String, Double>)

Solves the specified model. If specified in CopySolutionToModel, the results of a solved Model will automatically be written in the OPTANO.Modeling's Variables.

Declaration
public Solution Solve(Model model, IDictionary<string, double> variableValues = null)
Parameters
Type Name Description
Model model

The Model to solve.
System.Collections.Generic.IDictionary<System.String, System.Double> variableValues

The starting values to pass as initial solution.
Returns
Type Description
Solution

The Solution. Before accessing the VariableValues, make sure that the Model is Feasible and the Solution is Feasible or Optimal.

Events

Status

The status callback during the solution process.

Declaration
public event Action<StatusInfo> Status
Event Type
Type Description
System.Action<StatusInfo>
Implements

Extension Methods