//updates objective and variable
public void populate_lblObj()
{
lblObj.Text = "";
MyGlobals.model.Update();
//objective function
int int_sense = MyGlobals.model.Get(GRB.IntAttr.ModelSense);
if (int_sense == -1)
{
lblObj.Text = "MAXIMIZE";
}
else if (int_sense == 1)
{
lblObj.Text = "MINIMIZE";
}
GRBLinExpr func = (GRBLinExpr)MyGlobals.model.GetObjective();
for (int i = 0; i < func.Size; i++)
{
lblObj.Text = lblObj.Text + " " + func.GetCoeff(i) + func.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
//populate variables present in obj
GRBLinExpr con_info = (GRBLinExpr)MyGlobals.model.GetObjective();
Dictionary <string, GRBVar> D = new Dictionary <string, GRBVar>();
GRBVar var;
for (int i = 0; i < con_info.Size; i++)
{
var = con_info.GetVar(i);
D.Add(con_info.GetVar(i).Get(GRB.StringAttr.VarName), var);
}
// Bind combobox(edit var) to dictionary
cmbVarName2.DataSource = new BindingSource(D, null);
cmbVarName2.DisplayMember = "Key";
cmbVarName2.ValueMember = "Value";
// Bind combobox(delet var) to dictionary
cmbVarName3.DataSource = new BindingSource(D, null);
cmbVarName3.DisplayMember = "Key";
cmbVarName3.ValueMember = "Value";
//populate all variables combobox addvar
GRBVar[] allVar = MyGlobals.model.GetVars();
Dictionary <string, GRBVar> D2 = new Dictionary <string, GRBVar>();
for (int i = 0; i < allVar.Length; i++)
{
D2.Add(allVar[i].Get(GRB.StringAttr.VarName), allVar[i]);
}
// Bind combobox(add new var) to dictionary
cmbAddVar.DataSource = new BindingSource(D2, null);
cmbAddVar.DisplayMember = "Key";
cmbAddVar.ValueMember = "Value";
}
private void btn_Update2_Click(object sender, EventArgs e)
{
try
{
double var_coco;
double.TryParse(txtCoeff2.Text, out var_coco);
MyGlobals.model.ChgCoeff(constraint, variable, var_coco);
MyGlobals.model.Update();
populate_cmbConstraint();
BtnOK.Enabled = true;
BtnCancel.Enabled = false;
lblUpdate2.Text = "";
lblUpdate2.Text = constraint.Get(GRB.StringAttr.ConstrName) + ": ";
GRBLinExpr con_info = (GRBLinExpr)MyGlobals.model.GetRow(constraint);
for (int n = 0; n < con_info.Size; n++)
{
lblUpdate2.Text += " " + con_info.GetCoeff(n) + con_info.GetVar(n).Get(GRB.StringAttr.VarName) + " +";
}
lblUpdate2.Text += " " + constraint.Get(GRB.CharAttr.Sense) + " " + constraint.Get(GRB.DoubleAttr.RHS) + "\n";
}
catch (GRBException exc)
{
MessageBox.Show("Error code: " + exc.ErrorCode + ". " + exc.Message, "Error occured", MessageBoxButtons.OK);
}
txtVarName.Clear();
txtlb.Clear();
txtub.Clear();
}
private void ObjItem_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
{
GRBLinExpr func = (GRBLinExpr)MyGlobals.model.GetObjective();
if (func.Size != 0)
{
txtObj.Visible = true;
lblObj.Visible = true;
lblObj.Text = "";
//objective function
int int_sense = MyGlobals.model.Get(GRB.IntAttr.ModelSense);
if (int_sense == -1)
{
lblObj.Text = "MAXIMIZE";
}
else if (int_sense == 1)
{
lblObj.Text = "MINIMIZE";
}
for (int i = 0; i < func.Size; i++)
{
lblObj.Text = lblObj.Text + " " + func.GetCoeff(i) + func.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
}
else
{
MessageBox.Show("You have not added any objective function!");
}
}
//DELETE Variable
private void cmbCon5_SelectedIndexChanged(object sender, EventArgs e)
{
constraint = ((KeyValuePair <string, GRBConstr>)cmbCon5.SelectedItem).Value;
GRBLinExpr con_info = (GRBLinExpr)MyGlobals.model.GetRow(constraint);
Dictionary <string, GRBVar> D = new Dictionary <string, GRBVar>();
GRBVar var;
for (int i = 0; i < con_info.Size; i++)
{
var = con_info.GetVar(i);
D.Add(con_info.GetVar(i).Get(GRB.StringAttr.VarName), var);
}
// Bind combobox(delete var) to dictionary
cmbVarName3.DataSource = new BindingSource(D, null);
cmbVarName3.DisplayMember = "Key";
cmbVarName3.ValueMember = "Value";
}
public override bool SetObj(object solver, int Column, double Value)
{
GRBModel grbSolver = solver as GRBModel;
if (grbSolver == null)
{
return(false);
}
GRBLinExpr exp = grbSolver.GetObjective() as GRBLinExpr;
exp.AddTerm(Value, exp.GetVar(Column));
return(true);
}
//Add variable
private void btnUpdate_Click(object sender, EventArgs e)
{
{
try
{
//change GRBConst into GRBConst[]
GRBConstr[] CON = new GRBConstr[1];
CON[0] = constraint;
double var_coco;
double.TryParse(txtAddCon.Text, out var_coco);
//change double into double[]
Double[] COEFF = new Double[1];
COEFF[0] = var_coco;
//add variable to constraint
MyGlobals.model.ChgCoeff(constraint, variable, var_coco);
MyGlobals.model.Update();
populate_cmbConstraint();
BtnOK.Enabled = true;
BtnCancel.Enabled = false;
lblUpdate.Text = "";
lblUpdate.Text = constraint.Get(GRB.StringAttr.ConstrName) + ": ";
GRBLinExpr con_info = (GRBLinExpr)MyGlobals.model.GetRow(constraint);
for (int n = 0; n < con_info.Size; n++)
{
lblUpdate.Text += " " + con_info.GetCoeff(n) + con_info.GetVar(n).Get(GRB.StringAttr.VarName) + " +";
}
lblUpdate.Text += " " + constraint.Get(GRB.CharAttr.Sense) + " " + constraint.Get(GRB.DoubleAttr.RHS) + "\n";
}
catch (GRBException exc)
{
MessageBox.Show("Error code: " + exc.ErrorCode + ". " + exc.Message, "Error occured", MessageBoxButtons.OK);
}
}
}
public void if_obj_loaded()
{
//IF OBJ IS ALREADY SET
int int_sense = MyGlobals.model.Get(GRB.IntAttr.ModelSense);
GRBLinExpr func = (GRBLinExpr)MyGlobals.model.GetObjective();
if ((int_sense == -1) || (int_sense == 1))
{
if (func.Size != 0)
{
lblObj.Text = "";
lblSense.Text = "";
if (int_sense == -1)
{
lblSense.Text = "MAXIMIZE";
cmbSense.Text = "MAXIMIZE";
}
else if (int_sense == 1)
{
lblSense.Text = "MINIMIZE";
cmbSense.Text = "MINIMIZE";
}
for (int i = 0; i < func.Size; i++)
{
lblObj.Text = lblObj.Text + " " + func.GetCoeff(i) + func.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
cmbSense.Enabled = false;
cmbVarName.Enabled = false;
txtCoeff.Enabled = false;
btn_Undo.Enabled = false;
button7.Enabled = false;
btnClear.Enabled = false;
btnAddTerm.Enabled = false;
btnOK.Enabled = true;
btnNext.Enabled = true;
}
}
}
private void btnUpdate_4_Click(object sender, EventArgs e)
{
double RHS;
double.TryParse(txtRHS.Text, out RHS);
constraint.Set(GRB.DoubleAttr.RHS, RHS);
MyGlobals.model.Update();
populate_cmbConstraint();
BtnOK.Enabled = true;
BtnCancel.Enabled = false;
lblUpdate4.Text = "";
lblUpdate4.Text = constraint.Get(GRB.StringAttr.ConstrName) + ": ";
GRBLinExpr con_info = (GRBLinExpr)MyGlobals.model.GetRow(constraint);
for (int n = 0; n < con_info.Size; n++)
{
lblUpdate4.Text += " " + con_info.GetCoeff(n) + con_info.GetVar(n).Get(GRB.StringAttr.VarName) + " +";
}
lblUpdate4.Text += " " + constraint.Get(GRB.CharAttr.Sense) + " " + constraint.Get(GRB.DoubleAttr.RHS) + "\n";
}
private void btnUpdate_3_Click(object sender, EventArgs e)
{
string sense = this.cmbSense.GetItemText(this.cmbSense.SelectedItem);
switch (sense)
{
case "EQUAL":
constraint.Set(GRB.CharAttr.Sense, '=');
break;
case "LESS EQUAL":
constraint.Set(GRB.CharAttr.Sense, '<');
break;
case "GREATER EQUAL":
constraint.Set(GRB.CharAttr.Sense, '>');
break;
}
//display constraint
MyGlobals.model.Update();
populate_cmbConstraint();
BtnOK.Enabled = true;
BtnCancel.Enabled = false;
lblUpdate3.Text = "";
lblUpdate3.Text = constraint.Get(GRB.StringAttr.ConstrName) + ": ";
GRBLinExpr con_info = (GRBLinExpr)MyGlobals.model.GetRow(constraint);
for (int n = 0; n < con_info.Size; n++)
{
lblUpdate3.Text += " " + con_info.GetCoeff(n) + con_info.GetVar(n).Get(GRB.StringAttr.VarName) + " +";
}
lblUpdate3.Text += " " + constraint.Get(GRB.CharAttr.Sense) + " " + constraint.Get(GRB.DoubleAttr.RHS) + "\n";
}
//new variable is added to constraint
private void btnAdd_Click(object sender, EventArgs e)
{
try
{
string var_name = txtVarName.Text;
string var_type = this.cmbVarType.GetItemText(this.cmbVarType.SelectedItem);
double var_lb, var_ub;
double var_obco, var_coco;
double.TryParse(txtlb.Text, out var_lb);
double.TryParse(txtub.Text, out var_ub);
double.TryParse(txtObCo.Text, out var_obco);
double.TryParse(txtCo_coeff.Text, out var_coco);
//change GRBConst into GRBConst[]
GRBConstr[] CON = new GRBConstr[1];
CON[0] = constraint;
//change double into double[]
Double[] COEFF = new Double[1];
COEFF[0] = var_coco;
GRBVar x;
switch (var_type)
{
case "BINARY":
if (use_infinite_ub == false)
{
x = MyGlobals.model.AddVar(var_lb, var_ub, var_obco, 'B', CON, COEFF, var_name);
}
else
{
x = MyGlobals.model.AddVar(var_lb, GRB.INFINITY, var_obco, 'B', CON, COEFF, var_name);
}
break;
case "CONTINUOUS":
if (use_infinite_ub == false)
{
x = MyGlobals.model.AddVar(var_lb, var_ub, var_obco, 'C', CON, COEFF, var_name);
}
else
{
x = MyGlobals.model.AddVar(var_lb, GRB.INFINITY, var_obco, 'C', CON, COEFF, var_name);
}
break;
case "INTERGER":
if (use_infinite_ub == false)
{
x = MyGlobals.model.AddVar(var_lb, var_ub, var_obco, 'I', CON, COEFF, var_name);
}
else
{
x = MyGlobals.model.AddVar(var_lb, GRB.INFINITY, var_obco, 'I', CON, COEFF, var_name);
}
break;
case "SEMI-CONTINUOUS":
if (use_infinite_ub == false)
{
x = MyGlobals.model.AddVar(var_lb, var_ub, var_obco, 'S', CON, COEFF, var_name);
}
else
{
x = MyGlobals.model.AddVar(var_lb, GRB.INFINITY, var_obco, 'S', CON, COEFF, var_name);
}
break;
case "SEMI-INTERGER":
if (use_infinite_ub == false)
{
x = MyGlobals.model.AddVar(var_lb, var_ub, var_obco, 'N', CON, COEFF, var_name);
}
else
{
x = MyGlobals.model.AddVar(var_lb, GRB.INFINITY, var_obco, 'N', CON, COEFF, var_name);
}
break;
}
MyGlobals.model.Update();
populate_cmbConstraint();
BtnOK.Enabled = true;
BtnCancel.Enabled = false;
lblUpdate.Text = "";
lblUpdate.Text = constraint.Get(GRB.StringAttr.ConstrName) + ": ";
GRBLinExpr con_info = (GRBLinExpr)MyGlobals.model.GetRow(constraint);
for (int n = 0; n < con_info.Size; n++)
{
lblUpdate.Text += " " + con_info.GetCoeff(n) + con_info.GetVar(n).Get(GRB.StringAttr.VarName) + " +";
}
lblUpdate.Text += " " + constraint.Get(GRB.CharAttr.Sense) + " " + constraint.Get(GRB.DoubleAttr.RHS) + "\n";
}
catch (GRBException exc)
{
MessageBox.Show("Error code: " + exc.ErrorCode + ". " + exc.Message, "Error occured", MessageBoxButtons.OK);
}
txtVarName.Clear();
txtlb.Clear();
txtub.Clear();
}
private void refresh_display()
{
//model information
lblObj.Text = "";
lblCon.Text = "";
lblOptimal.Text = "";
lblInfeasible.Text = "";
MyGlobals.model.Update();
//objective function
int int_sense = MyGlobals.model.Get(GRB.IntAttr.ModelSense);
if (int_sense == -1)
{
lblObj.Text = "MAXIMIZE";
}
else
{
lblObj.Text = "MINIMIZE";
}
GRBLinExpr func = (GRBLinExpr)MyGlobals.model.GetObjective();
for (int i = 0; i < func.Size; i++)
{
lblObj.Text = lblObj.Text + " " + func.GetCoeff(i) + func.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
//constraints
GRBConstr[] allCons = MyGlobals.model.GetConstrs();
GRBLinExpr con_info;
string co_name;
char co_sense;
double co_RHS;
int n;
for (n = 0; n < allCons.Length; n++)
{
co_name = allCons[n].Get(GRB.StringAttr.ConstrName);
co_sense = allCons[n].Get(GRB.CharAttr.Sense);
co_RHS = allCons[n].Get(GRB.DoubleAttr.RHS);
con_info = (GRBLinExpr)MyGlobals.model.GetRow(allCons[n]);
lblCon.Text += co_name + ": ";
for (int i = 0; i < con_info.Size; i++)
{
lblCon.Text += " " + con_info.GetCoeff(i) + con_info.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
lblCon.Text += " " + co_sense + " " + co_RHS + "\n";
}
// Optimize model
MyGlobals.model.Optimize();
int optimstatus = MyGlobals.model.Get(GRB.IntAttr.Status);
//If the model is infeasible or unbounded, turn off presolve and solve the model again
if (optimstatus == GRB.Status.INF_OR_UNBD)
{
MyGlobals.model.GetEnv().Set(GRB.IntParam.Presolve, 0);
MyGlobals.model.Optimize();
optimstatus = MyGlobals.model.Get(GRB.IntAttr.Status);
}
//if the model is optimal, display solution in a worksheet
if (optimstatus == GRB.Status.OPTIMAL)
{
load_optimal();
}
//if the model is infeasible, compute IIS
else if (optimstatus == GRB.Status.INFEASIBLE)
{
lblInfeasible.Text = "INFEASIBLE";
//compute IIS
lblfollowing.Visible = true;
lblRemove.Enabled = true;
lblRemove.Visible = true;
lblRemove.Text = "";
MyGlobals.model.ComputeIIS();
foreach (GRBConstr c in MyGlobals.model.GetConstrs())
{
if (c.Get(GRB.IntAttr.IISConstr) == 1)
{
lblRemove.Text += c.Get(GRB.StringAttr.ConstrName) + " ";
}
}
btnRemove.Enabled = true;
btnRemove.Visible = true;
spreadsheetControl1.Visible = false;
btn_Excel.Enabled = false;
btn_HTML.Enabled = false;
btn_PDF.Enabled = false;
btn_SaveSol.Enabled = false;
}
//if the model is unbounded
else if (optimstatus == GRB.Status.UNBOUNDED)
{
lblInfeasible.Text = "UNBOUNED\nModel cannot be solved.";
spreadsheetControl1.Visible = false;
btn_Excel.Enabled = false;
btn_HTML.Enabled = false;
btn_PDF.Enabled = false;
btn_SaveSol.Enabled = false;
}
//NEITHER INFEASIBLE, NOR OPTIMAL, NOR UNBOUNDED
else
{
lblInfeasible.Text = "Optimization stopped with \nstatus = " + optimstatus;
}
}
private void FrmAnalyze_Load(object sender, EventArgs e)
{
MyGlobals.model.Update();
//MODEL INFORMATION
lblObj.Text = "";
lblCon.Text = "";
//OBJECTIVE FUNCTION
int int_sense = MyGlobals.model.Get(GRB.IntAttr.ModelSense);
if (int_sense == -1)
{
lblObj.Text = "MAXIMIZE";
}
else
{
lblObj.Text = "MINIMIZE";
}
GRBLinExpr func = (GRBLinExpr)MyGlobals.model.GetObjective();
for (int i = 0; i < func.Size; i++)
{
lblObj.Text = lblObj.Text + " " + func.GetCoeff(i) + func.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
//CONSTRAINTS
GRBConstr[] allCons = MyGlobals.model.GetConstrs();
GRBLinExpr con_info;
string co_name;
char co_sense;
double co_RHS;
int n;
for (n = 0; n < allCons.Length; n++)
{
co_name = allCons[n].Get(GRB.StringAttr.ConstrName);
co_sense = allCons[n].Get(GRB.CharAttr.Sense);
co_RHS = allCons[n].Get(GRB.DoubleAttr.RHS);
con_info = (GRBLinExpr)MyGlobals.model.GetRow(allCons[n]);
lblCon.Text += co_name + ": ";
for (int i = 0; i < con_info.Size; i++)
{
lblCon.Text += " " + con_info.GetCoeff(i) + con_info.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
lblCon.Text += " " + co_sense + " " + co_RHS + "\n";
}
MyGlobals.model.Optimize();
//VARIABLE TYPE PIE CHART
//variables type count
int varnum = MyGlobals.model.Get(GRB.IntAttr.NumVars);
int NXnum = MyGlobals.model.Get(GRB.IntAttr.NumNZs);
int INTnum = MyGlobals.model.Get(GRB.IntAttr.NumIntVars);
int BINnum = MyGlobals.model.Get(GRB.IntAttr.NumBinVars);
int CONnum = 0;
int SEMINTnum = 0;
int SEMICONnum = 0;
GRBVar[] allVar = MyGlobals.model.GetVars();
for (int i = 0; i < allVar.Length; i++)
{
if (allVar[i].Get(GRB.CharAttr.VType) == 'C')
{
CONnum++;
}
if (allVar[i].Get(GRB.CharAttr.VType) == 'S')
{
SEMICONnum++;
}
if (allVar[i].Get(GRB.CharAttr.VType) == 'N')
{
SEMINTnum++;
}
}
Dictionary <string, int> D = new Dictionary <string, int>();
D.Add("Integer", INTnum);
D.Add("Binary", BINnum);
D.Add("Continous", CONnum);
D.Add("Semi-Integer", SEMINTnum);
D.Add("Semi-Continous", SEMICONnum);
// Create a chart.
ChartControl chartControl1 = new ChartControl();
// Create an empty Bar series and add it to the chart.
Series Series_VarType = new Series("Series1", ViewType.Pie);
chartControl1.Series.Add(Series_VarType);
// Bind chart to dictionary
Series_VarType.DataSource = new BindingSource(D, null);
// Specify data members to bind the series.
Series_VarType.ArgumentScaleType = ScaleType.Qualitative;
Series_VarType.ArgumentDataMember = "Key";
Series_VarType.ValueScaleType = ScaleType.Numerical;
Series_VarType.ValueDataMembers.AddRange(new string[] { "Value" });
// Adjust the text pattern of the series label.
PieSeriesLabel label = (PieSeriesLabel)Series_VarType.Label;
label.TextPattern = "{A}: {V:F1} ({VP:P0})";
chartControl1.PaletteName = "Flow";
chartControl1.PaletteBaseColorNumber = 0;
// Dock the chart into its parent and add it to the current form.
chartControl1.Dock = DockStyle.Bottom;
groupBox1.Controls.Add(chartControl1);
//OPTIMIZATION RESULTS
lblRuntime.Text = "";
lblSolCount.Text = "";
lblOptimal.Text = "";
lblInfeasible.Text = "";
lblRuntime.Text = "";
lblObjSol.Text = "";
lblbound.Text = "";
lblGap.Text = "";
double Runtime = MyGlobals.model.Get(GRB.DoubleAttr.Runtime);
if (MyGlobals.model.Get(GRB.IntAttr.Status) == GRB.Status.OPTIMAL)
{
double ObjSol = MyGlobals.model.Get(GRB.DoubleAttr.ObjVal);
double Bound = MyGlobals.model.Get(GRB.DoubleAttr.ObjBound);
double Gap = MyGlobals.model.Get(GRB.DoubleAttr.MIPGap);
int SolCount = MyGlobals.model.Get(GRB.IntAttr.SolCount);
lblOptimal.Text = "OPTIMAL";
lblSolCount.Text = SolCount.ToString();
lblRuntime.Text = Math.Round(Runtime, 3).ToString();
lblObjSol.Text = ObjSol.ToString();
lblbound.Text = Bound.ToString();
lblGap.Text = Gap.ToString();
}
else
{
lblInfeasible.Text = "INFEASIBLE";
lblRuntime.Text = Runtime.ToString();
}
//ALGORITHM ITERATION CHART
double simplex = MyGlobals.model.Get(GRB.DoubleAttr.IterCount);
int bar = MyGlobals.model.Get(GRB.IntAttr.BarIterCount);
double barrier = Convert.ToDouble(bar);
double branchncut = MyGlobals.model.Get(GRB.DoubleAttr.NodeCount);
Dictionary <string, double> DA = new Dictionary <string, double>();
DA.Add("Simplex Iterations", simplex);
DA.Add("Barrier Iterations", barrier);
DA.Add("Branch-n-Cut Nodes", branchncut);
// Create a chart.
ChartControl chartControl2 = new ChartControl();
// Create an empty Bar series and add it to the chart.
Series Series_Iteration = new Series("Series2", ViewType.Bar);
chartControl2.Series.Add(Series_Iteration);
// Bind chart to dictionary
Series_Iteration.DataSource = new BindingSource(DA, null);
// Specify data members to bind the series.
Series_Iteration.ArgumentScaleType = ScaleType.Qualitative;
Series_Iteration.ArgumentDataMember = "Key";
Series_Iteration.ValueScaleType = ScaleType.Numerical;
Series_Iteration.ValueDataMembers.AddRange(new string[] { "Value" });
// Adjust the text pattern of the series label.
BarSeriesLabel lbl = (BarSeriesLabel)Series_Iteration.Label;
lbl.TextPattern = "{V:F1}";
Legend legend = chartControl2.Legend;
// Display the chart control's legend.
legend.Visible = false;
chartControl2.PaletteName = "Flow";
chartControl2.PaletteBaseColorNumber = 0;
// Dock the chart into its parent and add it to the current form.
chartControl2.Dock = DockStyle.Fill;
pnl_algo.Controls.Add(chartControl2);
//COEFF STATS CHART
double MAXCOEFF = MyGlobals.model.Get(GRB.DoubleAttr.MaxCoeff);
double MINCOEFF = MyGlobals.model.Get(GRB.DoubleAttr.MinCoeff);
double MAXBOUND = MyGlobals.model.Get(GRB.DoubleAttr.MaxBound);
double MINBOUND = MyGlobals.model.Get(GRB.DoubleAttr.MinBound);
double MAXOBJCOEFF = MyGlobals.model.Get(GRB.DoubleAttr.MaxObjCoeff);
double MINOBJCOEFF = MyGlobals.model.Get(GRB.DoubleAttr.MinObjCoeff);
// Create a chart.
ChartControl chartControl3 = new ChartControl();
// Create an empty Bar series and add it to the chart.
Series Series_Coeff = new Series("Series3", ViewType.RangeBar);
// Add points to them.
Series_Coeff.Points.Add(new SeriesPoint("Matrix Coefficient", MAXCOEFF, MINCOEFF));
Series_Coeff.Points.Add(new SeriesPoint("Variable Bound", MAXBOUND, MINBOUND));
Series_Coeff.Points.Add(new SeriesPoint("Linear Obj Coefficient", MAXOBJCOEFF, MINOBJCOEFF));
chartControl3.Series.Add(Series_Coeff);
// Adjust the text pattern of the series label.
RangeBarSeriesLabel lbl2 = (RangeBarSeriesLabel)Series_Coeff.Label;
lbl2.TextPattern = "{V:F1}";
// Hide the legend (if necessary).
chartControl3.Legend.Visible = false;
chartControl3.PaletteName = "Flow";
chartControl3.PaletteBaseColorNumber = 0;
// Dock the chart into its parent and add it to the current form.
chartControl3.Dock = DockStyle.Fill;
pnl_coeff.Controls.Add(chartControl3);
}
private void btnBrowse_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "Model Files (LP)|*.LP";
if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
string ext = Path.GetExtension(openFileDialog1.FileName);
//Dispose previous model
MyGlobals.model.Dispose();
MyGlobals.env.Dispose();
lblFilename.Text = "";
lblObjective.Text = "";
lblVar.Text = "";
lblCon.Text = "";
MyGlobals.env = new GRBEnv();
MyGlobals.model = new GRBModel(MyGlobals.env, openFileDialog1.FileName);
btn_Optimize.Enabled = true;
if (ext == ".lp")
{
lblFilename.Text = openFileDialog1.FileName;
//objective function
int int_sense = MyGlobals.model.Get(GRB.IntAttr.ModelSense);
if (int_sense == -1)
{
lblObjective.Text = "MAXIMIZE";
}
else
{
lblObjective.Text = "MINIMIZE";
}
GRBLinExpr func = (GRBLinExpr)MyGlobals.model.GetObjective();
for (int i = 0; i < func.Size; i++)
{
lblObjective.Text = lblObjective.Text + " " + func.GetCoeff(i) + func.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
//variables
GRBVar[] allVars = MyGlobals.model.GetVars();
int n;
for (n = 0; n < allVars.Length; n++)
{
lblVar.Text += allVars[n].Get(GRB.StringAttr.VarName) + ", ";
}
//constraints
GRBLinExpr con_info;
GRBConstr[] allCons = MyGlobals.model.GetConstrs();
string co_name;
char co_sense;
double co_RHS;
for (n = 0; n < allCons.Length; n++)
{
co_name = allCons[n].Get(GRB.StringAttr.ConstrName);
co_sense = allCons[n].Get(GRB.CharAttr.Sense);
co_RHS = allCons[n].Get(GRB.DoubleAttr.RHS);
con_info = (GRBLinExpr)MyGlobals.model.GetRow(allCons[n]);
lblCon.Text += co_name + ": ";
for (int i = 0; i < con_info.Size; i++)
{
lblCon.Text += " " + con_info.GetCoeff(i) + con_info.GetVar(i).Get(GRB.StringAttr.VarName) + " +";
}
lblCon.Text += " " + co_sense + " " + co_RHS + "\n";
}
}
else
{
MessageBox.Show("The File is not LP.");
MyGlobals.model.Dispose();
MyGlobals.env.Dispose();
}
}
}
