Example: Reading an MPS file

using System;
using System.IO;
using Imsl.Math;

public class MPSReaderEx1
{
    public static void  Main(String[] args)
    {
        FileStream aFile = File.OpenRead("testprob.mps");
        StreamReader sr = new StreamReader(aFile);
        MPSReader mps = new MPSReader();
        mps.Read(sr);

        Console.Out.WriteLine(mps.Name);
        Console.Out.WriteLine(mps.NameRHS);
        Console.Out.WriteLine(mps.NameBounds);
        Console.Out.WriteLine(mps.NameRanges);

        int nRows = mps.NumberOfRows;
        System.Console.Out.WriteLine("NumberOfConstraints " + nRows);
        for (int i = 0; i < nRows; i++)
        {
            System.Console.Out.WriteLine("   " + mps.GetLowerRange(i) + 
                                " <= row[" + i + "] = " + mps.GetNameRow(i) + 
                                " <= " + mps.GetUpperRange(i));
        }
        
        int nColumns = mps.NumberOfColumns;
        System.Console.Out.WriteLine("NumberOfColumns " + nColumns);
        for (int i = 0; i < nColumns; i++)
        {
            System.Console.Out.WriteLine("   " + mps.GetLowerBound(i) + 
                                " <= var[" + i + "] = " + mps.GetNameColumn(i) + 
                                " <= " + mps.GetUpperBound(i));
        }
        
        System.Console.Out.WriteLine("NumberOfNonZeros " + mps.NumberOfNonZeros);
        for (int iRow = 0; iRow < nRows; iRow++)
        {
            System.Console.Out.WriteLine("       row " + mps.GetNameRow(iRow));
            System.Collections.IEnumerator iter = mps.GetRow(iRow).Iterator();
            while (iter.MoveNext())
            {
                MPSReader.Element elem = (MPSReader.Element) iter.Current;
                int iColumn = elem.Column;
                System.String nameColumn = mps.GetNameColumn(iColumn);
                System.Console.Out.WriteLine("          " +
               nameColumn + ": " + elem.Value);
            }
        }
    }
}

Output

TESTPROB
RHS1
BND1

NumberOfConstraints 3
   -Infinity <= row[0] = LIM1 <= 5
   10 <= row[1] = LIM2 <= Infinity
   7 <= row[2] = MYEQN <= 7
NumberOfColumns 3
   0 <= var[0] = XONE <= 4
   -1 <= var[1] = YTWO <= 1
   0 <= var[2] = ZTHREE <= Infinity
NumberOfNonZeros 6
       row LIM1
          XONE: 1
          YTWO: 1
       row LIM2
          XONE: 1
          ZTHREE: 1
       row MYEQN
          YTWO: -1
          ZTHREE: 1