FICO Xpress Optimization Examples Repository: Save/access a postsolved solution in memory

FICO Xpress Optimization Examples Repository

Save/access a postsolved solution in memory

Description

We take the knapsack problem in burglar.mps and initiate a tree search. Whenever an integer solution it found it is postsolved, stored in memory, and printed to an output file. The best and final solution values, and other tree search information, are displayed on screen.

Difficulty rating: 2 (easy-medium)

savesol_dnet.zip

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Source Files

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SaveSol.cs	[download]
SaveSol.csproj	[download]

Data Files

burglar.mps

[download]

SaveSol.csproj

<?xml version="1.0" encoding="UTF-8" standalone="no"?><Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>

    <IsPackable>false</IsPackable>
    <XpressExampleFiles Condition="'$(XpressExampleFiles)'==''">../../data</XpressExampleFiles>
  </PropertyGroup>

  <ItemGroup>
    <Content Include="$(XpressExampleFiles)/burglar.mps">
	    <CopyToOutputDirectory>Always</CopyToOutputDirectory>
    </Content>
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="FICO.Xpress.XPRSdn" Version="47.1.1"/> <!-- Version 47.01.01 or later -->
  </ItemGroup>

  <!-- This is for execution with "dotnet run" and friends which runs from the project directory rather than the output directory. -->
  <Target AfterTargets="AfterBuild" Name="CopyExampleData">
    <Copy DestinationFolder="$(ProjectDir)" SourceFiles="$(XpressExampleFiles)/burglar.mps"/>
  </Target>

</Project>