C# API examples

This section lists a few examples in C#. These are the same files that can be found in the examples directory of the distribution, and show the basic usage of the C# API.

Example 1: First steps

firstexample.cs

This example shows how to

  • read an AMPL model

  • reassign values to parameters

  • solve the model

  • display the objective function value

Example 2: Get and set AMPL options

optionsexample.cs

This example shows how to:

  • get and set AMPL options

Example 3: Use AMPL asynchronously

asyncexample.cs

This example shows how to:

  • set a callback for AMPL async operation (implementing ampl::Runnable)

  • start and interrupt async operations

Example 4: Get and set data through DataFrames

dataframeexample.cs

This example shows how to:

  • Use ampl::DataFrame objects to assign values to sets and parameters

  • Use an ampl::DataFrame object to fetch and decouple values from a variable

Example 5: Operate with multidimensional data

multidimensionalexample.cs

This example shows how to:

  • Use a ampl::DataFrame to assign values to multidimensional parameters

Example 6: Assign all data to a model and solve it

dietmodel.cs

This example shows how to:

  • Assign all the data necessary to generate a model instance programmatically

Example 7: Build an efficient frontier

efficientfrontier.cs

This example shows how to:

  • build an efficient frontier by repeteatly solve a portfolio problem in AMPL

Example 8: Simple heuristic

trackingmodel.cs

This example shows how to:

  • Do a simple heuristics for solving a QMIP problem, using the relaxed solution as a hint

Example 9: Simple heuristic

trackingmodel.cs

This example shows how to:

  • Do a simple heuristics for solving a QMIP problem, using the relaxed solution as a hint

Example 10: Redirecting output and error messages

OutputAndErrorRedirectionExample.cs

This example shows how to:

  • Redirect the output and error messages from the underlying AMPL interpreter