Using the Environment Class



Click here for a larger image.

Environment: .NET, C#

The .NET Framework takes a much different approach to the Environment than Windows. There is a class called Environment, part of the System namespace. The documentation states:

Use this class to retrieve the following information:

  • Command line arguments
  • Exit codes
  • Environment variable settings
  • Contents of the call stack
  • Time since last system boot
  • Version of the common language runtime

Besides getting all or a particular environment variable(s), there are other objects available. Most objects are read only, and there is no method to set or add a variable. As far as I can tell, only CurrentDirectory and ExitCode can be changed. There is no method to add or modify the environment variables. The most interesting thing I noticed when coding the example C# program was the way GetEnvironmentVariables() worked. The method returns an IDictionary object that represents a collection of key-and-value pairs. Another interesting method is GetFolderPath, which retrieves paths to various system folders.

//-----------------------------------------------------------

The following is a C# example of how to retrieve all environment variables.

case 0:
  IDictionary id;
  String sString;

  ArrayList values = new ArrayList();

  m_env_list.Items.Clear ();
  id = Environment.GetEnvironmentVariables();
  foreach (DictionaryEntry myEntry in id)
  {
    sString = myEntry.Key.ToString();
    sString += "=";
    sString += myEntry.Value.ToString();
    m_env_list.Items.Add(sString);
  }
  m_env_list.SetSelected(0, true);
  m_env_list_SelectedIndexChanged(this,null);
  break;
//-----------------------------------------------------------

Downloads

Download source - 24 Kb


Comments

  • There are no comments yet. Be the first to comment!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Snapshot-based data protection solutions were supposed to solve our backup challenges, weren't they? Then why are your backups still broken? Many issues with snapshots point to a need for better snapshot creation and management capabilities, to make backup and recovery more intelligent and more likely to succeed. If your snapshots are manually managed or of the "build-it-yourself" variety, there may be several reasons that they aren't working very well. Read this white paper to learn the five reasons why your …

  • By now you've likely heard of Agile development and building products in small incremental pieces, so you can get real feedback along the way. In fact, you may even be considering using Agile on your next project. But where do you start? Agile can take a lot of forms, such as Scrum or Kanban. Each form has advantages and disadvantages, but both will help your team get the right feedback they need to build great products. Read this white paper to find out which one is right for you.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date