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  • Your email address will not be published.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

  • IBM Worklight is a mobile application development platform that lets you extend your business to mobile devices. It is designed to provide an open, comprehensive platform to build, run and manage HTML5, hybrid and native mobile apps.

  • The proliferation of cloud computing options has begun to change the way storage is thought about, procured, and used. IT managers and departments need to think through how cloud options might fit into and complement their onsite data infrastructures. This white paper explains cloud storage and backup, providing advice about the tools and best practices for its implementation and use. Read this white paper for some useful takeaways about how to take advantage of cloud storage for high availability, backup and …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds