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  • Your email address will not be published.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

  • Live Event Date: October 29, 2014 @ 11:00 a.m. ET / 8:00 a.m. PT Are you interested in building a cognitive application using the power of IBM Watson? Need a platform that provides speed and ease for rapidly deploying this application? Join Chris Madison, Watson Solution Architect, as he walks through the process of building a Watson powered application on IBM Bluemix. Chris will talk about the new Watson Services just released on IBM bluemix, but more importantly he will do a step by step cognitive …

  • Managing your company's financials is the backbone of your business and is vital to the long-term health and viability of your company. To continue applying the necessary financial rigor to support rapid growth, the accounting department needs the right tools to most efficiently do their job. Read this white paper to understand the 10 essentials of a complete financial management system and how the right solution can help you keep up with the rapidly changing business world.

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds