C# ConfigurationManager.OpenMappedExeConfiguration方法代碼示例

// Access a configuration file using mapping.
   // This function uses the OpenMappedExeConfiguration 
   // method to access a new configuration file.   
   // It also gets the custom ConsoleSection and 
   // sets its ConsoleElement BackgroundColor and
   // ForegroundColor properties to green and red
   // respectively. Then it uses these properties to
   // set the console colors.  
   public static void MapExeConfiguration()
   {

     // Get the application configuration file.
     System.Configuration.Configuration config =
       ConfigurationManager.OpenExeConfiguration(
             ConfigurationUserLevel.None);
   
     Console.WriteLine(config.FilePath);

     if (config == null)
     {
       Console.WriteLine(
         "The configuration file does not exist.");
       Console.WriteLine(
        "Use OpenExeConfiguration to create the file.");
     }

     // Create a new configuration file by saving 
     // the application configuration to a new file.
     string appName = 
       Environment.GetCommandLineArgs()[0];

     string configFile =  string.Concat(appName, 
       ".2.config");
     config.SaveAs(configFile, ConfigurationSaveMode.Full);

     // Map the new configuration file.
     ExeConfigurationFileMap configFileMap = 
         new ExeConfigurationFileMap();
     configFileMap.ExeConfigFilename = configFile;

     // Get the mapped configuration file
    config = 
       ConfigurationManager.OpenMappedExeConfiguration(
         configFileMap, ConfigurationUserLevel.None);

     // Make changes to the new configuration file. 
     // This is to show that this file is the 
     // one that is used.
     string sectionName = "consoleSection";

     ConsoleSection customSection =
       (ConsoleSection)config.GetSection(sectionName);

     if (customSection == null)
     {
         customSection = new ConsoleSection();
         config.Sections.Add(sectionName, customSection);
     }
     else
         // Change the section configuration values.
         customSection =
             (ConsoleSection)config.GetSection(sectionName);

     customSection.ConsoleElement.BackgroundColor =
         ConsoleColor.Green;
     customSection.ConsoleElement.ForegroundColor =
         ConsoleColor.Red;

     // Save the configuration file.
     config.Save(ConfigurationSaveMode.Modified);

     // Force a reload of the changed section. This 
     // makes the new values available for reading.
     ConfigurationManager.RefreshSection(sectionName);

     // Set console properties using the 
     // configuration values contained in the 
     // new configuration file.
     Console.BackgroundColor =
       customSection.ConsoleElement.BackgroundColor;
     Console.ForegroundColor =
       customSection.ConsoleElement.ForegroundColor;
     Console.Clear();

     Console.WriteLine();
     Console.WriteLine("Using OpenMappedExeConfiguration.");
     Console.WriteLine("Configuration file is: {0}", 
       config.FilePath);
   }