VS2005中读写配置文件（方法一）（转载）

VS2003中对于应用程序配置文件（app.config或者web.config)只提供了读取的功能。而在VS2005中，对于配置文件的功能有了很大的加强。
在VS2005中，对于应用程序配置文件的读写一般使用Configuration,ConfigurationManager两个类。
ConfigurationManager类为客户应用程序提供了一个访问的功能。
使用ConfigurationManager对象执行打开配置文件的操作后，将会返回一个Configuration的对象。
通过程序实现读写配置文件的代码如下所示：
1     创建配置文件中的配置节所对应的类。该类必须继承自ConfigurationSection

public sealed class ConfigurationSections : ConfigurationSection
       ...{
           [ConfigurationProperty("filename", DefaultValue = "default.txt")]
           public string FileName
           ...{
               get
               ...{
                   return (string)this["filename"];
               }
               set
               ...{
                   this["filename"] = value;
               }
           }
       }
       public sealed class BusinessSpaceConfiguration : ConfigurationSection
       ...{
           [ConfigurationProperty("filename")]
           public string FileName
           ...{
               get
               ...{
                   return (string)this["filename"];
               }
               set
               ...{
                   this["filename"] = value;
               }
           }
       }

2     创建配置文件代码

private static void WriteAppConfiguration()
           ...{
               try
               ...{
                   ConfigurationSections configData = new ConfigurationSections();
                   configData.FileName = "abc.txt";
                   System.Configuration.Configuration     config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
                   config.Sections.Remove("ConfigurationSections");
                   config.Sections.Add("ConfigurationSections", configData);
                   config.Save();

                   BusinessSpaceConfiguration bsconfigData = new BusinessSpaceConfiguration();
                   bsconfigData.FileName = "def.txt";
                   System.Configuration.Configuration config1 = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
                   config1.Sections.Remove("BusinessSpaceConfiguration");
                   config1.Sections.Add("BusinessSpaceConfiguration", bsconfigData);
                   config1.Save();                      
               }
               catch (Exception err)
               ...{
                   Console.Write(err.Message);
               }
           }

3     生成的配置文件格式如下所示：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
       <configSections>
           <section name="BusinessSpaceConfiguration" type="ConsoleApplication1.BusinessSpaceConfiguration, ConsoleApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
           <section name="ConfigurationSections" type="ConsoleApplication1.ConfigurationSections, ConsoleApplication1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
       </configSections>
       <BusinessSpaceConfiguration filename="def.txt" />
       <ConfigurationSections filename="abc.txt" />
</configuration>

3     读取应用程序配置文件

private static void ReadAppConfiguration()
           ...{
               ConfigurationSections obj1 = ConfigurationManager.GetSection("ConfigurationSections") as ConfigurationSections;
               BusinessSpaceConfiguration obj2 = ConfigurationManager.GetSection("BusinessSpaceConfiguration") as BusinessSpaceConfiguration;
               Console.WriteLine(obj1.FileName);
               Console.WriteLine(obj2.FileName);

           }

本文转自
http://hi.baidu.com/geminiboy2008/blog/item/e59dee2a1f441899023bf647.html