应用程序配置文件,对于asp.net是 web.config,对于WINFORM程序是 App.Config(ExeName.exe.config)。
配置文件,对于程序本身来说,就是基础和依据,其本质是一个xml文件,对于配置文件的操作,从.NET 2.0 开始,就非常方便了,提供了 System [.Web] .Configuration 这个管理功能的NameSpace,要使用它,需要添加对 System.configuration.dll的引用。
对于WINFORM程序,使用 System.Configuration.ConfigurationManager;
对于ASP.NET 程序, 使用 System.Web.Configuration.WebConfigurationManager;
对于配置文件内容的读取,真是太普遍不过了,如果你的程序里,没有读取配置文件内容的方面,你都不好意思拿出来用
我们以最常见的 AppSettings 小节来作为例子:
假设有如下的配置文件内容:
<?xml version="1.0" encoding="utf-8" ?><configuration> <appSettings> <add key="y" value="this is Y"/> </appSettings></configuration>
1. 读取值:
- Asp.Net: System.Web.Configuration.WebConfigurationManager.AppSettings[“y”];
- WinForm: System.Configuration.ConfigurationManager.AppSettings[“y”];
2. 添加一项
- ASP.NET(需要有写权限):
Configuration config = WebConfigurationManager.OpenWebConfiguration(null);AppSettingsSection app = config.AppSettings;app.Settings.Add("x", "this is X");config.Save(ConfigurationSaveMode.Modified);
- WinForm:
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);AppSettingsSection app = config.AppSettings;app.Settings.Add("x", "this is X");config.Save(ConfigurationSaveMode.Modified);
3. 修改一项
- Asp.Net
Configuration config = WebConfigurationManager.OpenWebConfiguration(null);AppSettingsSection app = config.AppSettings;//app.Settings.Add("x", "this is X");app.Settings["x"].Value = "this is not Y";config.Save(ConfigurationSaveMode.Modified);
- WinForm
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);AppSettingsSection app = config.AppSettings;//app.Settings.Add("x", "this is X");app.Settings["x"].Value = "this is not Y";config.Save(ConfigurationSaveMode.Modified);
4. 删除一项
- Asp.Net
Configuration config = WebConfigurationManager.OpenWebConfiguration(null);AppSettingsSection app = config.AppSettings;app.Settings.Remove("x");config.Save(ConfigurationSaveMode.Modified);
- WinForm
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);AppSettingsSection app = config.AppSettings;app.Settings.Remove("x");config.Save(ConfigurationSaveMode.Modified);