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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: 复制代码 代码如下: <?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); |
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