C#操作配置文件增删改
springsnow 人气:0一、概述
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 这个管理功能的命名空间,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;
二、配置文件
<?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <add key="y" value="this is Y"/> </appSettings> </configuration>
三、读取配置文件:
1. 读取值:
System.Configuration.ConfigurationManager.AppSettings[“y”];
Asp.Net程序:
System.Web.Configuration.WebConfigurationManager.AppSettings[“y”];
读取最新值:
Configuration config = ConfigurationManager.OpenExeConfiguration(null); AppSettingsSection app = config.AppSettings; // 或者AppSettingsSection app =config.GetSection("AppSettings") as AppSettingsSection
Asp.Net程序读取值:
Configuration config = WebConfigurationManager.OpenWebConfiguration(null); AppSettingsSection app = config.AppSettings; // 或者AppSettingsSection app =config.GetSection("AppSettings") as AppSettingsSection;
2、查看值
string y=app.Settings["y"].Value; foreach (string key in app.Settings) { Console.WriteLine(key+","+ app.Settings[key].Value); }
3、添加一项
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); AppSettingsSection app = config.AppSettings; app.Settings.Add("x", "this is X"); config.Save(ConfigurationSaveMode.Modified);
4、修改一项
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);
5、删除一项
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); AppSettingsSection app = config.AppSettings; app.Settings.Remove("x"); config.Save(ConfigurationSaveMode.Modified);
说明:需要注意的是,代码所修改的并不是app.config,而是[Application_Name].exe.config这个文件。
其中Application_Name就是你的可执行文件的文件名,而[Application_Name].exe.config才是真正起作用的配置文件。
至于app.config,把它理解为是初始化配置文件比较合适。
四、连接字符串
1、读取连接字符串
ConnectionStringSettings conn=ConfigurationManager.ConnectionStrings["y"];
或者
Configuration config = ConfigurationManager.OpenExeConfiguration(null); ConnectionStringsSection connSeciton = config.ConnectionStrings; connSeciton.ConnectionStrings.Add(new ConnectionStringSettings("name", "connectionstring", "provider"));
2、加密字符串
public static void EncryptConnectionString(bool encrypt) { Configuration configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); ConnectionStringsSection configSection = configFile.GetSection("connectionStrings") as ConnectionStringsSection; if ((!(configSection.ElementInformation.IsLocked)) && (!(configSection.SectionInformation.IsLocked))) { if (encrypt && !configSection.SectionInformation.IsProtected) //encrypt is false to unencrypt { configSection.SectionInformation.ProtectSection("DataProtectionConfigurationProvider"); } if (!encrypt && configSection.SectionInformation.IsProtected) { configSection.SectionInformation.UnprotectSection(); //encrypt is true so encrypt } configSection.SectionInformation.ForceSave = true; //re-save the configuration file section configFile.Save(); // Save the current configuration. } }
到此这篇关于C#操作配置文件app.config、web.config增删改的文章就介绍到这了。希望对大家的学习有所帮助,也希望大家多多支持。
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