C#读写Config配置文件案例 C#读写Config配置文件案例

一、简介应用程序配置文件（App.config）是标准的 XML 文件，XML 标记和属性是区分大小写的。它是可以按需要更改的，开发人员可以使用配置文件来更改设置，而不必重编译应用程序。
*.exe.config配置文件样式：

二、代码 1.配置文件读写类

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Text.RegularExpressions; using System.Configuration; using System.ServiceModel; using System.ServiceModel.Configuration; namespace XMLDemo1{public static class ConfigHelper{#region ConnectionStrings//依据连接串名字connectionName返回数据连接字符串public static string GetConnectionStringsConfig(string connectionName){//指定config文件读取string file = System.Windows.Forms.Application.ExecutablePath; System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(file); string connectionString =config.ConnectionStrings.ConnectionStrings[connectionName].ConnectionString.ToString(); return connectionString; }/// ///更新连接字符串/// ///连接字符串名称 ///连接字符串内容 ///【C#读写Config配置文件案例】数据提供程序名称 public static void UpdateConnectionStringsConfig(string newName, string newConString, string newProviderName){//指定config文件读取string file = System.Windows.Forms.Application.ExecutablePath; Configuration config = ConfigurationManager.OpenExeConfiguration(file); bool exist = false; //记录该连接串是否已经存在//如果要更改的连接串已经存在if (config.ConnectionStrings.ConnectionStrings[newName] != null){exist = true; }// 如果连接串已存在，首先删除它if (exist){config.ConnectionStrings.ConnectionStrings.Remove(newName); }//新建一个连接字符串实例ConnectionStringSettings mySettings =new ConnectionStringSettings(newName, newConString, newProviderName); // 将新的连接串添加到配置文件中.config.ConnectionStrings.ConnectionStrings.Add(mySettings); // 保存对配置文件所作的更改config.Save(ConfigurationSaveMode.Modified); // 强制重新载入配置文件的ConnectionStrings配置节ConfigurationManager.RefreshSection("ConnectionStrings"); }#endregion#region appSettings/// ///返回*.exe.config文件中appSettings配置节的value项/// /// /// public static string GetAppConfig(string strKey){//D:\Winform\xml文档操作\XMLDemo1\bin\Debug\XMLDemo1.EXEstring file = System.Windows.Forms.Application.ExecutablePath; Configuration config = ConfigurationManager.OpenExeConfiguration(file); foreach (string key in config.AppSettings.Settings.AllKeys){if (key == strKey){return config.AppSettings.Settings[strKey].Value.ToString(); }}return null; }//////在*.exe.config文件中appSettings配置节增加一对键值对/////////public static void UpdateAppConfig(string newKey, string newValue){string file = System.Windows.Forms.Application.ExecutablePath; Configuration config = ConfigurationManager.OpenExeConfiguration(file); bool exist = false; foreach (string key in config.AppSettings.Settings.AllKeys){if (key == newKey){exist = true; }}if (exist){config.AppSettings.Settings.Remove(newKey); }config.AppSettings.Settings.Add(newKey, newValue); config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection("appSettings"); }#endregion#region// 修改system.serviceModel下所有服务终结点的IP地址public static void UpdateServiceModelConfig(string configPath, string serverIP){Configuration config = ConfigurationManager.OpenExeConfiguration(configPath); ConfigurationSectionGroup sec = config.SectionGroups["system.serviceModel"]; ServiceModelSectionGroup serviceModelSectionGroup = sec as ServiceModelSectionGroup; ClientSection clientSection = serviceModelSectionGroup.Client; foreach (ChannelEndpointElement item in clientSection.Endpoints){string pattern = @"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b"; string address = item.Address.ToString(); string replacement = string.Format("{0}", serverIP); address = Regex.Replace(address, pattern, replacement); item.Address = new Uri(address); }config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection("system.serviceModel"); }// 修改applicationSettings中App.Properties.Settings中服务的IP地址public static void UpdateConfig(string configPath, string serverIP){Configuration config = ConfigurationManager.OpenExeConfiguration(configPath); ConfigurationSectionGroup sec = config.SectionGroups["applicationSettings"]; ConfigurationSection configSection = sec.Sections["DataService.Properties.Settings"]; ClientSettingsSection clientSettingsSection = configSection as ClientSettingsSection; if (clientSettingsSection != null){SettingElement element1 = clientSettingsSection.Settings.Get("DataService_SystemManagerWS_SystemManagerWS"); if (element1 != null){clientSettingsSection.Settings.Remove(element1); string oldValue = https://www.it610.com/article/element1.Value.ValueXml.InnerXml; element1.Value.ValueXml.InnerXml = GetNewIP(oldValue, serverIP); clientSettingsSection.Settings.Add(element1); }SettingElement element2 = clientSettingsSection.Settings.Get("DataService_EquipManagerWS_EquipManagerWS"); if (element2 != null){clientSettingsSection.Settings.Remove(element2); string oldValue = https://www.it610.com/article/element2.Value.ValueXml.InnerXml; element2.Value.ValueXml.InnerXml = GetNewIP(oldValue, serverIP); clientSettingsSection.Settings.Add(element2); }}config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection("applicationSettings"); }private static string GetNewIP(string oldValue, string serverIP){string pattern = @"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b"; string replacement = string.Format("{0}", serverIP); string newvalue = https://www.it610.com/article/Regex.Replace(oldValue, pattern, replacement); return newvalue; }#endregion}}

2.Main 函数

namespace XMLDemo1{class Program{static void Main(string[] args){try{//D:\Winform\xml文档操作\XMLDemo1\bin\Debug\XMLDemo1.EXE//string file0 = System.Windows.Forms.Application.ExecutablePath; //D:\Winform\xml文档操作\XMLDemo1\bin\Debug\XMLDemo1.EXE.config//string file = System.Windows.Forms.Application.ExecutablePath + ".config"; //D:\Winform\xml文档操作\XMLDemo1\bin\Debug\XMLDemo1.vshost.exe.Config//string file1 = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile; string serverIP = ConfigHelper.GetAppConfig("ServerIP"); string db = ConfigHelper.GetAppConfig("DataBase"); string user = ConfigHelper.GetAppConfig("user"); string password = ConfigHelper.GetAppConfig("password"); Console.WriteLine(serverIP); Console.WriteLine(db); Console.WriteLine(user); Console.WriteLine(password); ConfigHelper.UpdateAppConfig("ServerIP", "192.168.0.1"); string newIP = ConfigHelper.GetAppConfig("ServerIP"); Console.WriteLine(newIP); ConfigHelper.UpdateConnectionStringsConfig("connstr4", ".......", "System.Data.Sqlclient"); Console.ReadKey(); }catch (Exception ex){Console.WriteLine(ex.Message); }}}}

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