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最近我做的一些项目,经常需要用到对应用程序的配置文件操作,如app.config和web.config的配置文件,特别是对配置文件中的[appSettings]和[connectionStrings]两个节点常常进行新增、修改、删除和读取相关的操作的,所以,我自己就亲手把这些相关的操作都封装到一个配置文件管理器中,用静态的方法来调用便可,以下是我的实现,以资参考. ps:后来我依据这个随笔中操作配置文档节点的方法扩展了其功能,使之能够针对所有的XML文档进行相关的节点或属性的读取,添加,修改,更新操作, 详情请参考我的另一篇随笔:这是一个关于XML文档的操作管理器XMLHelper类,类中包括XML文档的创建,文档节点和属性的读取,添加,修改,删除的方法功能的实现
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// // Copyright(C) 2009-2010 连林SoftWare工作室 // All Rights Reserved // // FileName: ConfigManager // Description: 静态方法业务类,用于对C#、ASP.NET中的WinForm & WebForm 项目程序配置文件 // app.config和web.config的[appSettings]和[connectionStrings]节点进行新增、修改、删除和读取相关的操作。 // // Author: Wang Lian Lin(王连林) // CLR版本: 2.0.50727.42 // MachineName: WLL // 注册组织名: WLL // Created By Wang Lian Lin(王连林) at 2009-3-9 22:04:45 // Email: [email protected] // http://chnboy.cnblogs.com // //============================================== using System; using System.Data; using System.Configuration; using System.Web; using System.Collections.Generic; using System.Text; using System.Xml; public enum ConfigurationFile { AppConfig=1, WebConfig=2 } /// <summary> /// ConfigManager 应用程序配置文件管理器 /// </summary> public class ConfigManager { public ConfigManager() { // // TODO: 在此处添加构造函数逻辑 // } /// <summary> /// 对[appSettings]节点依据Key值读取到Value值,返回字符串 /// </summary> /// <param name="configurationFile">要操作的配置文件名称,枚举常量</param> /// <param name="key">要读取的Key值</param> /// <returns>返回Value值的字符串</returns> public static string ReadValueByKey(ConfigurationFile configurationFile, string key) { string value = string.Empty; string filename = string.Empty; if (configurationFile.ToString()==ConfigurationFile.AppConfig.ToString()) { filename = System.Windows.Forms.Application.ExecutablePath + ".config"; } else { filename = System.AppDomain.CurrentDomain.BaseDirectory + "web.config"; } XmlDocument doc = new XmlDocument(); doc.Load(filename); //加载配置文件 XmlNode node = doc.SelectSingleNode("//appSettings"); //得到[appSettings]节点 ////得到[appSettings]节点中关于Key的子节点 XmlElement element = (XmlElement)node.SelectSingleNode("//add[@key='" + key + "']"); if (element != null) { value = element.GetAttribute("value"); } return value; } /// <summary> /// 对[connectionStrings]节点依据name值读取到connectionString值,返回字符串 /// </summary> /// <param name="configurationFile">要操作的配置文件名称,枚举常量</param> /// <param name="name">要读取的name值</param> /// <returns>返回connectionString值的字符串</returns> public static string ReadConnectionStringByName(ConfigurationFile configurationFile, string name) { string connectionString = string.Empty; string filename = string.Empty; if (configurationFile.ToString() == ConfigurationFile.AppConfig.ToString()) { filename = System.Windows.Forms.Application.ExecutablePath + ".config"; } else { filename = System.AppDomain.CurrentDomain.BaseDirectory + "web.config"; } XmlDocument doc = new XmlDocument(); doc.Load(filename); //加载配置文件 XmlNode node = doc.SelectSingleNode("//connectionStrings"); //得到[appSettings]节点 ////得到[connectionString]节点中关于name的子节点 XmlElement element = (XmlElement)node.SelectSingleNode("//add[@name='" + name + "']"); if (element != null) { connectionString = element.GetAttribute("connectionString"); } return connectionString; } /// <summary> /// 更新或新增[appSettings]节点的子节点值,存在则更新子节点Value,不存在则新增子节点,返回成功与否布尔值 /// </summary> /// <param name="configurationFile">要操作的配置文件名称,枚举常量</param> /// <param name="key">子节点Key值</param> /// <param name="value">子节点value值</param> /// <returns>返回成功与否布尔值</returns> public static bool UpdateOrCreateAppSetting(ConfigurationFile configurationFile, string key, string value) { bool isSuccess = false; string filename = string.Empty; if (configurationFile.ToString() == ConfigurationFile.AppConfig.ToString()) { filename = System.Windows.Forms.Application.ExecutablePath + ".config"; } else { filename = System.AppDomain.CurrentDomain.BaseDirectory + "web.config"; } XmlDocument doc = new XmlDocument(); doc.Load(filename); //加载配置文件 XmlNode node = doc.SelectSingleNode("//appSettings"); //得到[appSettings]节点 try { ////得到[appSettings]节点中关于Key的子节点 XmlElement element = (XmlElement)node.SelectSingleNode("//add[@key='" + key + "']"); if (element != null) { //存在则更新子节点Value element.SetAttribute("value", value); } else { //不存在则新增子节点 XmlElement subElement = doc.CreateElement("add"); subElement.SetAttribute("key", key); subElement.SetAttribute("value", value); node.AppendChild(subElement); } //保存至配置文件(方式一) using (XmlTextWriter xmlwriter = new XmlTextWriter(filename, null)) { xmlwriter.Formatting = Formatting.Indented; doc.WriteTo(xmlwriter); xmlwriter.Flush(); } isSuccess = true; } catch (Exception ex) { isSuccess = false; throw ex; } return isSuccess; } /// <summary> /// 更新或新增[connectionStrings]节点的子节点值,存在则更新子节点,不存在则新增子节点,返回成功与否布尔值 /// </summary> /// <param name="configurationFile">要操作的配置文件名称,枚举常量</param> /// <param name="name">子节点name值</param> /// <param name="connectionString">子节点connectionString值</param> /// <param name="providerName">子节点providerName值</param> /// <returns>返回成功与否布尔值</returns> public static bool UpdateOrCreateConnectionString(ConfigurationFile configurationFile, string name, string connectionString, string providerName) { bool isSuccess = false; string filename = string.Empty; if (configurationFile.ToString() == ConfigurationFile.AppConfig.ToString()) { filename = System.Windows.Forms.Application.ExecutablePath + ".config"; } else { filename = System.AppDomain.CurrentDomain.BaseDirectory + "web.config"; } XmlDocument doc = new XmlDocument(); doc.Load(filename); //加载配置文件 XmlNode node = doc.SelectSingleNode("//connectionStrings"); //得到[connectionStrings]节点 try { ////得到[connectionStrings]节点中关于Name的子节点 XmlElement element = (XmlElement)node.SelectSingleNode("//add[@name='" + name + "']"); if (element != null) { //存在则更新子节点 element.SetAttribute("connectionString", connectionString); element.SetAttribute("providerName", providerName); } else { //不存在则新增子节点 XmlElement subElement = doc.CreateElement("add"); subElement.SetAttribute("name", name); subElement.SetAttribute("connectionString", connectionString); subElement.SetAttribute("providerName", providerName); node.AppendChild(subElement); } //保存至配置文件(方式二) doc.Save(filename); isSuccess = true; } catch (Exception ex) { isSuccess = false; throw ex; } return isSuccess; } /// <summary> /// 删除[appSettings]节点中包含Key值的子节点,返回成功与否布尔值 /// </summary> /// <param name="configurationFile">要操作的配置文件名称,枚举常量</param> /// <param name="key">要删除的子节点Key值</param> /// <returns>返回成功与否布尔值</returns> public static bool DeleteByKey(ConfigurationFile configurationFile, string key) { bool isSuccess = false; string filename = string.Empty; if (configurationFile.ToString() == ConfigurationFile.AppConfig.ToString()) { filename = System.Windows.Forms.Application.ExecutablePath + ".config"; } else { filename = System.AppDomain.CurrentDomain.BaseDirectory + "web.config"; } XmlDocument doc = new XmlDocument(); doc.Load(filename); //加载配置文件 XmlNode node = doc.SelectSingleNode("//appSettings"); //得到[appSettings]节点 ////得到[appSettings]节点中关于Key的子节点 XmlElement element = (XmlElement)node.SelectSingleNode("//add[@key='" + key + "']"); if (element != null) { //存在则删除子节点 element.ParentNode.RemoveChild(element); } else { //不存在 } try { //保存至配置文件(方式一) using (XmlTextWriter xmlwriter = new XmlTextWriter(filename, null)) { xmlwriter.Formatting = Formatting.Indented; doc.WriteTo(xmlwriter); xmlwriter.Flush(); } isSuccess = true; } catch (Exception ex) { isSuccess = false; } return isSuccess; } /// <summary> /// 删除[connectionStrings]节点中包含name值的子节点,返回成功与否布尔值 /// </summary> /// <param name="configurationFile">要操作的配置文件名称,枚举常量</param> /// <param name="name">要删除的子节点name值</param> /// <returns>返回成功与否布尔值</returns> public static bool DeleteByName(ConfigurationFile configurationFile, string name) { bool isSuccess = false; string filename = string.Empty; if (configurationFile.ToString() == ConfigurationFile.AppConfig.ToString()) { filename = System.Windows.Forms.Application.ExecutablePath + ".config"; } else { filename = System.AppDomain.CurrentDomain.BaseDirectory + "web.config"; } XmlDocument doc = new XmlDocument(); doc.Load(filename); //加载配置文件 XmlNode node = doc.SelectSingleNode("//connectionStrings"); //得到[connectionStrings]节点 ////得到[connectionStrings]节点中关于Name的子节点 XmlElement element = (XmlElement)node.SelectSingleNode("//add[@name='" + name + "']"); if (element != null) { //存在则删除子节点 node.RemoveChild(element); } else { //不存在 } try { //保存至配置文件(方式二) doc.Save(filename); isSuccess = true; } catch (Exception ex) { isSuccess = false; } return isSuccess; } } |
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