//============================================== //        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。 //============================================== 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;     } }