C#对App.config文件或者web.config文件中节点的操作类

//==============================================

//        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;

using TempusMq;

namespace Kevin.DAL

{

   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 e)

           {

               isSuccess = false;

               //输出的调试字符串

               string strOuput = string.Format("更新或新增[appSettings]节点的子节点值失败:{0}\n", e.Message);

               //将信息写入到日志输出文件

               DllComm.TP_WriteAppLogFileEx(DllComm.g_AppLogFileName, strOuput);

           }

           return isSuccess;

       }

       /// <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 configFileName,string key, string value)

           {

               bool isSuccess = false;

               string filename = configFileName;

               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 e)

                {

                isSuccess = false;

                //输出的调试字符串

                string strOuput = string.Format("更新或新增[appSettings]节点的子节点值失败:{0}\n", e.Message);

                //将信息写入到日志输出文件

                DllComm.TP_WriteAppLogFileEx(DllComm.g_AppLogFileName, strOuput);

                }

               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 e)

           {

               isSuccess = false;

               //输出的调试字符串

               string strOuput = string.Format("更新或新增[connectionStrings]节点的子节点值:{0}失败:{1}\n",name,e.Message);

               //将信息写入到日志输出文件

               DllComm.TP_WriteAppLogFileEx(DllComm.g_AppLogFileName, strOuput);

           }

           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 e)

           {

               //输出的调试字符串

               string strOuput = string.Format("删除[appSettings]节点中包含Key:{0}值的子节点失败:{1}\n",key, e.Message);

               //将信息写入到日志输出文件

               DllComm.TP_WriteAppLogFileEx(DllComm.g_AppLogFileName, strOuput);

           }

           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 e)

           {

               isSuccess = false;

               //输出的调试字符串

               string strOuput = string.Format("删除[connectionStrings]节点中包含name:{0}值的子节点失败:{1}\n",name,e.Message);

               //将信息写入到日志输出文件

               DllComm.TP_WriteAppLogFileEx(DllComm.g_AppLogFileName, strOuput);

           }

           return isSuccess;

       }

   }

}