winform Config文件操作

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Configuration;
using System.Reflection;

namespace ProcessErrorDataTools
{
public class ConfigManager
{
private static Configuration _configuration;
public static Configuration _Configuration
{
get
{
if (_configuration == null) _configuration = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
return _configuration;
}
set { _configuration = value; }
}

public ConfigManager()
{

}

/// <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(string key)
{
string value = string.Empty;
string filename = string.Empty;

//Configuration conf = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
XmlDocument doc = new XmlDocument();
filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + _Configuration.FilePath.Substring(_Configuration.FilePath.LastIndexOf("\") + 1);
doc.Load(filename);

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(string name)
{
string connectionString = string.Empty;
string filename = string.Empty;
//Configuration conf = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
XmlDocument doc = new XmlDocument();
filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + _Configuration.FilePath.Substring(_Configuration.FilePath.LastIndexOf("\") + 1);
doc.Load(filename);
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(string key, string value)
{
bool isSuccess = false;
string filename = string.Empty;
//Configuration conf = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
XmlDocument doc = new XmlDocument();
filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + _Configuration.FilePath.Substring(_Configuration.FilePath.LastIndexOf("\") + 1);
doc.Load(filename);

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(string name, string connectionString, string providerName)
{
bool isSuccess = false;
string filename = string.Empty;
//Configuration conf = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
XmlDocument doc = new XmlDocument();
filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + _Configuration.FilePath.Substring(_Configuration.FilePath.LastIndexOf("\") + 1);
doc.Load(filename);

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(string key)
{
bool isSuccess = false;
string filename = string.Empty;
//Configuration conf = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
XmlDocument doc = new XmlDocument();
filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + _Configuration.FilePath.Substring(_Configuration.FilePath.LastIndexOf("\") + 1);
doc.Load(filename);

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(string name)
{
bool isSuccess = false;
string filename = string.Empty;
//Configuration conf = ConfigurationManager.OpenExeConfiguration(Assembly.GetEntryAssembly().Location);
XmlDocument doc = new XmlDocument();
filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + _Configuration.FilePath.Substring(_Configuration.FilePath.LastIndexOf("\") + 1);
doc.Load(filename);

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;
}

}
}