C# ConfigHelper 辅助类介绍
//==============================================
// 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;
}
}