Net操作配置文件（Web.config|App.config）通用类

一、Net操作web.config通用类（代码如下）：

using System;
using System.Configuration;
using System.Web;
using System.Web.Configuration;
/// ConfigurationOperator 的摘要说明
public class ConfigurationOperator : IDisposable
{
private Configuration config;
public ConfigurationOperator()
: this(HttpContext.Current.Request.ApplicationPath) { }
public ConfigurationOperator(string path)
{
config = WebConfigurationManager.OpenWebConfiguration(path);
}
/// 设置应用程序配置节点,如果已经存在此节点,则会修改该节点的值,否则添加此节点
///
/// 节点名称 
/// 节点值 
public void SetAppSetting(string key, string value)
{
AppSettingsSection appSetting = (AppSettingsSection)config.GetSection("appSettings");
if (appSetting.Settings[key] == null)//如果不存在此节点,则添加
        {
appSetting.Settings.Add(key, value);
}
else//如果存在此节点,则修改
        {
appSetting.Settings[key].Value = value;
}
}
///
/// 设置数据库连接字符串节点,如果不存在此节点,则会添加此节点及对应的值,存在则修改
///
/// 节点名称 
/// 节点值 
public void SetConnectionString(string key, string connectionString)
{
ConnectionStringsSection connectionSetting = (ConnectionStringsSection)config.GetSection("connectionStrings");
if (connectionSetting.ConnectionStrings[key] == null)//如果不存在此节点,则添加
        {
ConnectionStringSettings connectionStringSettings = new ConnectionStringSettings(key, connectionString);
connectionSetting.ConnectionStrings.Add(connectionStringSettings);
}
else//如果存在此节点,则修改
        {
connectionSetting.ConnectionStrings[key].ConnectionString = connectionString;
}
}
///
/// 保存所作的修改
public void Save()
{
config.Save();
config = null;
}
public void Dispose()
{
if (config != null)
{
config.Save();
}
}
}

二、调用方法：

// 连接字符串
string connectionString = string.Format("Data Source={0};Initial Catalog={1};User ID={2};Password={3}; max pool size=150",
tbx_ip.Text.Trim(), tbx_dbname.Text.Trim(), tbx_username.Text.Trim(), tbx_pwd.Text.Trim());
ConfigurationOperator config = new ConfigurationOperator();
config.SetConnectionString("defaultConnection", connectionString);
config.Save();