C#读写config配置文件的方法

如下所示:

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

<appSettings>

<add key="ServerIP" value="127.0.0.1"></add>

<add key="DataBase" value="WarehouseDB"></add>

<add key="user" value="sa"></add>

<add key="password" value="sa"></add>

</appSettings>

</configuration>

对config配置文件的读写类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Text.RegularExpressions;

using System.Configuration;

using System.ServiceModel;

using System.ServiceModel.Configuration;

namespace NetUtilityLib

{

public static class ConfigHelper

{

//依据连接串名字connectionName返回数据连接字符串

public static string GetConnectionStringsConfig(string connectionName)

{

//指定config文件读取

string file = System.Windows.Forms.Application.ExecutablePath;

System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(file);

string connectionString =

config.ConnectionStrings.ConnectionStrings[connectionName].ConnectionString.ToString();

return connectionString;

}

///<summary>

///更新连接字符串

///</summary>

///<param name="newName">连接字符串名称</param>

///<param name="newConString">连接字符串内容</param>

///<param name="newProviderName">数据提供程序名称</param>

public static void UpdateConnectionStringsConfig(string newName, string newConString, string newProviderName)

{

//指定config文件读取

string file = System.Windows.Forms.Application.ExecutablePath;

Configuration config = ConfigurationManager.OpenExeConfiguration(file);

bool exist = false; //记录该连接串是否已经存在

//如果要更改的连接串已经存在

if (config.ConnectionStrings.ConnectionStrings[newName] != null)

{

exist = true;

}

// 如果连接串已存在,首先删除它

if (exist)

{

config.ConnectionStrings.ConnectionStrings.Remove(newName);

}

//新建一个连接字符串实例

ConnectionStringSettings mySettings =

new ConnectionStringSettings(newName, newConString, newProviderName);

// 将新的连接串添加到配置文件中.

config.ConnectionStrings.ConnectionStrings.Add(mySettings);

// 保存对配置文件所作的更改

config.Save(ConfigurationSaveMode.Modified);

// 强制重新载入配置文件的ConnectionStrings配置节

ConfigurationManager.RefreshSection("ConnectionStrings");

}

///<summary>

///返回*.exe.config文件中appSettings配置节的value项

///</summary>

///<param name="strKey"></param>

///<returns></returns>

public static string GetAppConfig(string strKey)

{

string file = System.Windows.Forms.Application.ExecutablePath;

Configuration config = ConfigurationManager.OpenExeConfiguration(file);

foreach (string key in config.AppSettings.Settings.AllKeys)

{

if (key == strKey)

{

return config.AppSettings.Settings[strKey].Value.ToString();

}

}

return null;

}

///<summary>

///在*.exe.config文件中appSettings配置节增加一对键值对

///</summary>

///<param name="newKey"></param>

///<param name="newValue"></param>

public static void UpdateAppConfig(string newKey, string newValue)

{

string file = System.Windows.Forms.Application.ExecutablePath;

Configuration config = ConfigurationManager.OpenExeConfiguration(file);

bool exist = false;

foreach (string key in config.AppSettings.Settings.AllKeys)

{

if (key == newKey)

{

exist = true;

}

}

if (exist)

{

config.AppSettings.Settings.Remove(newKey);

}

config.AppSettings.Settings.Add(newKey, newValue);

config.Save(ConfigurationSaveMode.Modified);

ConfigurationManager.RefreshSection("appSettings");

}

// 修改system.serviceModel下所有服务终结点的IP地址

public static void UpdateServiceModelConfig(string configPath, string serverIP)

{

Configuration config = ConfigurationManager.OpenExeConfiguration(configPath);

ConfigurationSectionGroup sec = config.SectionGroups["system.serviceModel"];

ServiceModelSectionGroup serviceModelSectionGroup = sec as ServiceModelSectionGroup;

ClientSection clientSection = serviceModelSectionGroup.Client;

foreach (ChannelEndpointElement item in clientSection.Endpoints)

{

string pattern = @"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b";

string address = item.Address.ToString();

string replacement = string.Format("{0}", serverIP);

address = Regex.Replace(address, pattern, replacement);

item.Address = new Uri(address);

}

config.Save(ConfigurationSaveMode.Modified);

ConfigurationManager.RefreshSection("system.serviceModel");

}

// 修改applicationSettings中App.Properties.Settings中服务的IP地址

public static void UpdateConfig(string configPath, string serverIP)

{

Configuration config = ConfigurationManager.OpenExeConfiguration(configPath);

ConfigurationSectionGroup sec = config.SectionGroups["applicationSettings"];

ConfigurationSection configSection = sec.Sections["DataService.Properties.Settings"];

ClientSettingsSection clientSettingsSection = configSection as ClientSettingsSection;

if (clientSettingsSection != null)

{

SettingElement element1 = clientSettingsSection.Settings.Get("DataService_SystemManagerWS_SystemManagerWS");

if (element1 != null)

{

clientSettingsSection.Settings.Remove(element1);

string oldValue = element1.Value.ValueXml.InnerXml;

element1.Value.ValueXml.InnerXml = GetNewIP(oldValue, serverIP);

clientSettingsSection.Settings.Add(element1);

}

SettingElement element2 = clientSettingsSection.Settings.Get("DataService_EquipManagerWS_EquipManagerWS");

if (element2 != null)

{

clientSettingsSection.Settings.Remove(element2);

string oldValue = element2.Value.ValueXml.InnerXml;

element2.Value.ValueXml.InnerXml = GetNewIP(oldValue, serverIP);

clientSettingsSection.Settings.Add(element2);

}

}

config.Save(ConfigurationSaveMode.Modified);

ConfigurationManager.RefreshSection("applicationSettings");

}

private static string GetNewIP(string oldValue, string serverIP)

{

string pattern = @"\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b";

string replacement = string.Format("{0}", serverIP);

string newvalue = Regex.Replace(oldValue, pattern, replacement);

return newvalue;

}

}

}

测试代码如下:

class Program

{

static void Main(string[] args)

{

try

{

//string file = System.Windows.Forms.Application.ExecutablePath + ".config";

//string file1 = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;

string serverIP = ConfigHelper.GetAppConfig("ServerIP");

string db = ConfigHelper.GetAppConfig("DataBase");

string user = ConfigHelper.GetAppConfig("user");

string password = ConfigHelper.GetAppConfig("password");

Console.WriteLine(serverIP);

Console.WriteLine(db);

Console.WriteLine(user);

Console.WriteLine(password);

ConfigHelper.UpdateAppConfig("ServerIP", "192.168.1.11");

string newIP = ConfigHelper.GetAppConfig("ServerIP");

Console.WriteLine(newIP);

Console.ReadKey();

}

catch (Exception ex)

{

Console.WriteLine(ex.Message);

}

}

}

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