c#读取Config文件的问题

应用程序配置文件（App.config）是标准的 XML 文件，XML 标记和属性是区分大小写的。它是可以按需要更改的，开发人员可以使用配置文件来更改设置，而不必重编译应用程序。

对于一个config文件：

<?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)

}

}

}

make.config文件里的配置通常由系统管理员或开发者使用，以确定系统运行时的一些配置参数，如编译参数、网络参数等。make.config文件的内容主要由定义一些系统变量组成，这些变量可以指定系统的某些参数，比如 *** 作系统的名称、版本、架构等，也可以指定一些编译参数，如C语言编译器的名称和版本、编译选项等，还可以指定一些网络参数，如网络接口的IP地址、子网掩码等，这些参数将由系统自动读取，以确保系统运行时正确地按照配置参数运行。

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