C#如何读取config配置文件数据?
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不用扯太多!就简单一句话,怎么读配置文件数据?
比如就一条数据<add key=hotelname value=深圳酒店>
怎么把它读出来?然后显示在listbox中。
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\\d1,3\\.\\d1,3\\.\\d1,3\\.\\d1,3\\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\\d1,3\\.\\d1,3\\.\\d1,3\\.\\d1,3\\b";
string replacement = string.Format("0", serverIP);
string newvalue = Regex.Replace(oldValue, pattern, replacement);
return newvalue;
参考技术A String hotelname = ConfigurationManager.AppSettings["hotelname"];
需要在资源管理器的引用里面,添加System.Configuration,然后再在代码中添加 using System.Configuration;
才能使用。
.net 3.0以后,均需要引用 System.Configuration 才能访问配置文件。追问
谢谢!但没看懂。我是第一次接触那玩意
追答这个已经是最简单的了。
第一步,在右侧的资源管理器里,引用,添加引用,选择.net中的System.Configuration
第二步,在代码最前面,添加using System.Configuration;
第三步,在你想读取配置文件的地方,使用
String hotelname = ConfigurationManager.AppSettings["hotelname"];
变量hotelname读取的就是配置文件中你添加的值了。
这个代码我会玩。
也怪我没说清楚。想用Xmltextread的方法读取。
在代码第一行,加入using System.Xml;
XmlDocument xml = new XmlDocument();
string appPath = AppDomain.CurrentDomain.BaseDirectory;
xml.Load(appPath + "\\xxx.xml"); //XML地址
XmlElement xnode = (XmlElement)xml.SelectSingleNode("/configuration/add[@name='hotelname']");
String hotelname = xnode.GetAttribute("value");
<add name="OracleConnStr" connectionString="Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.1.111)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=BBS)));User ID=system;Password=123;" providerName="System.Data.OracleClient"/>
获取:
string connectionString = ConfigurationManager.ConnectionStrings["OracleConnStr"].ToString();
你看着办吧追问
谢谢!但没看懂。我是第一次接触那玩意
参考技术C 不给分还这么硬气,哎,自己去搜吧C# 对 App.config的appSettings节点数据进行加密
<EncryptedData> <CipherData> <CipherValue>AQAAANCMnd8BFdERjHoAwE/Cl+sBAAAABbLHX[...]</CipherValue> </CipherData> </EncryptedData>
加密方法
方法一(利用代码实现)
/// <summary> /// 对appSettings节点添加健值 /// 如果健已经存在则更改值 /// 添加后重新保存并刷新该节点 /// </summary> /// <param name="dict">添加的健值集合</param> /// <param name="isProtected">是否加密appSettings节点数据,如果为TrueappSettings节点下所有数据都会被加密</param> public static void AddConfig(System.Collections.Generic.Dictionary<string, string> dict, bool isProtected) { if (dict == null || dict.Count <= 0) return; System.Configuration.Configuration configuration =System.Configuration.ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); //循环添加或更改健值 foreach (System.Collections.Generic.KeyValuePair<string, string> key_value in dict) { if (string.IsNullOrEmpty(key_value.Key)) continue; if ( configuration.AppSettings.Settings[key_value.Key]!=null) configuration.AppSettings.Settings[key_value.Key].Value = key_value.Value; else configuration.AppSettings.Settings.Add(key_value.Key, key_value.Value); } //保存配置文件 try { //加密配置信息 if (isProtected && !configuration.AppSettings.SectionInformation.IsProtected) { configuration.AppSettings.SectionInformation.ForceSave = true; configuration.AppSettings.SectionInformation.ProtectSection("DataProtectionConfigurationProvider"); } configuration.Save(); } catch (Exception) { throw; } ConfigurationManager.RefreshSection("appSettings"); } }
方法二
利用现成的工具ASP.NET IIS 注册工具 (Aspnet_regiis.exe),可是它只能针对ASP.NET的Web.config文件,难道我们就没有办法了吗?答案当然是否定的。
配置选项
-pdf section webApplicationDirectory | 对指定物理(非虚拟)目录中的 Web.config 文件的指定配置节进行解密。 |
-pef section webApplicationDirectory | 对指定物理(非虚拟)目录中的 Web.config 文件的指定配置节进行加密。 |
-pdf 和-pef 参数是对指定的物理目录里的Web.config文件进行加密,我们可以先将App.config文件改名为Web.config,通过这两个参数便可以“骗”过系统,让它将指定的配置节进行加密,我们只需要将加密后的文件名改回App.config即可,我们来实验一下:
第一步:先将目录下的App.config改名为Web.config。
第二步:打开SDK命令提示,输入命令:aspnet_regiis -pef "配置节" "目录",以我的项目为例,加密前的config文件内容如下:
<?xml version="1.0" encoding="utf-8"?> <configuration> <configSections> <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" /> </configSections> <dataConfiguration defaultDatabase="Connection String" /> <connectionStrings> <add name="Connection String" connectionString="Database=LocomotiveStat;Server=10.167.61.49;User ID=sa;Password=sa;" providerName="System.Data.SqlClient" /> </connectionStrings> </configuration>
输入命令:aspnet_regiis -pef "connectionStrings" "E:\开发目录",加密后的config文件内容如下:
<?xml version="1.0" encoding="utf-8"?> <configuration> <configSections> <section name="dataConfiguration" type="Microsoft.Practices.EnterpriseLibrary.Data.Configuration.DatabaseSettings, Microsoft.Practices.EnterpriseLibrary.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null" /> </configSections> <dataConfiguration defaultDatabase="Connection String" /> <connectionStrings configProtectionProvider="RsaProtectedConfigurationProvider"> <EncryptedData Type="http://www.w3.org/2001/04/xmlenc#Element" xmlns="http://www.w3.org/2001/04/xmlenc#"> <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#tripledes-cbc" /> <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#"> <EncryptedKey xmlns="http://www.w3.org/2001/04/xmlenc#"> <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5" /> <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#"> <KeyName>Rsa Key</KeyName> </KeyInfo> <CipherData> <CipherValue>g2QFQqbHU1L6WUPYqjADqFAvHcdq/7dqCd1U9GlQFEi/nHDVHjqsWvjNywOZtQQg7Q/yW7g8xlRCo0h2+yYd/tQTNoVMu/RKdJmSjZMnmnwpWq+S2VEWK4U106JQwLCfBR/bAF4DHvG47B9KB0JbRfXBt5V2wJVaAI9u3kzuj50=</CipherValue> </CipherData> </EncryptedKey> </KeyInfo> <CipherData> <CipherValue>blwV/ZW1izFZL80YL5RkcjrIjWkQ0L1gJhgZbxEzzTgOcT24ihrAnv3/rDCG+WIZ7TL5D/rMm7dQwkIsij1Sh3befg6F3+pxcW4oe1w/bovIKuzjs3tokUpBvTTj+fsCs2W/MWUhQaWMKQWkHfS2Ajt6gL6MTYtb3pfQUp0pdHbeRxoqdiAksQ1Zzsi1FtRTi7gTT7hnpF0pJs+W9mxTVDMO/qSZXfXLOEMIs/A5ExcfvR5GjpaPuDeLuSsCN3XtjaiXzaDQ3It7j+r66+L2C0xvEhbT9SsG</CipherValue> </CipherData> </EncryptedData> </connectionStrings> </configuration>
由此可见,我们已经完成了任务,现在只需要将Web.config文件名改回App.config即可,在应用程序项目中无需对该文件进行解密操作,.NET框架会自动替我们完成,如果想解密该文件也很简单,在SDK命令提示里输入aspnet_regiis -pdf "配置节" "目录"即可。
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