在Winform中动态读写app.config文件
1、 首先需要在项目中引用：System.Configuration
2、 通过OpenExeConfiguration（）这个方法来对配置文件进行操作
若当前项目的配置文件如下：
需要对上面appSettings的键值作修改，如下代码所示：
string path = Application.StartupPath + "\\ASSEMLY.exe";
Configuration config = ConfigurationManager.OpenExeConfiguration(path);
config.AppSettings.Settings.Clear();
config.AppSettings.Settings.Add("DataSource", this.DataSource);
config.AppSettings.Settings.Add("InitialCatalog", this.InitialCatalog);
config.AppSettings.Settings.Add("UserId", this.UserId);
config.AppSettings.Settings.Add("Password", this.DePassword);
config.AppSettings.Settings.Add("ConnectTimeout", this.ConnectTimeout.ToString());
// 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("appSettings");
其中它是不能直接修改健值的，是在修改之前要删除该键值，然后重新添加
同是，上面的只是对AppSettings进行操作，其实也可以对ConnectionStrings、SectionGroups、Sections进行操作
读取所有的AppSettings的值
StringBuilder str = new StringBuilder();
str.Append("
| 用户名 | webservices地址 | webservices方法名称 | |
|---|---|---|---|
 | " + key.Replace("WebSiteUser", "") + " | " + webservices + " | " + method + " |
ViewData["ListWebSiteUser"] = str;
return View();
Winform—C#读写config配置文件
现在FrameWork2.0以上使用的是：ConfigurationManager或WebConfigurationManager。并且AppSettings属性是只读的，并不支持修改属性值．
一、如何使用ConfigurationManager？
1、添加引用：添加System.configguration
2、引用空间
3、config配置文件配置节
常用配置节：
（1）普通配置节
（2）数据源配置节
（3）自定义配置节
二、config文件读写
1、依据连接串名字connectionName返回数据连接字符串
//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;
}
2、更新连接字符串
//////更新连接字符串 /// ///连接字符串名称 ///连接字符串内容 ///数据提供程序名称 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"); }
3、返回*.exe.config文件中appSettings配置节的value项
//////返回*.exe.config文件中appSettings配置节的value项 /// /// ///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; }
4、在*.exe.config文件中appSettings配置节增加一对键值对
//////在*.exe.config文件中appSettings配置节增加一对键值对 /// /// /// 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"); }
5、修改IP地址
// 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;
}
修改IP地址
config 读写方法
using System.Configuration;
//省略其他代码
public SalesOrderData()
{
string str = "";
str = ConfigurationManager.ConnectionStrings["kyd"].ToString();
conn = new SqlConnection(str);
cmd = conn.CreateCommand();
}
实际应用：
1、获取配置节的值
button1 点击获取配置节
button2 点击获取配置节
结果为：
2、修改配置节的值
button1 点击获取配置节
button2 点击修改配置节
button3 点击获取配置节
结果为：
此时配置文件key1的value值为，获取key值仍为修改前的值
如何重置为修改前的值？
如何保存修改后的值？
