在Winform中動態讀寫app.config文件 https://blog.csdn.net/kingmax54212008/article/details/38987277?spm=1001.2101.3001.6650.7&utm_medium=distribute.pc_relevant.n ...

在Winform中動態讀寫app.config文件

https://blog.csdn.net/kingmax54212008/article/details/38987277?spm=1001.2101.3001.6650.7&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-7-38987277-blog-82746084.235%5Ev36%5Epc_relevant_default_base3&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-7-38987277-blog-82746084.235%5Ev36%5Epc_relevant_default_base3&utm_relevant_index=12

1、首先需要在項目中引用：System.Configuration

2、通過OpenExeConfiguration（）這個方法來對配置文件進行操作

若當前項目的配置文件如下：

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<?xml version="1.0"?>
<configuration>
<appSettings>
<clear />
<add key="DataSource" value=".\SQL2005"/>
<add key="InitialCatalog" value="db"/>
<add key="UserId" value="sa"/>
<add key="Password" value="sa"/>
<add key="ConnectTimeout" value="1000"/>
</appSettings>
<startup>
<supportedRuntime version="v2.0.50727"/>
</startup>
</configuration>

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需要對上面appSettings的鍵值作修改，如下代碼所示：

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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());
// 保存對配置文件所作的更改
config.Save(ConfigurationSaveMode.Modified);
// 強制重新載入配置文件的ConnectionStrings配置節
ConfigurationManager.RefreshSection("appSettings");

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其中它是不能直接修改健值的，是在修改之前要刪除該鍵值，然後重新添加

同是，上面的只是對AppSettings進行操作，其實也可以對ConnectionStrings、SectionGroups、Sections進行操作

讀取所有的AppSettings的值

StringBuilder str = new StringBuilder();
str.Append("<table class='isTable'><tr><th></th><th>用戶名</th><th>webservices地址</th><th>webservices方法名稱</th></tr>");
AppSettingsReader reader =
new AppSettingsReader();

NameValueCollection appStgs =
ConfigurationManager.AppSettings;

string[] names =
ConfigurationManager.AppSettings.AllKeys;

String value = String.Empty;

for (int i = 0; i < appStgs.Count; i++)
{

string key = names[i];
if (key.IndexOf("WebSiteUser") >= 0)
{
value = (String)reader.GetValue(key, value.GetType());
string[] strValue = value.Split(',');
string webservices = strValue[0];
string method = strValue[1];
str.Append("<tr><td><a style='color:White;text-decoration: none;' href=\"/sdmin/EditWebSiteUser?key=" + key + "\"><img src='../../Content/icons/admin_edit.png' alt='' title='編輯'/></a></td><td>" + key.Replace("WebSiteUser", "") + "</td><td>" + webservices + "</td><td>" + method + "</td></tr>");
}

}
str.Append("</table>");
ViewData["ListWebSiteUser"] = str;
return View();

Winform—C#讀寫config配置文件

現在FrameWork2.0以上使用的是：ConfigurationManager或WebConfigurationManager。並且AppSettings屬性是只讀的，並不支持修改屬性值．

一、如何使用ConfigurationManager？

1、添加引用：添加System.configguration

2、引用空間

3、config配置文件配置節

常用配置節：

（1）普通配置節

</appSettings>

（2）數據源配置節

（3）自定義配置節

二、config文件讀寫

1、依據連接串名字connectionName返回數據連接字元串

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//依據連接串名字connectionName返回數據連接字元串  
        public static string GetConnectionStringsConfig(string connectionName)
        {
            //指定config文件讀取
            string file = System.Windows.Forms.Application.ExecutablePath;
            System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(file);
            string connectionString =
                config.ConnectionStrings.ConnectionStrings[connectionName].ConnectionString.ToString();
            return connectionString;
        }

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2、更新連接字元串

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///<summary> 
        ///更新連接字元串  
        ///</summary> 
        ///<param name="newName">連接字元串名稱</param> 
        ///<param name="newConString">連接字元串內容</param> 
        ///<param name="newProviderName">數據提供程式名稱</param> 
        public static void UpdateConnectionStringsConfig(string newName, string newConString, string newProviderName)
        {
            //指定config文件讀取
            string file = System.Windows.Forms.Application.ExecutablePath;
            Configuration config = ConfigurationManager.OpenExeConfiguration(file);

            bool exist = false; //記錄該連接串是否已經存在  
            //如果要更改的連接串已經存在  
            if (config.ConnectionStrings.ConnectionStrings[newName] != null)
            {
                exist = true;
            }
            // 如果連接串已存在，首先刪除它  
            if (exist)
            {
                config.ConnectionStrings.ConnectionStrings.Remove(newName);
            }
            //新建一個連接字元串實例  
            ConnectionStringSettings mySettings =
                new ConnectionStringSettings(newName, newConString, newProviderName);
            // 將新的連接串添加到配置文件中.  
            config.ConnectionStrings.ConnectionStrings.Add(mySettings);
            // 保存對配置文件所作的更改  
            config.Save(ConfigurationSaveMode.Modified);
            // 強制重新載入配置文件的ConnectionStrings配置節  
            ConfigurationManager.RefreshSection("connectionStrings");
        }

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3、返回*.exe.config文件中appSettings配置節的value項

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///<summary> 
        ///返回*.exe.config文件中appSettings配置節的value項  
        ///</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;
        }

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4、在*.exe.config文件中appSettings配置節增加一對鍵值對

複製代碼

///<summary>  
        ///在*.exe.config文件中appSettings配置節增加一對鍵值對  
        ///</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");
        }

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5、修改IP地址

// 修改system.serviceModel下所有服務終結點的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中服務的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 讀寫方法

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using System.Configuration;
//省略其他代碼
public SalesOrderData()
        {
            string str = "";
            str = ConfigurationManager.ConnectionStrings["kyd"].ToString();
            conn = new SqlConnection(str);
            cmd = conn.CreateCommand();
        }

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實際應用：

1、獲取配置節的值

button1 點擊獲取配置節<appSettings>指定key的value值

button2 點擊獲取配置節<connectionStrings>指定name的connectionString值