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玩转App.Config

 在做Winform开发时,免不了把一些配置信息写到APP.CONFIG文件中,当程序生成后APP.CONFIG会变成以程序名+CONFIG的文件即,如程序名为A,那么生成后的APP.CONFIG文件会变成A.EXE.CONFIG文件!

       直接上代码,不解释:


/// <summary> 
/// 配置类型 
/// </summary> 
public enum configType { appSettings, connectionStrings } 
 
public static string GetConfig(configType cType, string keyOrName) 

    string result = string.Empty; 
    if (cType == configType.appSettings) result = System.Configuration.ConfigurationManager.AppSettings[keyOrName]; 
    else if (System.Configuration.ConfigurationManager.ConnectionStrings[keyOrName] != null) 
        result = System.Configuration.ConfigurationManager.ConnectionStrings[keyOrName].ConnectionString; 
 
    return result == null ? string.Empty : result; 

/// <summary> 
/// 读取应用程序配置值,无相应项则返回String.Empty 
/// </summary> 
/// <param name="key">配置标识码</param> 
/// <returns></returns> 
public static string GetAppSettings(string key) 

    return GetConfig(configType.appSettings, key); 

/// <summary> 
/// 修改或新建配置项  www.zzzyk.com
/// </summary> 
/// <param name="key">配置标识码</param> 
/// <param name="val">配置项的值</param> 
public static void SetAppSettings(string key, string val) 

    SetConfig(configType.appSettings, key, val); 

public static void SetConfig(configType cType, string keyOrName, string val) //传2个参数 一个是配置文件键的名字,一个是要给这个键的值 

    try 
    { 
        XmlDocument xDoc = new XmlDocument();     //定义XmlDocument,想操作xml一般都用这个类 
        string path = biovision.ihospital.his.dbCommon.db.configFilePath; //获取App.config文件绝对路径 
        //string str = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase;  //这是获取配置文件路径的 
        //str = str.Substring(0, str.Length - 10) + "App.config"; //这是获取配置文件的名称 
 
 
        xDoc.Load(path); //读取xml 
        XmlNode xNode;     //xml节点 
        XmlElement xElemCurrent;  //xml元素 
        XmlElement xElemNew;  //xml元素 
        if (cType == configType.connectionStrings) 
        { 
            xNode = xDoc.SelectSingleNode("//connectionStrings"); 
            xElemCurrent = (XmlElement)xNode.SelectSingleNode("//add[@name='" + keyOrName + "']"); 
            if (xElemCurrent != null) 
                xElemCurrent.SetAttribute("connectionString", val);//如果有这个键就给他赋值 
            else 
            {//没有这个键就添加一个键并且赋值 
                xElemNew = xDoc.CreateElement("add"); 
                xElemNew.SetAttribute("name", keyOrName); 
                xElemNew.SetAttribute("connectionString", val); 
                xElemNew.SetAttribute("providerName", "System.Data.SqlClient"); 
                xNode.AppendChild(xElemNew); 
            } 
        } 
        else 
        { 
            xNode = xDoc.SelectSingleNode("//appSettings"); 
            xElemCurrent = (XmlElement)xNode.SelectSingleNode("//add[@key='" + keyOrName + "']"); 
            if (xElemCurrent != null) 
                xElemCurrent.SetAttribute("value", val);//如果有这个键就给他赋值  AppValue 就是值 
            else 
            {//没有这个键就添加一个键并且赋值 
                xElemNew = xDoc.CreateElement("add"); 
                xElemNew.SetAttribute("key", keyOrName); 
                xElemNew.SetAttribute("value", val); 
                xNode.AppendChild(xElemNew); 
            } 
        } 
        xDoc.Save(path); 
    } 
    catch (Exception e) 
    { 
        Log.LogException(e, "写config配置文件出错。"); 
    } 
 

后来仔细想一想,其实还有下面一种方法也可以实现config的读写功能(MS提供的,可能更好)


Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); 
config.AppSettings.Settings[key].Value = value; 
config.Save(ConfigurationSaveMode.Modified); 
ConfigurationManager.RefreshSection(“appSettings”); 


摘自 欲将心事诉东风,无怨满城风得意~
 

补充:软件开发 , C# ,
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