博客

//读

public static string GetValue(string AppKey)

{


try

{


string AppKeyValue;

AppKeyValue=System.Configuration.ConfigurationSettings.AppSettings.Get(AppKey);

return AppKeyValue;

}

catch(Exception ex)

{


throw ex;

}

}

//写

public static void SetValue(string AppKey,string AppValue)

{


//System.Configuration.ConfigurationSettings.AppSettings.Set(AppKey,AppValue);

XmlDocument xDoc = new XmlDocument();

xDoc.Load(System.Windows.Forms.Application.ExecutablePath + “.config”);

XmlNode xNode;

XmlElement xElem1;

XmlElement xElem2;

xNode = xDoc.SelectSingleNode(“//appSettings”);

xElem1 = (XmlElement)xNode.SelectSingleNode(“//add[@key=”” + AppKey + “”]”);

if ( xElem1 != null ) xElem1.SetAttribute(“value”,AppValue);

else

{


xElem2 = xDoc.CreateElement(“add”);

xElem2.SetAttribute(“key”,AppKey);

xElem2.SetAttribute(“value”,AppValue);

xNode.AppendChild(xElem2);

}

xDoc.Save(System.Windows.Forms.Application.ExecutablePath + “.config”);

}

看到第二个方法中注释掉的那一行吗?本来以为可以象读一样简单的完成协定俄操作.结果,不幸,得把app.config文件当作一个普通的XML文件来进行写的操作才可以!