如何编程序实现修改web.config中<add key="pagesize" value="5">字段的值。

Question

如何编程序实现修改web.config中<add key="pagesize" value="5">字段的值。

Answer 1

XmlDocument webconfigDoc = new XmlDocument();
string filePath = HttpContext.Current.Request.PhysicalApplicationPath + @"\web.config";                                                                
 string xPath = "/configuration/appSettings/add[@key='?']";
            webconfigDoc.Load(filePath);                   
            XmlNode passkey = webconfigDoc.SelectSingleNode(xPath.Replace("?","pwd"));
            passkey.Attributes["value"].InnerText ="";
            webconfigDoc.Save(filePath)