修改app文件

   //修改app
    SetConfigValue("..\\..\\App.config", "appSettings", mfserver);  

 

 //读取并修改app.config文件
        public void SetConfigValue(string path, string appKey, string Context)
        {
            XmlDocument xDoc = new XmlDocument();
            string[] mfArr = Context.Split(',');
            try
            {
                xDoc.Load(path);
                XmlNodeList appsetting = xDoc.GetElementsByTagName(appKey);
                XmlNodeList xnl = appsetting[0].ChildNodes;

                XmlNode xNode = xDoc.SelectSingleNode("//appSettings");

                bool flagIP = false;
                bool flagPort = false;
                for (int i = 0; i < xnl.Count; i++)
                {
                    if (xnl[i].Attributes["key"].Value == "MFServerIP")
                    {
                        xnl[i].Attributes["value"].Value = mfArr[0];
                        flagIP = true;
                    }
                    if (xnl[i].Attributes["key"].Value == "MFServerPort")
                    {
                        xnl[i].Attributes["value"].Value = mfArr[1];
                        flagPort = true;
                    }
                }
                //没有MFServerIP,MFServerPort节点则添加
                if (flagIP == false)
                {
                    XmlElement xElem = xDoc.CreateElement("add");
                    xElem.SetAttribute("key", "MFServerIP");
                    xElem.SetAttribute("value", mfArr[0]);
                    xNode.AppendChild(xElem);

                }
                if (flagPort == false)
                {
                    XmlElement xElem = xDoc.CreateElement("add");
                    xElem.SetAttribute("key", "MFServerPort");
                    xElem.SetAttribute("value", mfArr[1]);
                    xNode.AppendChild(xElem);

                }
s                xDoc.Save(path);
                MessageBox.Show("Configure Successfully");

            }
            catch (Exception)
            {
                MessageBox.Show("Configure Failed");
            }
        }