修改XML

          XmlDocument xmlDoc = new XmlDocument();//修改添加的一行
                xmlDoc.Load(strfile);//修改添加的一行
                XmlNodeList nodeList = xmlDoc.SelectSingleNode("config").ChildNodes;//获取bookstore节点的所有子节点
                foreach (XmlNode xn in nodeList)//遍历所有子节点
                {
                    XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型
                    //if (xe.Name == "name")//如果genre属性值为“李赞红”
                    //{

                    //    xe.InnerText = "wangw";

                    //}
                    switch (xe.Name)
                    {
                        case "name":
                            xe.InnerText = textBox1.Text;
                            name = textBox1.Text;
                            break;
                        case "pwd":
                            if (checkBox1.Checked == true)
                            {
                                xe.InnerText = cl.Encrypto(textBox2.Text);
                            }
                            else
                            {
                                xe.InnerText = "";
                            }
                            pwd = cl.Encrypto(textBox2.Text);
                            break;
                        case "num1":
                            xe.InnerText = textBox3.Text;
                            num1 = textBox3.Text;
                            break;
                        case "num2":
                            xe.InnerText = textBox4.Text;
                            num2 = textBox4.Text;
                            break;
                        case "num3":
                            xe.InnerText = textBox5.Text;
                            num3 = textBox5.Text;
                            break;
                        case "AutoLogin":
                            if (checkBox2.Checked == true)
                            {
                                xe.InnerText = "true";

                            }
                            else
                            {
                                xe.InnerText = "false";
                            }
                            break;
                        //case "server":
                        //    xe.InnerText = textBox6.Text;
                        //    break;
                        //case "port":
                        //    xe.InnerText = textBox7.Text;
                        //break;
                        default:
                            break;
                    }
                }
                xmlDoc.Save(strfile);//保存。