读取XML文件的指定节点的值 并转换为Item

                cmb_State_Send.ItemsSource = null;
                XmlDocument doc = new XmlDocument();
                doc.Load("D:\\模板\\WorkstationState_Config.xml");    //加载Xml文件  
                XmlElement rootElem = doc.DocumentElement;            //获取根节点           
                XmlNode xn = rootElem.SelectSingleNode("//Workstation[@Name=‘" + str + "‘]");
                if (xn != null)
                {
                    XmlNodeList xn1 = xn.ChildNodes;
                    List<string> tem = new List<string>();
                    for (int i = 0; i < xn1.Count; i++)
                    {
                        tem.Add(xn1.Item(i).InnerText);
                    }
                    if (tem.Count > 0)
                    {
                        cmb_State_Send.ItemsSource = tem;
                        cmb_State_Send.SelectedIndex = 0;
                    }
                }