private void GetLoadNeed()
        {
            // 项目名称读取配置文件
            WebClient wcConfigXml = new WebClient();
            wcConfigXml.OpenReadCompleted += new OpenReadCompletedEventHandler(wcConfigXml_OpenReadCompleted);
            wcConfigXml.OpenReadAsync(new Uri(System.Windows.Browser.HtmlPage.Document.DocumentUri,
                                              "ConfigXml/AppGISConfig.xml"));
        }

        private void wcConfigXml_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
        {
            try
            {
                using (Stream s = e.Result)
                {
                    XDocument doc = XDocument.Load(s); //需要引用System.Xml.Linq


                    if (doc.Root != null)
                    {
                        XElement xElement = doc.Root.Element("AppGIS");
                        if (xElement != null)
                        {
                            XElement element = xElement.Element("ProjectName");
                            if (element != null)
                            {
                                string projectName = element.Value;
                            }
                        }
                    }
                }
            }
            catch
            {
            }
        }