我可以通过XBAP访问web.config吗？

Question

我将一个Silverlight 4应用程序移植到WPF/XBAP。该应用使用从web.config应用设置参数使用asp初始化的initParams。

与Silverlight不同，WPF缺少一个InitParams属性StartupEventArgs。

它肯定好像这将是BrowserInteropHelper会帮我做的事情，但我什么也没看到。

有什么方法可以在启动时从web.config中的配置参数访问应用程序？

Answer 1

我的解决方法是将Web服务添加到托管xbap的网站，并在应用程序启动时使用BrowserInteropHelper.Source确定端点地址的uri。

public class ConfigService : IConfigService 
{ 
    public WebConfiguration GetWebConfig() 
    { 
     var outDict = new Dictionary<string, string>(); 
     foreach (string key in WebConfigurationManager.AppSettings.AllKeys) 
     { 
      outDict.Add(key, WebConfigurationManager.AppSettings[key]); 
     } 
     var webconfig = new WebConfiguration(); 
     webconfig.AppSettings = outDict; 
     return webconfig; 
    } 
} 

[DataContract] 
public class WebConfiguration 
{ 
    [DataMember] 
    public Dictionary<string, string> AppSettings { get; set; } 
} 

这里的客户如何调用：

private void Application_Startup(object sender, StartupEventArgs e) 
{ 
    try 
    { 
     var b = new System.ServiceModel.BasicHttpBinding(); 

     string url; 

     // when running xbap directly in browser the port is -1 
     if(BrowserInteropHelper.Source.Port != -1) 
     { 
      url = String.Format("http://{0}:{1}/ConfigService.svc", 
      BrowserInteropHelper.Source.Host, 
      BrowserInteropHelper.Source.Port); 
     } 
     else 
     { 
      url = @"http://localhost.:51007/ConfigService.svc"; 
     } 
     var address = new System.ServiceModel.EndpointAddress(url); 
     SDDM3.ConfigServiceReference.ConfigServiceClient c = new ConfigServiceClient(b, address); 
     c.GetWebConfigCompleted +=new EventHandler<GetWebConfigCompletedEventArgs>(c_GetWebConfigCompleted); 
     c.GetWebConfigAsync(url); 
     this.MainWindow.Content = new UserControl1(); 
    } 
    catch (Exception ex) 
    { 
     MessageBox.Show(ex.Message); 
    } 
} 
void c_GetWebConfigCompleted(object sender, GetWebConfigCompletedEventArgs e) 
{ 
    if (e.Error == null) 
    { 
     // MessageBox.Show(e2.Result. 
     m_AppSettings = e.Result.AppSettings; 
     MessageBox.Show("got appsettings: " + e.Result.AppSettings.Count.ToString());     
     this.MainWindow.Content = new Page1(); 
    } 
    else 
    { 
     string msg; 
     if (e.UserState != null) 
      msg = String.Format("Unable to get config from: \n{0} \n{1}", e.UserState, e.Error.Message); 
     else 
      msg = String.Format("Unable to get config: \n{0}", e.Error.Message); 
     MessageBox.Show(msg); 
    } 
}