從aspx傳遞參數到xaml

Question

嗨我是Silverlight中的新成員。下面是我的aspx代碼

<div id="silverlightControlHost"> 
    <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%"> 
     <param name="source" value="ClientBin/ICartPrinting.xap"/> 
     <param name="onError" value="onSilverlightError" /> 
     <param name="background" value="white" /> 
     <param name="minRuntimeVersion" value="5.0.61118.0" /> 
     <param name="initparams" id="initParams" runat="server" value="key1=10" /> 
     <param name="autoUpgrade" value="true" /> 
     <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=5.0.61118.0" style="text-decoration:none"> 
      <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/> 
     </a> 
    </object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div> 

我使用initparams標籤傳遞價值10。我MainPage.xaml代碼是

private void Application_Startup(object sender, StartupEventArgs e) 
    { 
     var paramvalues = e.InitParams; 
     foreach (var item in paramvalues) 
     { 
      MessageBox.Show(item.Value);  
     } 
    } 

按照此代碼消息框應該是表演，但是當我運行的應用程序，沒有消息框出現是。我也無法調試silverlight代碼。任何幫助將被appriciated。謝謝

Answer 1

我不認爲你可以在應用程序啓動過程中調用可視化控件。試試這樣得到值：

<param name="initParams" value="key1=10" /> 

private void Application_Startup(object sender, StartupEventArgs e) 
{ 
    foreach (var item in e.InitParams) 
    { 
     this.Resources.Add(item.Key, item.Value); 
    } 

    this.RootVisual = new MainPage(); 
} 


public partial class MainPage : UserControl 
{ 
    string module = string.Empty; 
    int key1 = 0; 

    public MainPage() 
    { 
     InitializeComponent(); 

     this.Loaded += new RoutedEventHandler(MainPage_Loaded); 
    } 

    void MainPage_Loaded(object sender, RoutedEventArgs e) 
    { 

     if (App.Current.Resources.Contains("key1")) 
     { 
      int.TryParse(App.Current.Resources["key1"].ToString(), out key1); 
     } 

    } 
} 

Answer 2

你必須先設置RootVisual，然後才能顯示MessageBox。

private void Application_Startup(object sender, StartupEventArgs e) 
{ 
    this.RootVisual = new MainPage(); 

    var paramvalues = e.InitParams; 
    foreach (var item in paramvalues) 
    { 
     MessageBox.Show(item.Value);  
    } 
}