如何动态InitParamsn参数的输入

sl3中已经把过去的asp.net silverlight控制删除了，所以无法通过在aspx页里直接用silverlight控件在后台动态输入参数给xap文件。

解决办法如下：

1.在展示页中我使用了一个asp.net的Literal控件，此控件可以承载html代码。请注意<asp:Literal部分，代码如下:

 1:    <div id="silverlightControlHost"> 

 2:        <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%"> 

 3:    <param name="source" value="ClientBin/SilverlightApplication18.xap"/> 

 4:    <param name="onError" value="onSilverlightError" /> 

 5:    <param name="background" value="white" /> 

 6:    <param name="minRuntimeVersion" value="3.0.40624.0" /> 

 7:    <param name="autoUpgrade" value="true" /> 

 8:  <asp:Literal ID="ParamInitParams" runat="server"></asp:Literal> 

 9:    <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=3.0.40624.0" style="text-decoration:none"> 

10:      <img src="http://go.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" style="border-style:none"/> 

11:    </a> 

12:     </object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div> 

13:    </div>

2.为了测试，我们必须在后台做一下输入InitParamsn参数的动作。这里我输入了一个名字id的参数，它的值为jac,代码如下：

1:  protected void Page_Load(object sender, EventArgs e)

2:  {

3:      if (!IsPostBack)

4:      {

5:          ParamInitParams.Text = 

String.Format(@"<param name=""InitParams"" value=""{0}"" />", "id=jac");

6:      }

7:  }

3.现在到sl里如何接收InitParams参数了，在silverlight项目里我们要在app.xaml.cs里定义前取得InitParams参数:

1:  internal IDictionary<string, string> getdata;

2:  private void Application_Startup(object sender, StartupEventArgs e)

3:  {

4:      this.RootVisual = new MainPage();

5:      getdata = e.InitParams;

6:  }

4.为了测试sl里是否正确接收到InitParams，我们在Mainpage.xaml.cs里作一下显示的动作：

 1:  public MainPage() 

 2:   { 

 3:       InitializeComponent(); 

 4:       Loaded += new RoutedEventHandler(MainPage_Loaded); 

 5:   }

 6:  

 7:   void MainPage_Loaded(object sender, RoutedEventArgs e) 

 8:   { 

 9:       App myapp = (App)App.Current; 

10:       MessageBox.Show(myapp.getdata.First().Key + ":" + myapp.getdata.First().Value); 

11:   }