Silverlight parameters

Scenario:
Silverlight and SharePoint 2010 is great combination. Here's a quick post of how to pass parameters to Silverlight and consume them in Silverlight.

Solution #1: (Initialization Parameters)
This is most commonly used way to pass the values. This is how we declare it.

ASPX(C#)

<asp:Silverlight ID="Xaml1" runat="server" 
    Source="~/ClientBin/InitParamsMgr.xap" 
    MinimumVersion="2.0.31005.0" Width="100%" Height="100%"
    InitParameters="param1=value1,param2=value2">
</asp:silverlight>

HTML

<object id="SilverlightPlugin1" width="300" height="300"
    data="data:application/x-silverlight-2," 
    type="application/x-silverlight-2" >
    <param name="source" value="SilverlightApplication1.xap"/>
    <param name="InitParams" value="param1=value1,param2=value2" />
    <!-- Display installation image. -->
    <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50401.0" 
        style="text-decoration: none;">
        <img src="http://go.microsoft.com/fwlink/?LinkId=161376" 
            alt="Get Microsoft Silverlight" 
            style="border-style: none"/>
    </a>
</object>

How to use it in Silverlight:
1. Add the following code Application_Startup method.

private void Application_Startup(object sender, StartupEventArgs e)
      {
          if (e.InitParams != null)
          {
              foreach (var item in e.InitParams)
              {
                  this.Resources.Add(item.Key, Uri.UnescapeDataString(item.Value));              }
          }
          this.RootVisual = new MainPage();
      }

2. Open MainPage.xaml.cs and add the following method

private string GetParam(string p)
      {
          if (App.Current.Resources[p] != null)
              return App.Current.Resources[p].ToString();
          else return string.Empty;
      }

3. Use the following code to read the parameter value

string param1value = GetParam("param1");

Solution #2: ( Query Parameters )
How to use it in Silverlight:
1. Add the following code Application_Startup method.

private void Application_Startup( object sender, StartupEventArgs e ){  
    this.RootVisual = new MainPage();
    string queryParam = HtmlPage.Document.QueryString["key"];
    this.Resources.Add( <resourcekey>, queryParam );
}

2. Use the following code to read the parameter value
in XAML

<silverlightcontrol property={StaticResource ResourceKey} />

or in C#

object parameter = ((App)Application.Current).Resources[<Resourcekey>];

Article:
How to pass initialize parameters..

Related and Referred Articles:
MSDN
Decoding paramters