http://www.c-sharpcorner.com/UploadFile/dpatra/InitParamsInSilverlight06302009024633AM/InitParamsInSilverlight.aspx
http://msdn.microsoft.com/en-us/library/cc189004(v=VS.95).aspx
Step 1 :
Configure the WCF Service URL at web.config file
1: <configuration>
2: <appSettings>
3: <add key="myWCFServiceUrl" value="http://SomeServer:55460/myWCFService.svc" />
4: </appSettings>
5: </configuration>
Step 2 :
Supply the configured URL as a initparameters Silverlight
1: <form id="form1" runat="server" style="height:100%">
2: <div id="silverlightControlHost">
3: <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%">
4: <param name="InitParams" value='myWCFServiceUrlParameter= <% =ConfigurationManager.AppSettings["myWCFServiceUrl"].ToString()%> '/>
5: <param name="source" value="ClientBin/mySilverlight.xap"/>
6: <param name="onError" value="onSilverlightError" />
7: <param name="background" value="white" />
8: <param name="minRuntimeVersion" value="4.0.50826.0" />
9: <param name="autoUpgrade" value="true" />
10: <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50826.0" style="text-decoration:none">
11: <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/>
12: </a>
13: </object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div>
14: </form>
Step 3 :
Modify the app.xaml.cs file to read the init parameters
1: public static string myWCFServiceURL = "";
2: public App()
3: {
4: this.Startup += this.Application_Startup;
5: this.Exit += this.Application_Exit;
6: this.UnhandledException += this.Application_UnhandledException;
7:
8: InitializeComponent();
9: }
10:
11: private void Application_Startup(object sender, StartupEventArgs e)
12: {
13: if (e.InitParams.ContainsKey("myWCFServiceUrlParameter") && !string.IsNullOrEmpty(e.InitParams["myWCFServiceUrlParameter"]))
14: myWCFServiceURL = e.InitParams["myWCFServiceUrlParameter"];
15: this.RootVisual = new MainPage();
16: }
Step 4 :
use the URL during the WCF Client creation in Silverlight
1: myWCFServiceClient = new myWCFServiceClient(new BasicHttpBinding(), new EndpointAddress(App.myWCFServiceURL));