c# - Ling-to-Sql issue when bind SQL to WP8 using WebService -

i have tried create first wp8 application bind data sql database. followed this tutorial black page appears.

as there no listbox in wp8 tools used longlistselector following:

mainpage.xaml

 shell:systemtray.isvisible="true">  <phone:phoneapplicationpage.resources>     <datatemplate x:key="toursdatatemplate">         <stackpanel orientation="horizontal">             <textblock margin="10" text="{binding name}"/>          </stackpanel>     </datatemplate>   </phone:phoneapplicationpage.resources>  <!--layoutroot root grid page content placed--> <grid x:name="layoutroot" background="transparent">     <grid.columndefinitions>         <columndefinition width="9*"/>         <columndefinition width="7*"/>     </grid.columndefinitions>     <grid.rowdefinitions>         <rowdefinition height="auto"/>         <rowdefinition height="*"/>     </grid.rowdefinitions>       <phone:longlistselector          x:name="mylonglistselectors"          itemssource="{binding}"          itemtemplate="{staticresource toursdatatemplate}"          />    

this mainpage.xaml.cs

using phoneapp1.resources; using phoneapp1.toursservicereference1;   namespace phoneapp1 {     public partial class mainpage : phoneapplicationpage     {         // constructor         public mainpage()         {             initializecomponent();              // sample code localize applicationbar             //buildlocalizedapplicationbar();         }         private void phoneapplicationpage_loaded(object sender, routedeventargs e)         {             toursservicereference1.toursservice1client serviceclient = new toursservicereference1.toursservice1client();              serviceclient.getallklientscompleted += new eventhandler<toursservicereference1.getallklientscompletedeventargs>(serviceclient_getallklientscompleted);          serviceclient.getallklientsasync();     }     private void serviceclient_getallklientscompleted(object sender, toursservicereference1.getallklientscompletedeventargs e)     {         if (e.result != null)         {             mylonglistselectors.itemssource = e.result;         }      } 

in case should provide more information please let me know. hope not receive down-votes quiet low-quality question.

there no sign of error or similar.

thank time.

what expect see exactly?

you doing nothing inside serviceclient_getallklientscompleted method. list empty not providing data display

private void serviceclient_getallklientscompleted(object sender, toursservicereference1.getallklientscompletedeventargs e)         {             if (e.result != null)             {                 //set data context of list here              }          }