silverlight application

[E481610]

hi thanks for ur all replies,
as u told i tried my self for the web service calling ........its getting....
but
what the problem iam facing is ......web service is automatically getting called

but,
i want as.....".when i click the button the service should get called.....mean s "
i want to attach my webservice calling to the button click event......

please help me regarding this........

the code i have written in the button event class is shown below

 public MainPage()
        {
            InitializeComponent();
        }

        private void but1_Click(object sender, RoutedEventArgs e)
        {
            InitializeComponent();            
            Loaded +=new RoutedEventHandler(MainPage_Loaded);            
        }

        private void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            ServiceReference1.IwcfserviceClient web = new showto.ServiceReference1.IwcfserviceClient();
            web.showdataCompleted += new EventHandler<showto.ServiceReference1.showdataCompletedEventArgs>(web_showdataCompleted);
            web.showdataAsync();
        }

        private void web_showdataCompleted(object sender, showto.ServiceReference1.showdataCompletedEventArgs e)
        {
            showto.ItemsSource = e.Result;
        }
    }
}

please respond to this quickly........ .
Thanku so much