Code for How to Save Phone Number in Windows Phone 7 via WCF Enabled Service

<!--TitlePanel contains the name of the application and page title-->
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock x:Name="ApplicationTitle" Text="Vijay's Save Phone Number Application" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="PageTitle" Text="Windows 7 Phone" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>

<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<TextBlock Height="30" HorizontalAlignment="Left" FontFamily="Verdana" FontSize="22" Margin="120,49,0,0" Name="textBlock1" Text="Please Enter Number" VerticalAlignment="Top" Width="253" />
<TextBox Height="72" HorizontalAlignment="Left" Margin="94,101,0,0" Name="textBox1" VerticalAlignment="Top" Width="279" />
<Button Content="Save" FontFamily="Verdana" FontSize="22" Height="72" HorizontalAlignment="Left" Margin="154,215,0,0" Name="button1" VerticalAlignment="Top" Width="160" Click="button1_Click" />
<TextBlock Height="30" HorizontalAlignment="Left" Margin="94,368,0,0" Name="textBlock2" FontFamily="Verdana" FontSize="22" VerticalAlignment="Top" Width="331" />
</Grid>
</Grid>

<!--Sample code showing usage of ApplicationBar-->
<!--<phone:PhoneApplicationPage.ApplicationBar>
<shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
<shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1"/>
<shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2"/>
<shell:ApplicationBar.MenuItems>
<shell:ApplicationBarMenuItem Text="MenuItem 1"/>
<shell:ApplicationBarMenuItem Text="MenuItem 2"/>
</shell:ApplicationBar.MenuItems>
</shell:ApplicationBar>
</phone:PhoneApplicationPage.ApplicationBar>-->

</phone:PhoneApplicationPage>

The Complete Code of MainPage.xaml.cs looks like this:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Tasks;
using Save_Phone_Number_Application.ServiceReference1;

namespace Save_Phone_Number_Application
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
public MainPage()
{
InitializeComponent();

}

private void button1_Click(object sender, RoutedEventArgs e)
{
if (textBox1.Text == "")
{
textBlock2.Text = "Please Enter Phone Number";
textBlock2.Foreground = new SolidColorBrush(Colors.Red);
}
else
{
Service1Client objClient = new Service1Client();
objClient.NumberCompleted += new EventHandler<NumberCompletedEventArgs>(NumberCall);
objClient.NumberAsync(textBox1.Text);

}
}
static void NumberCall(object sender, NumberCompletedEventArgs e)
{
SavePhoneNumberTask objSavePhoneNumber = new SavePhoneNumberTask();
objSavePhoneNumber.PhoneNumber = e.Result;
objSavePhoneNumber.Show();

}
void SavePhoneCompleted(object sender, TaskEventArgs e)
{
switch (e.TaskResult)
{
case TaskResult.OK:
MessageBox.Show("Phone Number Saved");
break;

case TaskResult.Cancel:
MessageBox.Show("Phone Number Cancelled");
break;

case TaskResult.None:
MessageBox.Show("Phone Number NotSaved");
break;

}
}

private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
SavePhoneNumberTask objTask = new SavePhoneNumberTask();
objTask.Completed += new EventHandler<TaskEventArgs>(SavePhoneCompleted);
}
}
}

The Output of the Application looks like this:

The Output of Number Entered Application looks like this:

The Output of Saving Phone Number Application looks like this:

The Output of Added Name and Photo Application looks like this:

The Output of Call and Sms for Added User Application looks like this:

The Output of Added User Call Application looks like this:

The Output of Added User SMS Application looks like this:

The Output of Nothing Entered Data Application looks like this:

I hope this article is useful for you.