Windows Phone Navigation between Screens and sending data to next screen

It is always interesting to go for navigation between screens and Windows phone applications havea great flexibility regarding this. we can achieve navigation in just fem steps for this purpose :

1)  creat an application with name  HelloWorldAdvanced and edit the MainPage.xaml and copy the lines given below to it


<phone:PhoneApplicationPage 
    x:Class="HelloWorldAdvanced.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--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="Navigation Demo" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock x:Name="PageTitle" Text="First Page" 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" Margin="42,37,0,0" Name="label_name" Text="Name" VerticalAlignment="Top" />
            <TextBlock Height="30" HorizontalAlignment="Left" Margin="42,132,0,0" Name="label_lastname" Text="Last Name" VerticalAlignment="Top" />
            <TextBox Height="72" HorizontalAlignment="Left" Margin="29,59,0,0" Name="txt_name" Text="" VerticalAlignment="Top" Width="460" />
            <TextBox Height="72" HorizontalAlignment="Left" Margin="29,154,0,0" Name="txt_lastname" Text="" VerticalAlignment="Top" Width="460" />
            <Button Content="Send" Height="72" HorizontalAlignment="Left" Margin="230,282,0,0" Name="button1" VerticalAlignment="Top" Width="160" Click="button1_Click" />
        </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>

2) Now in step two  just make sure that you have made a new page in application with name

SecondPage.xaml and copy the given below code to it


<phone:PhoneApplicationPage 
    x:Class="HelloWorldAdvanced.SecondPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    FontFamily="{StaticResource PhoneFontFamilyNormal}"
    FontSize="{StaticResource PhoneFontSizeNormal}"
    Foreground="{StaticResource PhoneForegroundBrush}"
    SupportedOrientations="Portrait" Orientation="Portrait"
    mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
    shell:SystemTray.IsVisible="True">

    <!--LayoutRoot is the root grid where all page content is placed-->
    <Grid x:Name="LayoutRoot" Background="Transparent">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <!--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="Navigated from screen one" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock x:Name="PageTitle" Text="Second Page" 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">
            <Button Content="Back" Height="72" HorizontalAlignment="Left" Margin="249,280,0,0" Name="button1" VerticalAlignment="Top" Width="160" Click="button1_Click" />
            <TextBlock Height="171" HorizontalAlignment="Left" Margin="50,47,0,0" Name="txt_fullname" Text="FullName" VerticalAlignment="Top" Width="340" />
        </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>

3) in step three go to  MainPage.xaml.cs and copy the code

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;

namespace HelloWorldAdvanced

{

    public partial class MainPage : PhoneApplicationPage

    {

        // Constructor

        public MainPage()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, RoutedEventArgs e)

        {

            NavigationService.Navigate(new Uri("/SecondPage.xaml?name="+ txt_name.Text 

                +"&lastname="+txt_lastname.Text,UriKind.RelativeOrAbsolute));

        }

    }

}

4) finally in this step you are ready to fly after copying the given below lines to  SecondPage.xaml.cs

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;

namespace HelloWorldAdvanced

{

    public partial class SecondPage : PhoneApplicationPage

    {

        public SecondPage()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, RoutedEventArgs e)

        {

            NavigationService.GoBack();

        }

        protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)

        {

            base.OnNavigatedTo(e);

            string name = "";

            string lastname = "";

            NavigationContext.QueryString.TryGetValue("name",out name);

            NavigationContext.QueryString.TryGetValue("lastname", out lastname);

            txt_fullname.Text = string.Format("Name: {0}\nLast Name: {1}",name,lastname);

        }

    }

}

5)Now run the program and you will get result:  fill the firstname and secondname fields and click the send button. to go back from second screen click back button :)