The Windows Phone 8 SDK provides the MapsDirectionsTask launcher which allows the users to get the route or direction from the built-in maps application in windows phone 8.

To get the route, simply create an instance of the MapsDirectionsTask, set the Start and End co-ordinates and call the Show method. If the Start property is not set, the phone takes the current location as the starting point.

How to Display Directions via Built-in Maps in Windows Phone 8 App?

XAML

<phone:PhoneApplicationPage

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"

xmlns:maps="clr-namespace:Microsoft.Phone.Maps.Controls;assembly=Microsoft.Phone.Maps"

x:Class="MobileOSGeekMaps.MainPage"

mc:Ignorable="d"

FontFamily="{StaticResource PhoneFontFamilyNormal}"

FontSize="{StaticResource PhoneFontSizeNormal}"

Foreground="{StaticResource PhoneForegroundBrush}"

SupportedOrientations="Portrait" Orientation="Portrait"

shell:SystemTray.IsVisible="True">

<Grid x:Name="LayoutRoot" Background="Transparent">

<Grid.RowDefinitions>

<RowDefinition Height="Auto" />

<RowDefinition Height="*" />

</Grid.RowDefinitions>

<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">

<TextBlock Text="@ISENTHIL" Style="{StaticResource PhoneTextNormalStyle}" Margin="12,0" />

<TextBlock Text="MOBILEOSGEEK" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}" FontSize="48" />

</StackPanel>

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">

<Button x:Name="MapsBtn" Content="Get Direction" HorizontalAlignment="Left" Height="133" Margin="27,68,0,0" VerticalAlignment="Top" Width="419" Click="MapsBtn_Click" />

</Grid>

</Grid>

</phone:PhoneApplicationPage>

C#(Code Behind)

using Microsoft.Phone.Controls;

using Microsoft.Phone.Maps;

using Microsoft.Phone.Shell;

using Microsoft.Phone.Tasks;

using MobileOSGeekMaps.Resources;

using System;

using System.Collections.Generic;

using System.Device.Location;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Navigation;

namespace MobileOSGeekMaps

{

public partial class MainPage : PhoneApplicationPage

{

// Constructor

public MainPage()

{

InitializeComponent();

}

private void Map1_Loaded(object sender, RoutedEventArgs e)

{

}

private void MapsBtn_Click(object sender, RoutedEventArgs e)

{

MapsDirectionsTask direction = new MapsDirectionsTask();

direction.End = new LabeledMapLocation("End", new GeoCoordinate(13.0022, 077.5980));

direction.Show();

}

}

}