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101 How to on Windows Phone – How to #76 – How to use the Maps Download Task in Windows Phone Application

 

In this article we are going to see how to use MapDownload Launcher task in Windows Phone application development. To get some basics about maps please refer to my previous article on How to use Maps in Windows Phone application. Map download Launcher task provides the user flexible option to download the Maps for offline use, using this task will show the list of available region maps to be downloaded locally to the device and can be used across in the application for offline navigation. Let us see the steps on how to achieve this task in our Windows Phone application development. Open Visual Studio 2012 IDE and create a new Windows Phone project with a valid project name as shown in the screen below.   [more]

image

Clicking on OK will create the project and the solution with the list of default files and folders that are required to run the application. It will take some time to create these files based on your system configuration, so once everything is ready we can see the Visual Studio IDE with the project as shown in the screen below.

image


Let us add some controls to trigger the Mapdownload task in the button click event, so add a button control alone to the application page as shown in the code below.

XAML Code:

[code:c#]

<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
            <TextBlock x:Name="ApplicationTitle" Text="F5debug How to Series" Style="{StaticResource PhoneTextNormalStyle}"/>
            <TextBlock x:Name="PageTitle" Text="Map Download" 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="Download Asia Map" HorizontalAlignment="Left" Margin="30,10,0,0" VerticalAlignment="Top" RenderTransformOrigin="0.434,0.523" Width="416" Click="Button_Click" Height="138"/>
        </Grid>

[/code]

image


Now in the button click event create an instance of the MapDownloaderTask and call the show method which will list down all the available maps to download locally as shown in the code below.

C# Code:

[code:c#]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using F5debugHowto76.Resources;
using Microsoft.Phone.Tasks;

namespace F5debugHowto76
{
    public partial class MainPage : PhoneApplicationPage
    {
        // Constructor
        public MainPage()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            MapDownloaderTask mapDownloaderTask = new MapDownloaderTask();
            mapDownloaderTask.Show();
        }

    }
}

[/code]

Now we are done with the code, just run the application by pressing F5 directly from the keyboard or we can use the Build and execute the project option from the tool bar to run the application. Once the Build is successful we can see the Windows Phone emulator with the application and the expected outputs as shown in the screen below.

image

About Author: Karthikeyan Anbarasan, Microsoft MVP (Most Valuable Professional) in ASP.NET/IIS Architecture. He is the Founder and Chief Editor of the www.f5debug.net website and has authored books on Windows Phone and Business Intelligence(SSIS). He is also a Passionate Speaker and a Blogger on Microsoft Technologies.

You can Join Me On: Facebook, Twitter, Google Plus, LinkedIn

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