Windows 10 Technical Preview Universal Application – Task Editor

Step 1

Download Visual Studio 2015 CTP 6 and Download Tools for Windows 10 Technical Preview and install it onto your computer, if it’s already downloaded and installed select Launch to start Visual Studio 2015 CTP 6 or if it has already been downloaded and installed then start the application.

Step 2

Once Visual Studio 2015 CTP 6 has started select File, then New, then Project… from the Menu.

Step 3

From the New Project window select Visual C# then Windows 10 from Installed Templates then select Blank Application (UAP) from the list, then type in a Name and select a Location to save to before selecting Ok to create the Project.

Step 4

Once the Project is created select from the Menu, Project, then Add New Item…

Step 5

From the Add New Item window select Visual C# and Code from Installed then select Code File from the list, then type in the Name as “Shared.cs” before selecting Add to add the file to the Project

Step 6

Once in the Code View for Shared.cs the following should be entered:

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Xml.Linq;
using Windows.Storage;
using Windows.Storage.Pickers;
using Windows.Storage.Provider;
using Windows.UI.Popups;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Input;

public class Shared
{
    public delegate void OpenedEvent(List<CheckBox> value);
    public static event OpenedEvent Opened;



    public async Task<bool> Confirm(string content, string title, string ok, string cancel)
    {
        bool result = false;
        MessageDialog dialog = new MessageDialog(content, title);
        dialog.Commands.Add(new UICommand(ok, new UICommandInvokedHandler((cmd) => result = true)));
        dialog.Commands.Add(new UICommand(cancel, new UICommandInvokedHandler((cmd) => result = false)));
        await dialog.ShowAsync();
        return result;
    }

    public void Add(ref ListBox display, string value, KeyRoutedEventArgs args)
    {
        if (args.Key == Windows.System.VirtualKey.Enter)
        {
            try
            {
                CheckBox item = new CheckBox();
                item.Content = value;
                item.Foreground = display.Foreground;
                if (display.SelectedIndex > -1)
                {
                    // Insert after Selected
                    display.Items.Insert(display.SelectedIndex, item);
                }
                else
                {
                    // Add after End
                    display.Items.Add(item);
                }
            }
            catch
            {

            }
            display.Focus(FocusState.Keyboard);
        }
    }

    public void Remove(ref ListBox display)
    {
        if (display.SelectedIndex > -1)
        {
            display.Items.RemoveAt(display.SelectedIndex);
        }
    }

    public async void New(ListBox display)
    {
        if (await Confirm("Create New List?", "Task Editor", "Yes", "No"))
        {
            display.Items.Clear();
        }
    }

    private static async void read(StorageFile file)
    {
        try
        {
            if (file != null)
            {
                if (Opened != null)
                {
                    string value = await FileIO.ReadTextAsync(file);
                    List<CheckBox> list = new List<CheckBox>();
                    XElement xml = XElement.Parse(value);
                    if (xml.Name.LocalName == "tasklist")
                    {
                        foreach (XElement task in xml.Descendants("task"))
                        {
                            CheckBox item = new CheckBox();
                            item.IsChecked = task.FirstAttribute.Value.ToLower() == "checked";
                            item.Content = task.Value;
                            list.Add(item);
                        }
                    }
                    Opened(list);
                }
            }
        }
        catch
        {

        }
    }

    private static async void write(StorageFile file, string value)
    {
        try
        {
            if (file != null)
            {
                CachedFileManager.DeferUpdates(file);
                await FileIO.WriteTextAsync(file, value);
                FileUpdateStatus status = await CachedFileManager.CompleteUpdatesAsync(file);
            }
        }
        catch
        {

        }
    }

    public async void Open()
    {
        try
        {
            FileOpenPicker picker = new FileOpenPicker();
            picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
            picker.FileTypeFilter.Add(".tsk");
            read(await picker.PickSingleFileAsync());
        }
        catch
        {

        }
    }
    public async void Save(ListBox display)
    {
        try
        {
            XElement items = new XElement("tasklist");
            foreach (CheckBox item in display.Items)
            {
                items.Add(new XElement("task", item.Content, new XAttribute("value",
                ((bool)item.IsChecked ? "checked" : "unchecked"))));
            }
            string value = new XDocument(new XDeclaration("1.0", "utf-8", "yes"), items).ToString();
            FileSavePicker picker = new FileSavePicker();
            picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
            picker.FileTypeChoices.Add("Task List", new List<string>() { ".tsk" });
            picker.DefaultFileExtension = ".tsk";
            picker.SuggestedFileName = "Document";
            write(await picker.PickSaveFileAsync(), value);
        }
        catch
        {

        }
    }
}

It should then appear as such:

Step 7

From the Solution Explorer select the MainPage.xaml from the Project

Step 8

Select from the Main Menu, View then Designer

Step 9

The Design View will be displayed along with the XAML View and in this above <Grid Background=”{ThemeResource ApplicationPageBackgroundThemeBrush}”> enter the following XAML:

<Page.BottomAppBar>       
	<AppBar IsOpen="True" IsSticky="True">
		<StackPanel Orientation="Horizontal">
			<AppBarButton Name="New" Icon="Page" Label="New" Click="New_Click"/>
			<AppBarButton Name="Open" Icon="Folder" Label="Open" Click="Open_Click"/>
			<AppBarButton Name="Save" Icon="Save" Label="Save" Click="Save_Click"/>
			<AppBarButton Name="Remove" Icon="Remove" Label="Remove" Click="Remove_Click"/>
		</StackPanel>
	</AppBar>   
</Page.BottomAppBar>

While still in the XAML View below </Grid>enter the following XAML:

<Grid>
	<Grid.RowDefinitions>
		<RowDefinition Height="Auto"/>
		<RowDefinition Height="*"/>
	</Grid.RowDefinitions>
	<TextBox Grid.Row="0" Margin="20" KeyDown="Add_KeyDown" Name="Value"/>
	<ListBox Grid.Row="1" VerticalAlignment="Stretch" FontFamily="Segoe UI" FontSize="16" Name="Display"/>
</Grid>

It should appear as such:

Step 10

Select from the Main Menu, View then Code

Step 11

Once in the Code View below the public MainPage() { … } the following should be entered:

public Shared Shared = new Shared();

private void New_Click(object sender, RoutedEventArgs e)
{
	Shared.New(Display);
}

private void Open_Click(object sender, RoutedEventArgs e)
{
	Shared.Opened += (List<CheckBox> value) =>
	{
		Display.Items.Clear();
		foreach (CheckBox item in value)
		{
			item.Foreground = Display.Foreground;
			Display.Items.Add(item);
		}
	};
	Shared.Open();
}

private void Save_Click(object sender, RoutedEventArgs e)
{
	Shared.Save(Display);
}

private void Remove_Click(object sender, RoutedEventArgs e)
{
	Shared.Remove(ref Display);
}

private void Add_KeyDown(object sender, KeyRoutedEventArgs e)
{
	Shared.Add(ref Display, Value.Text, e);
}

It should then appear as such:

Step 12

That completes the Universal App Platform Application, so save the Project then select the Simulator option from the Debug Toolbar to run the Application

Step 13

Once the Simulator has started the Application should then appear

Step 14

After it has started running you can then type in some text in the upper textbox then press or tap enter to add a Task then you can Save the list to Open later or start a New list you can also tick the checkbox when the Task is done

Step 15

Select Close to close the message then to Exit the application select Stop Debugging in Visual Studio 2015 CTP 6

Step 16

Once close you can run this as a Phone application by select the Debug and select the Emulator 10.0.0.0 WVGA 4 inch 512MB option to run the Application