Windows 10 Universal Windows Platform – Text Editor

Step 1

Download Visual Studio Community 2015 and install it onto your computer, if it’s already downloaded and installed select Launch to start Visual Studio Community 2015 or if it has already been downloaded and installed then start the application you may also need to Enable your device for development.

10-home

Step 2

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

10-file-new-project

Step 3

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

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Step 4

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

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Step 5

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

10-add-new-item-library

Step 6

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

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

public class Library
{    
    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 async void New(TextBox display)
    {
        if (await Confirm("Create New Document?", "Text Editor", "Yes", "No"))
        {
            display.Text = string.Empty;
        }
    }

    public async void Open(TextBox display)
    {
        try
        {
            FileOpenPicker picker = new FileOpenPicker();
            picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
            picker.FileTypeFilter.Add(".txt");
            StorageFile file = await picker.PickSingleFileAsync();
            display.Text = await FileIO.ReadTextAsync(file);
        }
        catch
        {

        }
    }

    public async void Save(TextBox display)
    {
        try
        {
            FileSavePicker picker = new FileSavePicker();
            picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
            picker.FileTypeChoices.Add("Plain Text", new List<string>() { ".txt" });
            picker.DefaultFileExtension = ".txt";
            picker.SuggestedFileName = "Document";
            StorageFile file = await picker.PickSaveFileAsync();
            if (file != null)
            {
                CachedFileManager.DeferUpdates(file);
                await FileIO.WriteTextAsync(file, display.Text);
                FileUpdateStatus status = await CachedFileManager.CompleteUpdatesAsync(file);
            }
        }
        catch
        {

        }
    }
}

It should then appear as such:

10-library-texteditor

Step 7

From the Solution Explorer select MainPage.xaml

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Step 8

Select from the Menu, View then Designer

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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"/>
		</StackPanel>
	</AppBar>
</Page.BottomAppBar>

While still in the XAML View below <Grid Background=”{ThemeResource ApplicationPageBackgroundThemeBrush}”>enter the following XAML:

<TextBox Name="Display" AcceptsReturn="True" TextWrapping="Wrap" VerticalAlignment="Stretch"/>

It should appear as such:

10-xaml-texteditor

Step 10

Select from the Menu, View then Code

10-code

Step 11

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

public Library Library = new Library();

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

private void Open_Click(object sender, RoutedEventArgs e)
{
	Library.Open(Display);
}

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

It should then appear as such:

10-code-texteditor

Step 12

That completes the Windows Universal Application so Save the Project then select the Debug and Simulator option to run the Application

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Step 13

Once the Simulator has started the Application should then appear

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Step 14

After the Application has started running you can then type in any text then you can Save the document to Open later or start a New document

10-simulator-ran-texteditor

Step 15

To Exit the application select Stop Debugging in Visual Studio Community 2015

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Step 16

Another option is to run as a Windows Phone application, select Debug and select Emulator 10.0.1.0 WVGA 4 inch 512MB option to run the Application

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Step 17

Once the Emulator has started the Application should then appear

10-emulator-run-texteditor

Step 18

After the Application has started running you can then type in any text then you can Save the document to Open later or start a New document

10-emulator-ran-texteditor

Step 19

To Exit the application select Stop Debugging in Visual Studio Community 2015

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4 thoughts on “Windows 10 Universal Windows Platform – Text Editor

    • Question: is it possible to check if a text document is opened so the user can “Save” instead “Save as…”
      Example: New | Open | Save | Save as…
      Is it possible to add encoding like UTF-8/ASCII etc.?

      Like

      • To do “Save As” you could have it when you do “Open” this then sets the file to a StorageFile variable that the Save As uses so you don’t need the picker because you already have the file to save to. If you open a UTF-8 file it will use that encoding when saved – so it detects the existing encoding and reuses it, but I think that it might be Unicode only but am not sure, to use ASCII you can use WriteBytesAsync by converting the text to a byte array, but I’ve not tried this myself but might help as a start.

        Like

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