FluentSpreadsheets 0.1.1-alpha

FluentSpreadsheets

FluentSpreadsheets

FluentSpreadsheets.ClosedXML

FluentSpreadsheets.GoogleSheets

Overview

FluentSpreadsheets library consists of two APIs:

• Component API
  An API that provides a set of components, that can be used for building static UI with sheet cells as building blocks, as well as base logic for drawing defined component composition on the sheet.
• Sheets API
  An API that provides a set of abstractions to define sheet segments that will dynamically build components, providing a way to build dynamic UI based on given data, as well as a way to combine an output from sheet segments into a single component representing a built table.

Examples

• Student table

Component API

The base unit of component API is IComponent interface, it provides a basic interface to interact with all components.

public interface IComponent
{
    Size Size { get; }

    void Accept(IComponentVisitor visitor);
}

There are many derived interfaces from IComponent used to reflect on component type in IComponentVisitor.

All component implementations are internal, so to create an instance of a component you need to use a static class ComponentFactory.

Hint

You can import static members of ComponentFactory for cleaner code.

using static FluentSpreadsheets.ComponentFactory;

Usage

• Use .Label to create a label component. You can pass a string to it, or use a generic overload which will call ToString on the passed object (IFormattable overload supported).

  Label("Hello, World!");
  Label(2.2, CultureInfo.InvariantCulture);
  

• Use .VStack & .HStack to stack components vertically or horizontally.

  VStack
  (
      HStack
      (
          Label("Hello"),
          Label(",")
      ),
      Label("World!")
  )
  

  The result will be something like this:
  

  Stacks will automatically scale their children so they all will have an equal width/height and fill a rectangle.

• Use extension methods to style components.

  VStack
  (
      HStack
      (
          Label("Hello")
              .WithContentAlignment(HorizontalAlignment.Trailing)
              .WithTrailingBorder(BorderType.Thin, Color.Black),
          Label(",")
      ),
      Label("Styles!")
          .WithContentAlignment(HorizontalAlignment.Center, VerticalAlignment.Top)
          .WithTopBorder(BorderType.Thin, Color.Black)
          .WithRowHeight(20)
  ).WithBottomBorder(BorderType.Thin, Color.Black).WithTrailingBorder(BorderType.Thin, Color.Black);
  

  The result will be something like this:
  

Output

Code above will only produce component composition stored as objects in memory. To render it on the sheet, you need to use IComponentRenderer<T>.

Now supported:

• Excel output via "ClosedXML" library. (You will need to reference a FluentSpreadsheets.ClosedXML NuGet package)

  var workbook = new XLWorkbook();
  var worksheet = workbook.AddWorksheet("Sample");
  
  var helloComponent =
      VStack
      (
          HStack
          (
              Label("Hello")
                  .WithContentAlignment(HorizontalAlignment.Trailing)
                  .WithTrailingBorder(BorderType.Thin, Color.Black),
              Label(",")
          ),
          Label("Styles!")
              .WithContentAlignment(HorizontalAlignment.Center, VerticalAlignment.Top)
              .WithTopBorder(BorderType.Thin, Color.Black)
              .WithRowHeight(20)
      ).WithBottomBorder(BorderType.Thin, Color.Black).WithTrailingBorder(BorderType.Thin, Color.Black);
  
  var renderer = new ClosedXmlComponentRenderer();
  var renderCommand = new ClosedXmlRenderCommand(worksheet, helloComponent);
  
  await renderer.RenderAsync(renderCommand);
  
  workbook.SaveAs("sample.xlsx");
  

• Google Sheets output via "Google Sheets API v4" library. (You will need to reference a FluentSpreadsheets.GoogleSheets NuGet package)

  var credential = GoogleCredential.FromFile("credentials.json");
  
  var initializer = new BaseClientService.Initializer
  {
    HttpClientInitializer = credential
  };
  
  var service = new SheetsService(initializer);
  var renderer = new GoogleSheetComponentRenderer(service);
  
  var helloComponent =
      VStack
      (
          HStack
          (
              Label("Hello")
                  .WithContentAlignment(HorizontalAlignment.Trailing)
                  .WithTrailingBorder(BorderType.Thin, Color.Black),
              Label(",")
          ),
          Label("Styles!")
              .WithContentAlignment(HorizontalAlignment.Center, VerticalAlignment.Top)
              .WithTopBorder(BorderType.Thin, Color.Black)
              .WithRowHeight(20)
      ).WithBottomBorder(BorderType.Thin, Color.Black).WithTrailingBorder(BorderType.Thin, Color.Black);
  
  const string spreadsheetId = "SampleSpreadsheetId";
  const string title = "SampleTitle";
  
  var renderCommandFactory = new RenderCommandFactory(service);
  var renderCommand = await renderCommandFactory.CreateAsync(spreadsheetId, title, helloComponent);
  
  await renderer.RenderAsync(renderCommand);
  

Sheets API

There are two main kinds of sheet segments:

• A segment that consists of a single data column:
  • SegmentBase
    Headers, rows, footer
  • RowSegmentBase
    Rows
  • HeaderRowSegmentBase
    Header, rows
• A segment that can represent a collection of data columns:
  • PrototypeSegmentBase
    Headers, rows, footer
  • PrototypeHeaderRowSegmentBase
    Headers, rows

PrototypeSegmentBase

Prototype sheet segments are useful when your table may have a dynamic amount of columns depending on the data that has been provided.

Prototype segment must have a collection of header data to create multiple segments, so you must implement IEnumerable<TSourceHeaderData> SelectHeaderData(THeaderData data) method to extract collection of header data that prototypes will use from general header data.

You also can implement IPrototypeSegmentHeaderCustomizer<TData> and customize header component (all header components in an HStack), all changes allowed, except ones that will increase header's width.

SheetBuilder

The type SheetBuilder that conforms to ISheetBuilder interface is used to build a sheet from collection of sheet segments and corresponding sheet data.

public interface ISheetBuilder
{
    IComponent Build<TRowData>(
        IReadOnlyCollection<ISheetSegment> builders,
        IReadOnlyCollection<TRowData> rowData);

    IComponent Build<THeaderData, TRowData>(
        IReadOnlyCollection<ISheetSegment> builders,
        THeaderData headerData,
        IReadOnlyCollection<TRowData> rowData);

    IComponent Build<THeaderData, TRowData, TFooterData>(
        IReadOnlyCollection<ISheetSegment> segments,
        THeaderData headerData,
        IReadOnlyCollection<TRowData> rowData,
        TFooterData footerData);
}

Each .Build method returns a component which is a rectangle that represents table built from given data.