Creating Excel document with OpenXml sdk 2.0

Question

I have created an Excel document using OpenXml SDK 2.0, now I have to style It, but I can`t.

I don't know how to paint the background color or change the font size in different cells.

My code to create a cell is:

private static Cell CreateTextCell(string header, string text, UInt32Value index)
{
    Cell c = new Cell();
    c.DataType = CellValues.InlineString;
    c.CellReference = header + index;
    InlineString inlineString = new InlineString();
    DocumentFormat.OpenXml.Spreadsheet.Text t = new DocumentFormat.OpenXml.Spreadsheet.Text();
    t.Text = text;
    inlineString.AppendChild(t);
    c.AppendChild(inlineString);
    return c;
}

Thanks for your help and sorry by my poor English.

Answer 1

SpreadsheetGear for .NET will do it and provides APIs which are similar to the Excel APIs:

    void HelloWorld()
    {
        // Create a new empty workbook and get a reference to Sheet1!A1
        SpreadsheetGear.IWorkbook workbook = SpreadsheetGear.Factory.GetWorkbook();
        IRange a1 = workbook.Worksheets["Sheet1"].Cells["A1"];
        // Assign some text to A1 and format it.
        a1.Value = "Hello World";
        a1.Font.Size = 24.0;
        a1.Interior.Color = System.Drawing.Color.Blue;
        // Automatically set the column width to fit the text.
        a1.Columns.AutoFit();
        // Save as Open XML.
        workbook.SaveAs(@"c:\HelloWorld.xlsx", FileFormat.OpenXMLWorkbook);
    }

You can download a free trial here if you want to give it a try.

Disclaimer: I own SpreadsheetGear LLC

Answer 2

Note: OpenXML 2.0 SDK is currently in CTP and is not licensed for production use until Office2010.

My general methodoloy to deal with OpenXML SDK is to create a blank document and a document with just the features you'd like to learn how to implement (like background color) and use the SDK's OpenXmlDiff to see what changes need to be made to implement the feature.

If you are creating a document from scratch, you can use DocumentReflector to generate the code for the default Stylesheet object and then add the styles you need.

Starting with the default:

new Stylesheet(
new Fonts(
    new Font(
        new FontSize() { Val = 10D },
        new Color() { Theme = (UInt32Value)1U },
        new FontName() { Val = "Arial" },
        new FontFamilyNumbering() { Val = 2 })
) { Count = (UInt32Value)1U },
new Fills(
    new Fill(
        new PatternFill() { PatternType = PatternValues.None }),
    new Fill(
        new PatternFill() { PatternType = PatternValues.Gray125 })
) { Count = (UInt32Value)2U },
new Borders(...
...
...
new CellFormats(
new CellFormat() { NumberFormatId = (UInt32Value)0U, FontId = (UInt32Value)0U, FillId = (UInt32Value)0U, BorderId = (UInt32Value)0U, FormatId = (UInt32Value)0U }) { Count = (UInt32Value)1U }, ...

I've added a new Font of size 12 and a new Fill with red background (Indexed value 64), and added new CellFormats that reference the index of the new Font and Fill. (Make sure to update the Counts too)

new Stylesheet(
    new Fonts(
        new Font(
            new FontSize() { Val = 10D },
            new Color() { Theme = (UInt32Value)1U },
            new FontName() { Val = "Arial" },
            new FontFamilyNumbering() { Val = 2 }),
        new Font(
            new FontSize() { Val = 12D },
            new Color() { Theme = (UInt32Value)1U },
            new FontName() { Val = "Arial" },
            new FontFamilyNumbering() { Val = 2 })
            ) { Count = (UInt32Value)2U },
    new Fills(
        new Fill(
            new PatternFill() { PatternType = PatternValues.None }),
        new Fill(
            new PatternFill() { PatternType = PatternValues.Gray125 }),
        new Fill(
            new PatternFill() { PatternType = PatternValues.Solid, ForegroundColor = new ForegroundColor() { Rgb = "FFFF0000" }, BackgroundColor = new BackgroundColor() { Indexed = 64 } })
            ) { Count = (UInt32Value)3U },
    new Borders(
        new Border(
            new LeftBorder(), new RightBorder(), new TopBorder(), new BottomBorder(), new DiagonalBorder())
    ) { Count = (UInt32Value)1U },
    new CellStyleFormats(
        new CellFormat() { NumberFormatId = (UInt32Value)0U, FontId = (UInt32Value)0U, FillId = (UInt32Value)0U, BorderId = (UInt32Value)0U }
    ) { Count = (UInt32Value)1U },
    new CellFormats(
        new CellFormat() { NumberFormatId = (UInt32Value)0U, FontId = (UInt32Value)0U, FillId = (UInt32Value)0U, BorderId = (UInt32Value)0U, FormatId = (UInt32Value)0U },
        new CellFormat() { NumberFormatId = (UInt32Value)0U, FontId = (UInt32Value)1U, FillId = (UInt32Value)0U, BorderId = (UInt32Value)0U, FormatId = (UInt32Value)0U },
        new CellFormat() { NumberFormatId = (UInt32Value)0U, FontId = (UInt32Value)0U, FillId = (UInt32Value)2U, BorderId = (UInt32Value)0U, FormatId = (UInt32Value)0U }
    ) { Count = (UInt32Value)3U },
    new CellStyles(
        new CellStyle() { Name = "Normal", FormatId = (UInt32Value)0U, BuiltinId = (UInt32Value)0U }
    ) { Count = (UInt32Value)1U },
    new DifferentialFormats() { Count = (UInt32Value)0U },
    new TableStyles() { Count = (UInt32Value)0U, DefaultTableStyle = "TableStyleMedium9", DefaultPivotStyle = "PivotStyleLight16" });

Then, in code, I apply the CellStyle index to the cells I want to format: (There was already data in cells A2 and A3. Cell A2 gets the larger size, A3 gets red background)

SheetData sheetData = worksheetPart.Worksheet.GetFirstChild<SheetData>();
sheetData.Descendants<Row>().Where(r => r.RowIndex == 2U).First().Descendants<Cell>().First().StyleIndex = 1U;
sheetData.Descendants<Row>().Where(r => r.RowIndex == 3U).First().Descendants<Cell>().First().StyleIndex = 2U;

Answer 3

How to specify a cell style?

new Cell() { CellReference = "B6", StyleIndex = 11U }

Here "11U" is a zero-based index of StylesPart.Stylesheet.CellFormats, in which each CellFormat defines a combination of NumberFormat, Font, Fill and Border styles.

You do not have to add all the styles by program, instead you can create a template xlsx file with all the formats you need in it, and then specify the style index in your program.