How to set cells' background?

问题

How to set the background of several cells within a row (or of a whole row) in OpenXml?

Having read several articles:

Coloring cells in excel sheet using openXML in C#
Advanced styling in Excel Open XML

I still cannot make it work.

My task is actually at first glance seems to be somewhat easier and a little bit different from what is written in those articles. The mentioned tutorials predominantly show how to create a new document and style it. While I need to change the styling of the existing one.

That is, I have an existing xlsx document (a report template). I populate the report with the necessary values (managed to do it thanks to SO open xml excel read cell value and MSDN Working with sheets (Open XML SDK)). But next I need to mark several rows with, say, red background.

I am neither sure whether to use CellStyle nor if I should use CellFormat or something else...This is what I have got up to now:

SpreadsheetDocument doc = SpreadsheetDocument.Open("ole.xlsx", true);

Sheet sheet = (Sheet)doc.WorkbookPart
                        .Workbook
                        .Sheets
                        .FirstOrDefault();

WorksheetPart worksheetPart = (WorksheetPart)doc.WorkbookPart
                                                .GetPartById(sheet.Id);
Worksheet worksheet = worksheetPart.Worksheet;


CellStyle cs = new CellStyle();
cs.Name = StringValue.FromString("Normal");
cs.FormatId = 0;
cs.BuiltinId = 0;
//where are the style values?

WorkbookStylesPart wbsp = doc.WorkbookPart
                                .GetPartsOfType<WorkbookStylesPart>()
                                .FirstOrDefault();
wbsp.Stylesheet.CellStyles.Append(cs);
wbsp.Stylesheet.Save();



Cell cell = GetCell(worksheet, "A", 20);
cell.StyleIndex = 1U;//get the new cellstyle index somehow

doc.Close();

Actually I would greatly appreciate a more light-weight and easy example of how to style, say, cell A20 or range from A20 to J20. Or probably a link to some more consecutive tutorial.

回答1:

In the end I changed my mind to use cell background and used fonts. Thanks to answer by foson in SO Creating Excel document with OpenXml sdk 2.0 I managed to add a new Font and a new CellFormat, having preserved the original cell's formatting (i.e. having changed the font color only):

SpreadsheetDocument doc = SpreadsheetDocument.Open("1.xlsx", true);
Sheet sheet = (Sheet)doc.WorkbookPart.Workbook.Sheets.FirstOrDefault();
WorksheetPart worksheetPart = (WorksheetPart)doc.WorkbookPart
                                                .GetPartById(sheet.Id);
Worksheet worksheet = worksheetPart.Worksheet;

WorkbookStylesPart styles = doc.WorkbookPart.WorkbookStylesPart;
Stylesheet stylesheet = styles.Stylesheet;
CellFormats cellformats = stylesheet.CellFormats;
Fonts fonts = stylesheet.Fonts;

UInt32 fontIndex = fonts.Count;
UInt32 formatIndex = cellformats.Count;

Cell cell = GetCell(worksheet, "A", 19);
cell.CellValue = new CellValue(DateTime.Now.ToLongTimeString());
cell.DataType = new EnumValue<CellValues>(CellValues.String);

CellFormat f = (CellFormat)cellformats.ElementAt((int)cell.StyleIndex.Value);

var font = (Font)fonts.ElementAt((int)f.FontId.Value);
var newfont = (Font)font.Clone();
newfont.Color = new Color() { Rgb = new HexBinaryValue("ff0000") };
fonts.Append(newfont);

CellFormat newformat = (CellFormat)f.Clone();
newformat.FontId = fontIndex;
cellformats.Append(newformat);

stylesheet.Save();

cell.StyleIndex = formatIndex;
doc.Close();

来源：https://stackoverflow.com/questions/14051642/how-to-set-cells-background

标签

excel

openxml