Open XML Excel Cell Formatting - cell

Question

I am trying to export to excel using Open XML with simple formatting. Export to Excel is working. The problem is with formatting the data. I am trying to have very basic formatting. i.e. the Column names should be in bold and rest of the content in normal font. This is what I did. Please let me know where am I going wrong.
private Stylesheet GenerateStyleSheet()
{
return new Stylesheet(
new Fonts(
new Font(new DocumentFormat.OpenXml.Spreadsheet.FontSize { Val = 12},
new Bold(),
new Font(new DocumentFormat.OpenXml.Spreadsheet.FontSize { Val = 12}))
)
);
}
protected void ExportExcel(DataTable dtExport)
{
Response.ClearHeaders();
Response.ClearContent();
Response.Clear();
Response.Buffer = true;
Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet.main+xml";
//"application/vnd.openxmlformats-officedocument.spreadsheetml.worksheet+xml" '"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" '"application/vnd.ms-excel"
Response.AddHeader("content-disposition", "attachment; filename=Test.xlsx");
Response.Charset = "";
this.EnableViewState = false;
MemoryStream ms = new MemoryStream();
SpreadsheetDocument objSpreadsheet = SpreadsheetDocument.Create(ms, SpreadsheetDocumentType.Workbook);
WorkbookPart objWorkbookPart = objSpreadsheet.AddWorkbookPart();
objWorkbookPart.Workbook = new Workbook();
WorksheetPart objSheetPart = objWorkbookPart.AddNewPart<WorksheetPart>();
objSheetPart.Worksheet = new Worksheet(new SheetData());
Sheets objSheets = objSpreadsheet.WorkbookPart.Workbook.AppendChild<Sheets>(new Sheets());
Sheet objSheet = new Sheet();
objSheet.Id = objSpreadsheet.WorkbookPart.GetIdOfPart(objSheetPart);
objSheet.SheetId = 1;
objSheet.Name = "mySheet";
objSheets.Append(objSheet);
WorkbookStylesPart stylesPart = objSpreadsheet.WorkbookPart.AddNewPart<WorkbookStylesPart>();
stylesPart.Stylesheet = GenerateStyleSheet();
stylesPart.Stylesheet.Save();
objSheetPart.Worksheet.Save();
objSpreadsheet.WorkbookPart.Workbook.Save();
for (int cols = 0; cols < dtExport.Columns.Count; cols++)
{
Cell objCell = InsertCellInWorksheet(GetColumnName(cols), 1, objSheetPart);
objCell.CellValue = new CellValue(dtExport.Columns[cols].ColumnName);
objCell.DataType = new EnumValue<CellValues>(CellValues.String);
objCell.StyleIndex = 0;
}
objSheetPart.Worksheet.Save();
objSpreadsheet.WorkbookPart.Workbook.Save();
for (uint row = 0; row < dtExport.Rows.Count; row++)
{
for (int cols = 0; cols < dtExport.Columns.Count; cols++)
{
//row + 2 as we need to start adding data from second row. First row is left for header
Cell objCell = InsertCellInWorksheet(GetColumnName(cols), row + 2, objSheetPart);
objCell.CellValue = new CellValue(Convert.ToString(dtExport.Rows[Convert.ToInt32(row)][cols]));
objCell.DataType = new EnumValue<CellValues>(CellValues.String);
objCell.StyleIndex = 1;
}
}
objSheetPart.Worksheet.Save();
objSpreadsheet.WorkbookPart.Workbook.Save();
objSpreadsheet.Close();
ms.WriteTo(Response.OutputStream);
Response.Flush();
Response.End();
}
// Given a column name, a row index, and a WorksheetPart, inserts a cell into the worksheet.
// If the cell already exists, return it.
private Cell InsertCellInWorksheet(string columnName, uint rowIndex, WorksheetPart worksheetPart)
{
Worksheet worksheet = worksheetPart.Worksheet;
SheetData sheetData = worksheet.GetFirstChild<SheetData>();
string cellReference = (columnName + rowIndex.ToString());
// If the worksheet does not contain a row with the specified row index, insert one.
Row row = default(Row);
if ((sheetData.Elements<Row>().Where(r => r.RowIndex.Value == rowIndex).Count() != 0))
{
row = sheetData.Elements<Row>().Where(r => r.RowIndex.Value == rowIndex).First();
}
else
{
row = new Row();
row.RowIndex = rowIndex;
sheetData.Append(row);
}
// If there is not a cell with the specified column name, insert one.
if ((row.Elements<Cell>().Where(c => c.CellReference.Value == columnName + rowIndex.ToString()).Count() > 0))
{
return row.Elements<Cell>().Where(c => c.CellReference.Value == cellReference).First();
}
else
{
// Cells must be in sequential order according to CellReference. Determine where to insert the new cell.
Cell refCell = null;
foreach (Cell cell in row.Elements<Cell>())
{
if ((string.Compare(cell.CellReference.Value, cellReference, true) > 0))
{
refCell = cell;
break; // TODO: might not be correct. Was : Exit For
}
}
Cell newCell = new Cell();
newCell.CellReference = cellReference;
row.InsertBefore(newCell, refCell);
return newCell;
}
}

Answer 1

It seems like you are missing a ")" after your first font creation. So then you end opp with only one font index (the default one)
Below is the code I use for exactly what you are asking for.
You might remove fills and borders and remove them from cellformat, but I had some syntax problems while writing this so I just left it when it all worked :-)
private Stylesheet GenerateStyleSheet()
{
return new Stylesheet(
new Fonts(
// Index 0 - Default font.
new Font(
new FontSize() { Val = 11 },
new Color() { Rgb = new HexBinaryValue() { Value = "000000" } }
),
new Font(
new Bold(),
new FontSize() { Val = 11 },
new Color() { Rgb = new HexBinaryValue() { Value = "000000" } }
)
),
new Fills(
// Index 0 - Default fill.
new Fill(
new PatternFill() { PatternType = PatternValues.None })
),
new Borders(
// Index 0 - Default border.
new Border(
new LeftBorder(),
new RightBorder(),
new TopBorder(),
new BottomBorder(),
new DiagonalBorder())
),
new CellFormats(
// Index 0 - Default cell style
new CellFormat() { FontId = 0, FillId = 0, BorderId = 0 },
new CellFormat() { FontId = 1, FillId = 0, BorderId = 0, ApplyFont = true }
)
);
}