The code which I posted in the answer can be used practically without any modification in any ASP.NET code which are written in C#. The helper class DataForExcel (see the file DataForExcel.cs) has constructor
public DataForExcel(string[] headers, List<string[]> data, string sheetName)
or a little more “advanced” version
public DataForExcel(string[] headers, DataType[] colunmTypes,
List<string[]> data, string sheetName)
which allow to specify which columns have numeric datatype. The parameter List<string[]> data is the data which need be exported to Excel. The parameter string[] headers specify the data for the first line of the output.
The class DataForExcel has only one public method
public void CreateXlsxAndFillData(Stream stream)
which fill stream with the binary representation of resulting .XLSX Excel file.
To return the binary data from your ASP.NET method (for example ASHX handler) you need just do almost the same what do ExecuteResult from my answer:
- create memory stream with
using (var stream = new MemoryStream()) {...} - create
DataForExcelobject needed for export to Excelvar dataExcel = new DataForExcel (new []{"Id", "Votes", "Title"}, "Questions.xlsx", "Name or Sheet"); response.AddHeader ("content-disposition", "attachment; filename=Questions.xlsx");response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";response.ContentEncoding = Encoding.UTF8;stream.WriteTo (response.OutputStream);response.Flush();
It’s all.
UPDATED: I modified the code which I posted before to create in very easy way the Excel file (in .xlsx format) from the grid. If you use OpenXML SDK 2.0 then you can use .NET 3.5. OpenXML SDK 2.5 required .NET 4.0 or higher.
The suggested code allows to convert string[][] of data to binary Excel data and write the results in Stream. You can use MemoryStream like I described before to return Excel from any ASP.NET application.
The suggested code contain ExportToExcel static class with one public static method FillSpreadsheetDocument which can be used in the following way
var data = new[] {
new [] {"Tom", "30", "x", "", "1974-06-16"},
new [] {"Margarita", "34", "x", "x", "1978-10-02"},
new [] {"Bob", "7", "", "", "2005-06-26"},
new [] {"Oleg", "48", "x", "x", "1964-09-11"},
new [] {"Frank", "29", "", "x", "1983-01-28"}
};
using (var stream = new FileStream("Test.xlsx", FileMode.Create)) {
ExportToExcel.FillSpreadsheetDocument(stream,
new[] {
new ColumnModel { Type = DataType.String, Alignment = HorizontalAlignment.Left, Header = "Name" },
new ColumnModel { Type = DataType.Integer, Header = "Age" },
new ColumnModel { Type = DataType.String, Header = "Is Married", Alignment = HorizontalAlignment.Center, IsRotatedHeader = true },
new ColumnModel { Type = DataType.String, Header = "Has Children", Alignment = HorizontalAlignment.Center, IsRotatedHeader = true },
new ColumnModel { Type = DataType.Date, Header = "Birthday", Alignment = HorizontalAlignment.Left }
},
data,
"Friends");
}
It produces the "Test.xlsx" with one sheet “Friends” which looks
The width of the columns will be not set, but in two clicks (select all and double click on between columns) one the user can set the width of columns to optimal width like on the build above. All cells has formatted data (no “Generic” format). I used integer, date and pure strings. One can easy create columns with center alignment or right alignment texts.
You can easy modify the code so that more different text formats will be used. It’s just an example how to produce real Excel document with formatted cells.
The working Visual Studio 2008 Project you can download from here. Below you will find the source code from the demo:
using System;
using System.Collections.Generic;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System.Text;
using System.IO;
using System.Globalization;
namespace ExportToExcel {
public enum ExcelCellDataType {
String,
Integer,
Date
}
public enum HorizontalAlignment {
Left,
Center,
Right
}
public class ColumnModel {
public ExcelCellDataType Type { set; get; }
public HorizontalAlignment Alignment { set; get; }
public string Header { set; get; }
public bool IsRotatedHeader { set; get; }
}
public enum OutputCellFormat: uint {
Text,
Integer,
Date,
TextHeader,
TextHeaderRotated,
TextCenter,
TextRight
}
public static class ExportToExcel {
private static StringBuilder ConvertIntToColumnHeader (uint iCol) {
var sb = new StringBuilder();
while (iCol > 0) {
if (iCol <= 'Z' - 'A') // iCol=0 -> 'A', 25 -> 'Z'
break;
sb.Append(ConvertIntToColumnHeader(iCol / ('Z' - 'A' + 1) - 1));
iCol = iCol % ('Z' - 'A' + 1);
}
sb.Append((char)('A' + iCol));
return sb;
}
private static string GetCellReference (uint iRow, uint iCol) {
return ConvertIntToColumnHeader(iCol).Append(iRow).ToString();
}
private static Row CreateColumnHeaderRow (uint iRow, IList<ColumnModel> colunmModels) {
var r = new Row { RowIndex = iRow };
for (var iCol = 0; iCol < colunmModels.Count; iCol++) {
var styleIndex = colunmModels[iCol].IsRotatedHeader
? (UInt32Value)(uint)(OutputCellFormat.TextHeaderRotated + 1)
: (UInt32Value)(uint)(OutputCellFormat.TextHeader + 1);
r.Append(new OpenXmlElement[] {
// create Cell with InlineString as a child, which has Text as a child
new Cell(new InlineString(new Text { Text = colunmModels[iCol].Header })) {
DataType = CellValues.InlineString,
StyleIndex = styleIndex,
CellReference = GetCellReference(iRow, (uint)iCol)
}
});
}
return r;
}
private static UInt32Value GetStyleIndexFromColumnModel (ColumnModel colunmModel) {
switch (colunmModel.Type) {
case ExcelCellDataType.Integer:
return (uint)(OutputCellFormat.Integer) + 1;
case ExcelCellDataType.Date:
return (uint)(OutputCellFormat.Date) + 1;
}
switch (colunmModel.Alignment) {
case HorizontalAlignment.Center:
return (uint)(OutputCellFormat.TextCenter) + 1;
case HorizontalAlignment.Right:
return (uint)(OutputCellFormat.TextRight) + 1;
default:
return (uint)(OutputCellFormat.Text) + 1;
}
}
private static string ConvertDateToString (string date) {
DateTime dt;
string text = date; // default results of conversion
if (DateTime.TryParse(date, out dt))
text = dt.ToOADate().ToString(CultureInfo.InvariantCulture);
return text;
}
private static Row CreateRow (UInt32 iRow, IList<string> data, IList<ColumnModel> colunmModels, IDictionary<string, int> sharedStrings) {
var r = new Row { RowIndex = iRow };
for (var iCol = 0; iCol < data.Count; iCol++) {
var styleIndex = (uint)(OutputCellFormat.Text) + 1;
string text = data[iCol] ?? String.Empty;
if (colunmModels != null && iCol < colunmModels.Count) {
styleIndex = GetStyleIndexFromColumnModel(colunmModels[iCol]);
switch (colunmModels[iCol].Type) {
case ExcelCellDataType.Integer:
r.Append(new OpenXmlElement[] {
// create Cell with CellValue as a child, which has Text as a child
new Cell(new CellValue { Text = text }) {
StyleIndex = styleIndex,
CellReference = GetCellReference(iRow, (uint)iCol)
}
});
continue;
case ExcelCellDataType.Date:
r.Append(new OpenXmlElement[] {
// create Cell with CellValue as a child, which has Text as a child
new Cell(new CellValue { Text = ConvertDateToString(text) }) {
StyleIndex = styleIndex,
CellReference = GetCellReference(iRow, (uint)iCol)
}
});
continue;
}
}
// default format is text
if (String.IsNullOrEmpty(text) || !sharedStrings.ContainsKey(text)) {
// create Cell with InlineString as a child, which has Text as a child
r.Append(new OpenXmlElement[] {
new Cell(new InlineString(new Text { Text = text })) {
DataType = CellValues.InlineString,
StyleIndex = styleIndex,
CellReference = GetCellReference(iRow, (uint)iCol)
}
});
} else {
r.Append(new OpenXmlElement[] {
// create Cell with CellValue as a child, which has Text as a child
new Cell(new CellValue { Text = sharedStrings[text].ToString(CultureInfo.InvariantCulture) }) {
DataType = CellValues.SharedString,
StyleIndex = styleIndex,
CellReference = GetCellReference(iRow, (uint)iCol)
}
});
}
}
return r;
}
private static void FillSpreadsheetDocument (SpreadsheetDocument spreadsheetDocument, IList<ColumnModel> columnModels, IList<string[]> data, string sheetName) {
if (columnModels == null)
throw new ArgumentNullException("columnModels");
if (data == null)
throw new ArgumentNullException("data");
// add empty workbook and worksheet to the SpreadsheetDocument
var workbookPart = spreadsheetDocument.AddWorkbookPart();
var worksheetPart = workbookPart.AddNewPart<WorksheetPart>();
var workbookStylesPart = workbookPart.AddNewPart<WorkbookStylesPart>();
// create styles for the header and columns
workbookStylesPart.Stylesheet = new Stylesheet(
new Fonts(
// Index 0 - The default font.
new Font(
new FontSize { Val = 11 },
new Color { Rgb = new HexBinaryValue { Value = "00000000" } },
new FontName { Val = "Calibri" }
),
// Index 1 - The bold font.
new Font(
new Bold(),
new FontSize { Val = 11 },
new Color { Rgb = new HexBinaryValue { Value = "00000000" } },
new FontName { Val = "Calibri" }
)
),
new Fills(
// Index 0 - required, reserved by Excel - no pattern
new Fill(new PatternFill { PatternType = PatternValues.None }),
// Index 1 - required, reserved by Excel - fill of gray 125
new Fill(new PatternFill { PatternType = PatternValues.Gray125 }),
// Index 2 - no pattern text on gray background
new Fill(new PatternFill {
PatternType = PatternValues.Solid,
BackgroundColor = new BackgroundColor { Indexed = 64U },
ForegroundColor = new ForegroundColor { Rgb = "FFD9D9D9" }
})
),
new Borders(
// Index 0 - The default border.
new Border(
new LeftBorder(),
new RightBorder(),
new TopBorder(),
new BottomBorder(),
new DiagonalBorder()
),
// Index 1 - Applies a Left, Right, Top, Bottom border to a cell
new Border(
new LeftBorder(new Color { Auto = true }) { Style = BorderStyleValues.Thin },
new RightBorder(new Color { Auto = true }) { Style = BorderStyleValues.Thin },
new TopBorder(new Color { Auto = true }) { Style = BorderStyleValues.Thin },
new BottomBorder(new Color { Auto = true }) { Style = BorderStyleValues.Thin },
new DiagonalBorder()
)
),
new CellFormats(
// Index 0 - The default cell style. If a cell does not have a style iCol applied it will use this style combination instead
new CellFormat {
NumberFormatId = (UInt32Value)0U,
FontId = (UInt32Value)0U,
FillId = (UInt32Value)0U,
BorderId = (UInt32Value)0U
},
// Index 1 - Alignment Left, Text
new CellFormat(new Alignment { Horizontal = HorizontalAlignmentValues.Left }) {
NumberFormatId = (UInt32Value)49U, // "@" - text format - see http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.numberingformat.aspx
FontId = (UInt32Value)0U,
FillId = (UInt32Value)0U,
BorderId = (UInt32Value)1U,
ApplyNumberFormat = true,
ApplyAlignment = true
},
// Index 2 - Interger Number
new CellFormat {
NumberFormatId = (UInt32Value)1U, // "0" - integer format - see http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.numberingformat.aspx
FontId = (UInt32Value)0U,
FillId = (UInt32Value)0U,
BorderId = (UInt32Value)1U,
ApplyNumberFormat = true
},
// Index 3 - Interger Date
new CellFormat {
NumberFormatId = (UInt32Value)14U, // "14" - date format mm-dd-yy - see http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.numberingformat.aspx
FontId = (UInt32Value)0U,
FillId = (UInt32Value)0U,
BorderId = (UInt32Value)1U,
ApplyNumberFormat = true
},
// Index 4 - Text for headers
new CellFormat(new Alignment {
Vertical = VerticalAlignmentValues.Center,
Horizontal = HorizontalAlignmentValues.Center
}) {
NumberFormatId = (UInt32Value)49U, // "@" - text format - see http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.numberingformat.aspx
FontId = (UInt32Value)1U,
FillId = (UInt32Value)2U,
BorderId = (UInt32Value)1U,
ApplyNumberFormat = true,
ApplyAlignment = true
},
// Index 5 - Text for headers rotated
new CellFormat(new Alignment {
Horizontal = HorizontalAlignmentValues.Center,
TextRotation = (UInt32Value)90U
}) {
NumberFormatId = (UInt32Value)49U, // "@" - text format - see http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.numberingformat.aspx
FontId = (UInt32Value)1U,
FillId = (UInt32Value)2U,
BorderId = (UInt32Value)1U,
ApplyNumberFormat = true,
ApplyAlignment = true
},
// Index 6 - Alignment Center, Text
new CellFormat(new Alignment { Horizontal = HorizontalAlignmentValues.Center }) {
NumberFormatId = (UInt32Value)49U, // "@" - text format - see http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.numberingformat.aspx
FontId = (UInt32Value)0U,
FillId = (UInt32Value)0U,
BorderId = (UInt32Value)1U,
ApplyNumberFormat = true,
ApplyAlignment = true
},
// Index 7 - Alignment Right, Text
new CellFormat(new Alignment { Horizontal = HorizontalAlignmentValues.Right }) {
NumberFormatId = (UInt32Value)49U, // "@" - text format - see http://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.numberingformat.aspx
FontId = (UInt32Value)0U,
FillId = (UInt32Value)0U,
BorderId = (UInt32Value)1U,
ApplyNumberFormat = true,
ApplyAlignment = true
}
)
);
workbookStylesPart.Stylesheet.Save();
// create and fill SheetData
var sheetData = new SheetData();
// first row is the header
uint iRow = 1;
sheetData.AppendChild(CreateColumnHeaderRow(iRow++, columnModels));
//iRow++; // skip one row for the filter
// first of all collect all different strings
var sst = new SharedStringTable();
var sharedStrings = new SortedDictionary<string, int>();
foreach (var dataRow in data)
for (var iCol = 0; iCol < dataRow.Length; iCol++)
if (iCol >= columnModels.Count || columnModels[iCol].Type != ExcelCellDataType.Integer) {
string text = (columnModels[iCol].Type == ExcelCellDataType.Date
? dataRow[iCol]
: ConvertDateToString(dataRow[iCol])) ?? String.Empty;
if (!String.IsNullOrEmpty(text) && !sharedStrings.ContainsKey(text)) {
sst.AppendChild(new SharedStringItem(new Text(text)));
sharedStrings.Add(text, sharedStrings.Count);
}
}
var shareStringPart = workbookPart.AddNewPart<SharedStringTablePart>();
shareStringPart.SharedStringTable = sst;
shareStringPart.SharedStringTable.Save();
foreach (var dataRow in data)
sheetData.AppendChild(CreateRow(iRow++, dataRow, columnModels, sharedStrings));
// add sheet data to Worksheet
worksheetPart.Worksheet = new Worksheet(sheetData);
worksheetPart.Worksheet.Save();
// fill workbook with the Worksheet
spreadsheetDocument.WorkbookPart.Workbook = new Workbook(
new FileVersion { ApplicationName = "Microsoft Office Excel" },
new Sheets(new Sheet {
Name = sheetName,
SheetId = (UInt32Value)1U,
Id = workbookPart.GetIdOfPart(worksheetPart) // generate the id for sheet
})
);
spreadsheetDocument.WorkbookPart.Workbook.Save();
spreadsheetDocument.Close();
}
public static void FillSpreadsheetDocument (Stream stream, IList<ColumnModel> columnModels, IList<string[]> data, string sheetName) {
using (var spreadsheetDocument = SpreadsheetDocument.Create(stream, SpreadsheetDocumentType.Workbook)) {
FillSpreadsheetDocument(spreadsheetDocument, columnModels, data, sheetName);
}
}
}
class Program {
static void Main () {
var data = new[] {
new [] {"Tom", "30", "x", null, "1974-06-16"},
new [] {"Margarita", "34", "x", "x", null},
new [] {"Bob", "7", "", "", "2005-06-26"},
new [] {"Oleg", null, "x", "x", "1964-09-11"},
new [] {"Frank", "29", "", "x", "1983-01-28"}
};
using (var stream = new FileStream("Test.xlsx", FileMode.Create)) {
ExportToExcel.FillSpreadsheetDocument(stream,
new[] {
new ColumnModel { Type = ExcelCellDataType.String, Alignment = HorizontalAlignment.Left, Header = "Name" },
new ColumnModel { Type = ExcelCellDataType.Integer, Header = "Age" },
new ColumnModel { Type = ExcelCellDataType.String, Header = "Is Married", Alignment = HorizontalAlignment.Center, IsRotatedHeader = true },
new ColumnModel { Type = ExcelCellDataType.String, Header = "Has Children", Alignment = HorizontalAlignment.Center, IsRotatedHeader = true },
new ColumnModel { Type = ExcelCellDataType.Date, Header = "Birthday", Alignment = HorizontalAlignment.Left }
},
data,
"Friends");
}
}
}
}