Skip to content

Instantly share code, notes, and snippets.

@kzelda
Forked from ram-sagar-mourya/ReadWriteExcel.cs
Last active March 26, 2024 10:27
Show Gist options
  • Save kzelda/2facdff2d924349fe96c37eab0e9ee47 to your computer and use it in GitHub Desktop.
Save kzelda/2facdff2d924349fe96c37eab0e9ee47 to your computer and use it in GitHub Desktop.
Read and Write Excel using open xml in c#
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ReadWriteExcelUsingOpenXml.Shared
{
public class Helper
{
public static DataTable ReadExcelSheet(string fname, bool firstRowIsHeader = true)
{
List<string> Headers = new List<string>();
DataTable dt = new DataTable();
using (SpreadsheetDocument doc = SpreadsheetDocument.Open(fname, false))
{
//Read the first Sheets
Sheet sheet = doc.WorkbookPart.Workbook.Sheets.GetFirstChild<Sheet>();
Worksheet worksheet = (doc.WorkbookPart.GetPartById(sheet.Id.Value) as WorksheetPart).Worksheet;
IEnumerable<Row> rows = worksheet.GetFirstChild<SheetData>().Descendants<Row>();
int counter = 0;
foreach (Row row in rows)
{
counter = counter + 1;
//Read the first row as header
if (counter == 1)
{
var j = 1;
foreach (Cell cell in row.Descendants<Cell>())
{
var colunmName = firstRowIsHeader ? GetCellValue(doc, cell) : "Field" + j++;
Console.WriteLine(colunmName);
Headers.Add(colunmName);
dt.Columns.Add(colunmName);
}
}
else
{
dt.Rows.Add();
int i = 0;
foreach (Cell cell in row.Descendants<Cell>())
{
dt.Rows[dt.Rows.Count - 1][i] = GetCellValue(doc, cell);
i++;
}
}
}
}
return dt;
}
public static void CreateExcelFile(DataTable table, string destination)
{
var ds = new DataSet();
ds.Tables.Add(table);
ExportDSToExcel(ds, destination);
}
private static string GetCellValue(SpreadsheetDocument doc, Cell cell)
{
string value = cell.CellValue.InnerText;
if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
{
return doc.WorkbookPart.SharedStringTablePart.SharedStringTable.ChildElements.GetItem(int.Parse(value)).InnerText;
}
return value;
}
public static void ExportDSToExcel(DataSet ds, string destination)
{
// https://stackoverflow.com/questions/11811143/export-datatable-to-excel-with-open-xml-sdk-in-c-sharp
using (var workbook = SpreadsheetDocument.Create(destination, DocumentFormat.OpenXml.SpreadsheetDocumentType.Workbook))
{
var workbookPart = workbook.AddWorkbookPart();
workbook.WorkbookPart.Workbook = new DocumentFormat.OpenXml.Spreadsheet.Workbook();
workbook.WorkbookPart.Workbook.Sheets = new DocumentFormat.OpenXml.Spreadsheet.Sheets();
uint sheetId = 1;
foreach (DataTable table in ds.Tables)
{
var sheetPart = workbook.WorkbookPart.AddNewPart<WorksheetPart>();
var sheetData = new DocumentFormat.OpenXml.Spreadsheet.SheetData();
sheetPart.Worksheet = new DocumentFormat.OpenXml.Spreadsheet.Worksheet(sheetData);
DocumentFormat.OpenXml.Spreadsheet.Sheets sheets = workbook.WorkbookPart.Workbook.GetFirstChild<DocumentFormat.OpenXml.Spreadsheet.Sheets>();
string relationshipId = workbook.WorkbookPart.GetIdOfPart(sheetPart);
if (sheets.Elements<DocumentFormat.OpenXml.Spreadsheet.Sheet>().Count() > 0)
{
sheetId =
sheets.Elements<DocumentFormat.OpenXml.Spreadsheet.Sheet>().Select(s => s.SheetId.Value).Max() + 1;
}
DocumentFormat.OpenXml.Spreadsheet.Sheet sheet = new DocumentFormat.OpenXml.Spreadsheet.Sheet() { Id = relationshipId, SheetId = sheetId, Name = table.TableName };
sheets.Append(sheet);
DocumentFormat.OpenXml.Spreadsheet.Row headerRow = new DocumentFormat.OpenXml.Spreadsheet.Row();
List<String> columns = new List<string>();
foreach (DataColumn column in table.Columns)
{
columns.Add(column.ColumnName);
DocumentFormat.OpenXml.Spreadsheet.Cell cell = new DocumentFormat.OpenXml.Spreadsheet.Cell();
cell.DataType = DocumentFormat.OpenXml.Spreadsheet.CellValues.String;
cell.CellValue = new DocumentFormat.OpenXml.Spreadsheet.CellValue(column.ColumnName);
headerRow.AppendChild(cell);
}
sheetData.AppendChild(headerRow);
foreach (DataRow dsrow in table.Rows)
{
DocumentFormat.OpenXml.Spreadsheet.Row newRow = new DocumentFormat.OpenXml.Spreadsheet.Row();
foreach (String col in columns)
{
DocumentFormat.OpenXml.Spreadsheet.Cell cell = new DocumentFormat.OpenXml.Spreadsheet.Cell();
cell.DataType = DocumentFormat.OpenXml.Spreadsheet.CellValues.String;
cell.CellValue = new DocumentFormat.OpenXml.Spreadsheet.CellValue(dsrow[col].ToString()); //
newRow.AppendChild(cell);
}
sheetData.AppendChild(newRow);
}
}
}
}
}
}
@mahipalsingh-capsitech
Copy link

Hello, kzelda i want to get empty cell in spreadsheet. please help me.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment