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Help with Epplus function

Jun 23, 2011 at 5:20 AM


Using the below example, I am trying to have:

A method that creates the excel document/writes the header fields (row 1)     createWorkBook()

A method that writes the data cell by cell                                                      writeCells()

A method that closes the document and saves it                                           closeWorkBook()

I have the code below tweaked and almost except I'm not sure what this part does besides break my method :) . I can only add the worksheet once (when I create it), but need to have it defined as an existing workbook for the writeCells() and closeWorkBook() methods.

" var ws = package.Workbook.Worksheets.Add("Performance Test"); "

Does anyone have an examples, something like ...

public static createWorkBook(string directory, string fileName, int row, int column, string[] excelHeaders)


public static writeCells(int row, int column, string[] data)

public static closeWorkBook(string directory, string fileName, string password)


Thanks for reading!

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using OfficeOpenXml;
using OfficeOpenXml.Style;
using System.Drawing;
namespace EPPlusSamples
class Sample7
/// <summary>
/// This sample load a number of rows, style them and insert a row at the top.
/// A password is set to protect locked cells. Column 3 & 4 will be editable, the rest will be locked.
/// </summary>
/// <param name="outputDir"></param>
/// <param name="Rows"></param>
public static string RunSample7(DirectoryInfo outputDir, int Rows)
FileInfo newFile = new FileInfo(outputDir.FullName + @"\sample7.xlsx");
if (newFile.Exists)
newFile.Delete(); // ensures we create a new workbook
newFile = new FileInfo(outputDir.FullName + @"\sample7.xlsx");

ExcelPackage package = new ExcelPackage();
Console.WriteLine("{}\tStarting...", DateTime.Now);

//Load the sheet with one string column, one date column and a few random numbers.
var ws = package.Workbook.Worksheets.Add("Performance Test");

//Format all cells
ExcelRange cols = ws.Cells["A:XFD"];
cols.Style.Fill.PatternType = ExcelFillStyle.Solid;

var rnd = new Random();
for (int row = 1; row <= Rows; row++)
ws.SetValue(row, 1, row); //The SetValue method is a little bit faster than using the Value property
ws.SetValue(row, 2, string.Format("Row {0}", row));
ws.SetValue(row, 3, DateTime.Today.AddDays(row));
ws.SetValue(row, 4, rnd.NextDouble() * 10000);

ws.Cells[row, 5].FormulaR1C1 = "RC[-4]+RC[-1]";

if (row % 10000 == 0)
Console.WriteLine("{}\tWriting row {1}...", DateTime.Now, row);
//Add a sum at the end
ws.Cells[Rows + 1, 5].Formula = string.Format("Sum({0})", new ExcelAddress(1, 5, Rows, 5).Address);
ws.Cells[Rows + 1, 5].Style.Font.Bold = true;
ws.Cells[Rows + 1, 5].Style.Numberformat.Format = "#,##0.00";

Console.WriteLine("{}\tWriting row {1}...", DateTime.Now, Rows);
Console.WriteLine("{}\tFormating...", DateTime.Now);
//Format the date and numeric columns
ws.Cells[1, 1, Rows, 1].Style.Numberformat.Format = "#,##0";
ws.Cells[1, 3, Rows, 3].Style.Numberformat.Format = "YYYY-MM-DD";
ws.Cells[1, 4, Rows, 5].Style.Numberformat.Format = "#,##0.00";

Console.WriteLine("{}\tInsert a row at the top...", DateTime.Now);
//Insert a row at the top. Note that the formula-addresses are shifted down
ws.InsertRow(1, 1);

//Write the headers and style them
ws.Cells["A1"].Value = "Index";
ws.Cells["B1"].Value = "Text";
ws.Cells["C1"].Value = "Date";
ws.Cells["D1"].Value = "Number";
ws.Cells["E1"].Value = "Formula";
ws.View.FreezePanes(2, 1);

using(var rng = ws.Cells["A1:E1"])
rng.Style.Font.Bold = true;
rng.Style.WrapText = true;
rng.Style.VerticalAlignment = ExcelVerticalAlignment.Center;
rng.Style.HorizontalAlignment = ExcelHorizontalAlignment.Center;
rng.Style.Fill.PatternType = ExcelFillStyle.Solid;

ws.Cells[Rows-100, 1, Rows, 5].AutoFitColumns(5); //Auto fit using the last 100 rows with minimum width 5
ws.Column(5).Width = 15; //We need to set the width for column F manually since the end sum formula is the widest cell in the column (EPPlus don't calculate any forumlas, so no output text is avalible).

//Now we set the sheetprotection and a password.
ws.Cells[2, 3, Rows + 1, 4].Style.Locked = false;
ws.Cells[2, 3, Rows + 1, 4].Style.Fill.PatternType = ExcelFillStyle.Solid;
ws.Cells[2, 3, Rows + 1, 4].Style.Fill.BackgroundColor.SetColor(Color.White);
ws.Cells[1, 5, Rows + 2, 5].Style.Hidden = true; //Hide the formula


Console.WriteLine("{}\tSaving...", DateTime.Now);
Console.WriteLine("{}\tDone!!", DateTime.Now);
return newFile.FullName;

Jun 4, 2013 at 2:41 PM
I think you are looking for something like this: I downloaded the source code and it has the very examples you are looking for.