Modify excel cell

Question

Good morning, I would like to edit some cells from already existing excell file. I tried use EPPlus and normal OpenXml classes. However I failed. In both situation program w

Answer 1

//this help you to set cells in file excel : using System.Data.OleDb;

        string connString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Directory.GetCurrentDirectory() + "/swtlist.xlsx;" +
                     @"Extended Properties='Excel 12.0;HDR=Yes;';Persist Security Info=False;";


        using (OleDbConnection connection = new OleDbConnection(connString))
        {
            connection.Open();
            try
            {

                OleDbCommand cmd = new OleDbCommand("UPDATE  [Feuil1$]  SET d='yes' ", connection);

                  cmd.ExecuteNonQuery();
                connection.Close();


            }
            catch (Exception ex) { }
        }

Answer 2

I'm using ClosedXML where updating a cell value is a no-brainer:

var workbook = new XLWorkbook("HelloWorld.xlsx"); // load the existing excel file
var worksheet = workbook.Worksheets.Worksheet(1);
worksheet.Cell("A1").SetValue("Hello World!");
workbook.Save();

The NuGet package can be found here.

Answer 3

The problem in both cases is that the modified workbook is not saved back to the stream:

MemoryStream ms = new MemoryStream();
using (FileStream fs = File.OpenRead(@"Path\Test.xlsx"))
using (ExcelPackage excelPackage = new ExcelPackage(fs))
{
    ExcelWorkbook excelWorkBook = excelPackage.Workbook;
    ExcelWorksheet excelWorksheet = excelWorkBook.Worksheets.First();
    excelWorksheet.Cells[1, 1].Value = "Test";
    excelWorksheet.Cells[3, 2].Value = "Test2";
    excelWorksheet.Cells[3, 3].Value = "Test3";

    excelPackage.SaveAs(ms); // This is the important part.
}

ms.Position = 0;
return new FileStreamResult(ms, "application/xlsx")
{
    FileDownloadName = "Tester.xlsx"
};

Answer 4

You can use the Interop dll's from Microsoft to edit office documents http://msdn.microsoft.com/en-us/library/15s06t57.aspx. Add the "Microsoft.Office.Interop.Excel.dll" to your solution. With this code i've changed 2 cell values.

static void Main(string[] args)
{
        Application excel = new Application();

        Workbook workbook = excel.Workbooks.Open(@"C:\Users\Martijn\Documents\Test.xlsx", ReadOnly: false, Editable:true);
        Worksheet worksheet = workbook.Worksheets.Item[1] as Worksheet;
        if (worksheet == null)
            return;

        Range row1 = worksheet.Rows.Cells[1, 1];
        Range row2 = worksheet.Rows.Cells[2, 1];

        row1.Value = "Test100";
        row2.Value = "Test200";


        excel.Application.ActiveWorkbook.Save();
        excel.Application.Quit();
        excel.Quit();
    }

I've started with Test1 and Test2 wich after the program running changed into the proper values.

Answer 5

although this is answered I'll add from my experience.

It is easier to open the ExcelPackage from FileInfo instead of Stream, then saving becomes simpler.

FileInfo file = new FileInfo(path);

        using (var package = new ExcelPackage(file))
        {
            ExcelWorkbook workBook = package.Workbook;
            ExcelWorksheet currentWorksheet = workBook.Worksheets.SingleOrDefault(w =>  w.Name == "sheet1");

            int totalRows = currentWorksheet.Dimension.End.Row;
            int totalCols = currentWorksheet.Dimension.End.Column;

            for (int i = 2; i <= totalRows; i++)
            {                   
                try
                {
                    currentWorksheet.Cells[i, 1].Value = "AAA";

                }
                catch (Exception ex)
                {
                    _logger.Error(String.Format("Error: failed editing  excel. See details: {0}", ex));
                    return;
                }
            }

            package.Save();