How to write some data to excel file(.xlsx)


This is what i am trying to do.

1.Create excel file(.xlsx) c://test/files/work1_4.13.14.xlsx with name + value(date)

example: work1_4.13.14.xlsx

2.Set headers to the file example: [Name] [Age] [City].

3.I have 3 List with names,ages,city that i need to fill into excel sheet.

This is my goal

Name   Age  City
Ben    20   xyz
Jack   25   xyz
Mike   45   zyx

Any ideas?

6/21/2016 12:57:12 PM

Accepted Answer

Try this code

Microsoft.Office.Interop.Excel.Application oXL;
Microsoft.Office.Interop.Excel._Workbook oWB;
Microsoft.Office.Interop.Excel._Worksheet oSheet;
Microsoft.Office.Interop.Excel.Range oRng;
object misvalue = System.Reflection.Missing.Value;
    //Start Excel and get Application object.
    oXL = new Microsoft.Office.Interop.Excel.Application();
    oXL.Visible = true;

    //Get a new workbook.
    oWB = (Microsoft.Office.Interop.Excel._Workbook)(oXL.Workbooks.Add(""));
    oSheet = (Microsoft.Office.Interop.Excel._Worksheet)oWB.ActiveSheet;

    //Add table headers going cell by cell.
    oSheet.Cells[1, 1] = "First Name";
    oSheet.Cells[1, 2] = "Last Name";
    oSheet.Cells[1, 3] = "Full Name";
    oSheet.Cells[1, 4] = "Salary";

    //Format A1:D1 as bold, vertical alignment = center.
    oSheet.get_Range("A1", "D1").Font.Bold = true;
    oSheet.get_Range("A1", "D1").VerticalAlignment =

    // Create an array to multiple values at once.
    string[,] saNames = new string[5, 2];

    saNames[0, 0] = "John";
    saNames[0, 1] = "Smith";
    saNames[1, 0] = "Tom";

    saNames[4, 1] = "Johnson";

    //Fill A2:B6 with an array of values (First and Last Names).
    oSheet.get_Range("A2", "B6").Value2 = saNames;

    //Fill C2:C6 with a relative formula (=A2 & " " & B2).
    oRng = oSheet.get_Range("C2", "C6");
    oRng.Formula = "=A2 & \" \" & B2";

    //Fill D2:D6 with a formula(=RAND()*100000) and apply format.
    oRng = oSheet.get_Range("D2", "D6");
    oRng.Formula = "=RAND()*100000";
    oRng.NumberFormat = "$0.00";

    //AutoFit columns A:D.
    oRng = oSheet.get_Range("A1", "D1");

    oXL.Visible = false;
    oXL.UserControl = false;
    oWB.SaveAs("c:\\test\\test505.xls", Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookDefault, Type.Missing, Type.Missing,
        false, false, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange,
        Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);


8/1/2019 9:07:26 AM

It is possible to write to an excel file without opening it using the Microsoft.Jet.OLEDB.4.0 and OleDb. Using OleDb, it behaves as if you were writing to a table using sql.

Here is the code I used to create and write to an new excel file. No extra references are needed

var connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\SomePath\ExcelWorkBook.xls;Extended Properties=Excel 8.0";
using (var excelConnection = new OleDbConnection(connectionString))
    // The excel file does not need to exist, opening the connection will create the
    // excel file for you
    if (excelConnection.State != ConnectionState.Open) { excelConnection.Open(); }

    // data is an object so it works with DBNull.Value
    object propertyOneValue = "cool!";
    object propertyTwoValue = "testing";

    var sqlText = "CREATE TABLE YourTableNameHere ([PropertyOne] VARCHAR(100), [PropertyTwo] INT)";

    // Executing this command will create the worksheet inside of the workbook
    // the table name will be the new worksheet name
    using (var command = new OleDbCommand(sqlText, excelConnection)) { command.ExecuteNonQuery(); }

    // Add (insert) data to the worksheet
    var commandText = $"Insert Into YourTableNameHere ([PropertyOne], [PropertyTwo]) Values (@PropertyOne, @PropertyTwo)";

    using (var command = new OleDbCommand(commandText, excelConnection))
        // We need to allow for nulls just like we would with
        // sql, if your data is null a DBNull.Value should be used
        // instead of null 
        command.Parameters.AddWithValue("@PropertyOne", propertyOneValue ?? DBNull.Value);
        command.Parameters.AddWithValue("@PropertyTwo", propertyTwoValue ?? DBNull.Value);


Hope here is the exact what we are looking for.

private void button2_Click(object sender, RoutedEventArgs e)
    UpdateExcel("Sheet3", 4, 7, "[email protected]");

private void UpdateExcel(string sheetName, int row, int col, string data)
    Microsoft.Office.Interop.Excel.Application oXL = null;
    Microsoft.Office.Interop.Excel._Workbook oWB = null;
    Microsoft.Office.Interop.Excel._Worksheet oSheet = null;

        oXL = new Microsoft.Office.Interop.Excel.Application();
        oWB = oXL.Workbooks.Open("d:\\MyExcel.xlsx");
        oSheet = String.IsNullOrEmpty(sheetName) ? (Microsoft.Office.Interop.Excel._Worksheet)oWB.ActiveSheet : (Microsoft.Office.Interop.Excel._Worksheet)oWB.Worksheets[sheetName];

        oSheet.Cells[row, col] = data;


    catch (Exception ex)
        if (oWB != null)

just follow below steps:

//Start Excel and get Application object.

oXL = new Microsoft.Office.Interop.Excel.Application();

oXL.Visible = false;