Add Worksheets to Workbook

22 Dec 20226 minutes to read

While handling Excel templates, you should add worksheets to workbook to fill certain data and manipulate it.

The following code shows how to add five worksheets within a workbook with Interop and XlsIO for .NET.

Interop

C#

private void AddWorksheet()
{
  //Instantiate the application object
  var excelApp = new Microsoft.Office.Interop.Excel.Application();

  //Specify the template Excel file path
  string myPath = "Sample.xlsx";

  //Open the Excel file
  Workbook workbook = excelApp.Workbooks.Open(myPath);

  //Declare a worksheet object
  Worksheet newWorksheet;

  //Add five new worksheets to the workbook and fill some data into the cells
  for (int i = 1; i <= 5; i++)
  {
    //Add a worksheet to the workbook
    newWorksheet = excelApp.Worksheets.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value);

    //Name the sheet
    newWorksheet.Name = "New_Sheet" + i.ToString();

    //Get the cells collection
    Range cells = newWorksheet.Cells;

    //Input a string value to a cell of the sheet
    cells.set_Item(i, i, "New_Sheet" + i.ToString());
  }

  //Save as Excel file
  workbook.SaveCopyAs("InteropOutput_AddWorksheet.xlsx");

  //Quit the application
  excelApp.Quit();
}

VB.NET

Private Sub AddWorksheet()
  'Instantiate the application object
  Dim excelApp = New Microsoft.Office.Interop.Excel.Application()

  'Specify the template Excel file path
  Dim myPath As String = "Sample.xlsx"

  'Open the Excel file
  Dim workbook As Workbook = excelApp.Workbooks.Open(myPath)

  'Declare a worksheet object
  Dim newWorksheet As Worksheet

  'Add five new worksheets to the workbook And fill some data into the cells
  For i As Integer = 1 To 5
    'Add a worksheet to the workbook
    newWorksheet = excelApp.Worksheets.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value)

    'Name the sheet
    newWorksheet.Name = "New_Sheet" & i.ToString()

    'Get the cells collection
    Dim cells As Range = newWorksheet.Cells

    'Input a string value to a cell of the sheet
    cells.Item(i, i) = "New_Sheet" & i.ToString()
  Next

  'Save as Excel file
  workbook.SaveCopyAs("InteropOutput_AddWorksheet.xlsx")

  'Quit the application
  excelApp.Quit()
End Sub

XlsIO

C#

private void AddWorksheet()
{
  using (ExcelEngine excelEngine = new ExcelEngine())
  {
    //Instantiate the application object        
    IApplication application = excelEngine.Excel;

    //Specify the template Excel file path
    string myPath = "Sample.xlsx";

    //Instantiate a new workbook
    //Open the Excel file
    IWorkbook workbook = application.Workbooks.Open(myPath);

    //Declare a worksheet object
    IWorksheet newWorksheet;

    //Add five new worksheets to the workbook and fill some data into the cells
    for (int i = 1; i <= 5; i++)
    {
      //Add a worksheet to the workbook
      newWorksheet = workbook.Worksheets.Create("New_Sheet" + (i).ToString());

      //Get the cells collection
      IRange cells = newWorksheet.Range;

      //Input a string value to a cell of the sheet
      cells[i, i].Value = "New_Sheet" + (i).ToString();
    }

    //Save as Excel file
    workbook.SaveAs("XlsIOOutput_AddWorksheet.xlsx");
  }
}

VB.NET

Private Sub AddWorksheet()
  Using excelEngine As ExcelEngine = New ExcelEngine()
    'Instantiate the application object
    Dim application As IApplication = excelEngine.Excel

    'Specify the template Excel file path
    Dim myPath As String = "Sample.xlsx"

    'Instantiate a new workbook
    'Open the Excel file
    Dim workbook As IWorkbook = application.Workbooks.Open(myPath)

    'Declare a worksheet object
    Dim newWorksheet As IWorksheet

    'Add five new worksheets to the workbook and fill some data into the cells
    For i As Integer = 1 To 5
      'Add a worksheet to the workbook
      newWorksheet = workbook.Worksheets.Create("New_Sheet" & (i).ToString())

      'Get the cells collection
      Dim cells As IRange = newWorksheet.Range

      'Input a string value to a cell of the sheet
      cells(i, i).Value = "New_Sheet" & (i).ToString()
    Next

    'Save as Excel file
    workbook.SaveAs("XlsIOOutput_AddWorksheet.xlsx")
  End Using
End Sub