.Net Excel Interop Deleting a worksheet

Question

I'm trying to delete a worksheet from a excel document from a .Net c# 3.5 application with the interop Excel class (for excel 2003).

I try many things like :

Worksheet worksheet = (Worksheet)workbook.Worksheets[1];
worksheet.Delete();

It's doesn't work and doesn't throw any error ...

Answer 1

After more than one hour looking I found the answer:

xlApp.DisplayAlerts = false;
worksheet.Delete();
xlApp.DisplayAlerts = true;

Answer 2

When dealing with deleting Excel Worksheets, there are two important things to know:

1. Excel interop counts from 1 (and not from zero), therefore, removing the second item will cause the third item to take its place!. so, the proper way to remove worksheets is from the last to the first:

   // Remove LAST worksheet
   MyWorkBook.Worksheets[3].Delete();
   
   // and only then remove the second (which is the last one)
   MyWorkBook.Worksheets[2].Delete();
   

   alternatively, you can delete the second item ([2]) on the list twice, which will give you the same result.

2. The following line will throw exception when you only got one worksheet left:

    MyWorkBook.Worksheets[1].Delete();
   

Answer 3

It is also important to note that the workbook must contain at least one worksheet; this means you cannot delete all worksheets in a workbook.

Answer 4

Microsoft.Office.Interop.Excel.Worksheet worksheet = Microsoft.Office.Interop.Excel.Worksheet)xlWorkBook.Worksheets[1];
worksheet.Delete();

Answer 5

Try to find worksheet by name:

var app = new Microsoft.Office.Interop.Excel.Application();
var workbook = app.Workbooks.Add();
((Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets["Sheet3"]).Delete();

Answer 6

we can delete the work sheet like this

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

                if (xlApp == null)
                {

                    return;
                }


                xlApp.DisplayAlerts = false;
                string filePath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location)
                                        + "\\Sample.xlsx";
                Excel.Workbook xlWorkBook = xlApp.Workbooks.Open(filePath, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);
                Excel.Sheets worksheets = xlWorkBook.Worksheets;

                worksheets[4].Delete();
                worksheets[3].Delete();
                xlWorkBook.Save();
                xlWorkBook.Close();

                releaseObject(worksheets);
                releaseObject(xlWorkBook);
                releaseObject(xlApp);

and use this

  static void releaseObject(object obj)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                obj = null;
            }
            catch (Exception ex)
            {
                obj = null;
                throw ex;

            }
            finally
            {
                GC.Collect();
            }
        }

Answer 7

We delete excel worksheets from a c# console application like this:

 Microsoft.Office.Interop.Excel.Worksheet worksheet = 
 (Worksheet)workbook.Worksheets["Worksheet_Name" (or) "Countings"];
 worksheet.Delete();