Question

I need to manipulate Excel Spreadsheets in C sharp .net 2010. The sum total of what I need to do is loop through an excel spreadsheet, add three columns to the left of the original columns based on some calculations from the other spreadsheets plus some other functions. What is the latest and greatest way to do this? Currently I am opening the excel spreadsheet and reading the records I need and printing them to screen with this function succefully:

    public static void parseData(string excelFileName)
    {
        try
        {
            //Workbook workBook = _excelApp.Workbooks.Open(excelFileName, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
            //Worksheet wkSheet = (Worksheet)_excelApp.Worksheets[1];
            //OLEObject oleObject = wkSheet.OLEObjects(Type.Missing);
            using (OleDbConnection connection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties=\"Excel 12.0;HDR=No;IMEX=1\""))
            {
                connection.Open();
                OleDbCommand objCmdSelect = new OleDbCommand("SELECT * FROM [Sheet1$]", connection);
                OleDbDataAdapter objAdapter1 = new OleDbDataAdapter();

                objAdapter1.SelectCommand = objCmdSelect;
                objAdapter1.Fill(ds);
            }

            foreach (System.Data.DataTable myTable in ds.Tables)
            {
                //xmlResultSet.Append("<TemplateData>");                                        
                foreach (DataRow myRow in myTable.Rows)
                {
                    //Console.WriteLine("Ca0mon, please work :{0}", myRow);
                    Console.WriteLine("This thing better Work-- MRN: {0}| Patient Name: {1}| Address: {2}| CSSV: {3}", myRow[0], myRow[1], myRow[2], myRow[3]);
                }
            }

        }
        catch(Exception ex)
        {
        }
    }

Any advice on how to approach this with the latest and greatest .net Tools? Thanks for your help.

Answer 1

With your Office installation, opt to install the Interop libraries. After you have done this, go to Add Reference, click on the COM tab, and add Microsoft Excel 12.0 Objects library.

Use the namespace using Microsoft.Office.Interop.Excel;

You should then go through a tutorial such as this one on MSDN.