csharp leer excel

Posted 2021-05-12

using (OleDbConnection conn = new OleDbConnection())
            {
                string fileNameWithPath = @ConfigurationManager.AppSettings["ExcelSIP"].ToString();
                DataTable dt = new DataTable();
                string fileExtension = Path.GetExtension(fileNameWithPath);
                if (fileExtension == ".xls" | fileExtension == ".XLS")
                    conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileNameWithPath + ";" + "Extended Properties='Excel 8.0;HDR=YES;'";
                if (fileExtension == ".xlsx" | fileExtension == ".XLSX")
                    conn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileNameWithPath + ";" + "Extended Properties='Excel 12.0 Xml;HDR=YES;'";
                using (OleDbCommand comm = new OleDbCommand())
                {
                    comm.CommandText = "Select * from [Hoja1$]";
                    comm.Connection = conn;
                    using (OleDbDataAdapter da = new OleDbDataAdapter())
                    {
                        da.SelectCommand = comm;
                        da.Fill(dt);
                        foreach (DataRow row in dt.Rows)
                        {
                            string oficina = row[6].ToString();
                            if (!listaOficinasEnviadas.Contains(oficina))
                            {
                                crearExcel(oficina);
                                mandarCorreo(oficina);
                                listaOficinasEnviadas.Add(oficina);
                            }
                        }
                    }
                }
            }