excel integration with c# .net

Question

I needs to create shipping lable based on the excel template at run time using the c#.

Right now I have working system, where I am replacing the fields name in excel template with database value and sending it for printing.

But It is creating space if value is null in database. I don't want that space. In a single excel row, there are more than 2 cells needs to be replaced so if value is not present then I needs to delete the cell only(as I can't delete row) and shift its just below cell to that position or merge it with below cell.

If you have any better way to generate shipping lable based on excel template then let me know that.Thanks

                Excel.Application xlApp;
            Excel.Workbook xlWorkBook;
            Excel.Worksheet xlWorkSheet;
            object misValue = System.Reflection.Missing.Value;
            xlApp = new Excel.ApplicationClass();

            //string path = AppDomain.CurrentDomain.BaseDirectory + @printLabelName;
            string fileLocation = "";
            DataTable dtPath = clsData.getFileLocations();
            if (dtPath.Rows.Count != 0)
            {
                //ctbExport.Text = dt.Rows[0]["exportFileLocation"].ToString();
                fileLocation = dtPath.Rows[0]["printTemplateLocation"].ToString() + "\\";
            }

            String[] orderList = ctbOrderNo.Text.Split(' ');
            for (int i = 0; i < orderList.LongLength; i++)
            {
                string strOrderNo = orderList[i];

                int val = clsData.updOrderDataBulkPrint(Convert.ToDecimal(ctbCustomValue.Text), cmbCustomType.Text, strOrderNo);

                DataTable dt = clsData.getOrderDetailByOrderNo(strOrderNo);
                if (dt.Rows.Count == 0)
                {
                    MessageBox.Show("Order No. " + strOrderNo + " doesn't exist");
                    return;
                }
                DataTable dtSender = clsData.getSenderDataById(Convert.ToInt32(cmbSender.SelectedValue));
                if (dtSender.Rows.Count > 0 && dt.Rows.Count > 0)
                {
                    //We will name shipping label excel template file names as number for e.g. 1 , 2 , 3 , 4 , 4 etc. 
                    //user will put of these values and then system will know which shipping label excel template to use for all these orders.
                    string printLabelName = numUpDownPrintLabelRype.Value.ToString() + ".xlsx";

                    //string path = AppDomain.CurrentDomain.BaseDirectory + @printLabelName;                       
                    string path = fileLocation + @printLabelName;

                    bool isPathCorrect = true;
                    try
                    {
                        object missingValue = Type.Missing;

                        xlWorkBook = xlApp.Workbooks.Open(path, 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
                        xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

                        //MessageBox.Show(xlWorkSheet.get_Range("A1", "A1").Value2.ToString());                                           
                        xlWorkSheet.Cells.Replace("SenderName", dtSender.Rows[0]["senderName"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("SenderCompanyName", dtSender.Rows[0]["senderCompanyName"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("SenderAdressLine1", dtSender.Rows[0]["senderAdressLine1"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("SenderAddressLine2", dtSender.Rows[0]["senderAddressLine2"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("SenderCity", dtSender.Rows[0]["senderCity"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("SenderState", dtSender.Rows[0]["senderState"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("SenderZIP", dtSender.Rows[0]["senderZIP"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("SenderCountry", dtSender.Rows[0]["senderCountry"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("OrderNumber", dt.Rows[0]["orderNo"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("Zone", dt.Rows[0]["zone"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);

                        xlWorkSheet.Cells.Replace("CustomerName", dt.Rows[0]["customerName"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);

                        xlWorkSheet.Cells.Replace("CustomerCompanyName", dt.Rows[0]["cCompanyName"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);

                        object misval = Type.Missing;



                      //Replace values by database values here


                        xlWorkSheet.Cells.Replace("CustomerAddressLine1", dt.Rows[0]["cAddressLine1"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("CustomerAddressLine2", dt.Rows[0]["cAddressLine2"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("CustomerAddressLine3", dt.Rows[0]["cAddressLine3"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("CustomerAddressCity", dt.Rows[0]["cAddressCity"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("CustomerAddressState", dt.Rows[0]["cAddressState"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("CustomerAddressZIP", dt.Rows[0]["cAddressZIP"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("CustomerAddressCountry", dt.Rows[0]["cAddressCountry"].ToString(), missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);

                        xlWorkSheet.Cells.Replace("ProductType", cmbProdType.Text, missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("CustomsType", cmbCustomType.Text, missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);
                        xlWorkSheet.Cells.Replace("CustomsValue", ctbCustomValue.Text, missingValue, missingValue, missingValue, missingValue, missingValue, missingValue);

                        xlWorkBook.PrintOut(1, 1, 1, false, misValue, misValue, misValue, misValue);

                        xlWorkBook.Close(false, misValue, misValue);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("Can't open Label Template, please check location.");
                        isPathCorrect = false;
                    }
                }
                else {
                    MessageBox.Show("This Sender doesn't exist.");
                }
            }
            xlApp.Quit();

Answer 1

so if value is not present then I needs to delete the cell only(as I can't delete row) and shift its just below cell to that position or merge it with below cell

You want to use the .Range.Delete(Shift) method that is given in the Excel PIA DLLs (the interop DLLs which I'm sure you're already using).

http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.range.delete(v=office.11).aspx

xlDeleteShiftDirection

Once you find the cell that you want to delete, use something like this (which part of was lifted from your code example):

UNTESTED

xlWorkSheet.get_Range("A1", "A1").Delete(XlDeleteShiftDirection.xlShiftUp);