Excel Programming (C# + VBA) Part III

 

Step 6 Import the data in excel to database

a.       Create excel app object and open the uploaded file

            Microsoft.Office.Interop.Excel.Application xlsApp = new ApplicationClass();

            Workbook wb = xlsApp.Workbooks.Open(_filePath,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);

            wb.Unprotect(TemplatePassword);

 

b.      Save the upload file as a temporary file. Then close uploaded file and open the temporary file

           string tempFileName = _filePath.ToLower().Replace(".xls","_Temp.xls");      

            wb.Unprotect(TemplatePassword);

            wb.SaveCopyAs(tempFileName);

 

c.       Verify the data in template again in web application

            ReadDataSource((Worksheet)wb.Worksheets[DataSourceSheet], out branchID, out planDate, out startDate, out endDate, out iChecked, out templatetype);

           if(!(iChecked == 1))

            {

                returnVal = "Please verify the data before upload to the server！";

                  throw new Exception(returnVal);

            }

            if(templatetype.ToUpper() != _templatetype.ToUpper())

            {

                  returnVal = "The version is not corrected, please verify the document and uploaded again";

                  throw new Exception(returnVal);

            }

 ……

private void ReadDataSource(Worksheet ws, out string branchID, out string planDate, out DateTime startDate,out DateTime endDate, out int iChecked, out string templatetype)

      {

            string check = ws.get_Range("A1", System.Type.Missing).Text.ToString();

            branchID = ws.get_Range("A2", System.Type.Missing).Text.ToString();

            string sDate = ws.get_Range("A4", System.Type.Missing).Text.ToString();

            string eDate = ws.get_Range("A5", System.Type.Missing).Text.ToString();

            planDate = ws.get_Range("A6", System.Type.Missing).Text.ToString();

            templatetype = ws.get_Range("A7", System.Type.Missing).Text.ToString();

            startDate = DateTime.Parse(sDate);

            endDate = DateTime.Parse(eDate);

            try

            {

                  iChecked = Convert.ToInt16(check);

            }

            catch

            {

                  iChecked = 0;

            }

      }    

            

d.      Read the data in the worksheet

            string territoryList = ws.get_Range("B"+ i.ToString(), System.Type.Missing).Text.ToString();

            string territoryIDList = ws.get_Range("AB" + i.ToString(), System.Type.Missing).Text.ToString();

            string category = ws.get_Range("E" + i.ToString(), System.Type.Missing).Text.ToString();

            string categoryID = ws.get_Range("AE" + i.ToString(), System.Type.Missing).Text.ToString();

e.      Change the database based on data in excel sheet

            SqlHelper.ExecuteNonQuery(connnectionString, CommandType.Text, "insert into … ");                 

Summary: Objects used in this sample

a.       Excel.Application

                                                               i.      Application.Workbooks.Open

                                                             ii.      Quit

b.      Excel.Workbook

                                                               i.      SaveCopyAs

                                                             ii.      Unprotect

                                                            iii.      Worksheets

                                                           iv.      Protect

                                                             v.      .Names.Add

                                                           vi.      Close

c.       Excel.WorkSheet

                                                               i.      Unprotect

                                                             ii.      Protect

                                                            iii.      .Hyperlinks.Add

d.      Range

                                                               i.      Value2

                                                             ii.      Text

e.      Cell, Cells