Multiple File Upload and converting them into .htm doc-forma

Question

I am trying to upload multiple files and simultaneously converting them into `.html` format by putting them into a for loop. Multiple files upload is done and stored into "uploaded" file but only the first file is converted into `.htm` format, not all.

Here is my code:

    protected void btnUpload_Click(object sender, EventArgs e)
        {
    
            HttpFileCollection fileCollection = Request.Files;
            //Code to check if user has selected any file on the form
            if (!(fUpload1.HasFile))
            {
                lblMessage1.Text = "Please choose file to upload";
            }
            else
            {
                for (int i = 0; i < fileCollection.Count; i++)
                {
                    try
                    {
                        HttpPostedFile uploadfile = fileCollection[i];
                        string fileName = System.IO.Path.GetFileName(uploadfile.FileName);
   
                        //To check the file extension if it is word document or something else
                        //string strFileName = fUpload1.FileName;
                        string[] strSep = fileName.Split('.');
                        int arrLength = strSep.Length - 1;
                        string strExt = strSep[arrLength].ToString().ToUpper();
                       
                        //Save the uploaded file to the folder
                        strPathToUpload = Server.MapPath("Uploaded2");
                       
                        //Map-path to the folder where html to be saved
                        strPathToConvert = Server.MapPath("Aadi2");
                       
                        object FileName = strPathToUpload + "\\" + fileName;
                        object FileToSave = strPathToConvert + "\\" + fileName + ".htm";
                       
                        if (strExt.ToUpper().Equals("DOC") | strExt.ToUpper().Equals("DOCX"))
                        {
                            uploadfile.SaveAs(strPathToUpload + "\\" + fileName);
                            lblMessage1.Text = "File uploaded successfully";
                            //open the file internally in word. In the method all the parameters should be passed by object reference
                            objWord.Documents.Open(ref FileName, ref readOnly, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref isVisible, ref missing, ref missing, ref missing, ref missing, ref missing);
                            //Do the background activity
                            objWord.Visible = false;
   
   
                            Microsoft.Office.Interop.Word.Document oDoc = objWord.ActiveDocument;
                            oDoc.SaveAs(ref FileToSave, ref fltDocFormat, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing, ref missing);
                            lblMessage1.Text = fileName + " done";
   
                        }
                        else if (strExt.ToUpper().Equals("JPG"))
                        {
                            strPathToUpload = Server.MapPath("images");
                            uploadfile.SaveAs(strPathToUpload + "\\" + fUpload1.FileName);
                            lblMessage1.Text = "logo uploaded successfully";
   
                        }
                        else if (strExt.ToUpper().Equals("TXT"))
                        {
                            strPathToUpload = Server.MapPath("name");
                            fUpload1.SaveAs(strPathToUpload + "\\" + fUpload1.FileName);
                            lblMessage1.Text = "Website name uploaded successfully";
   
                        }
                        else if (strExt.ToUpper().Equals("MP4"))
                        {
                            strPathToUpload = Server.MapPath("video");
                            fUpload1.SaveAs(strPathToUpload + "\\" + fUpload1.FileName);
                            lblMessage1.Text = "Video uploaded successfully";
   
                        }
   
                        else
                        {
                            lblMessage1.Text = "Invalid file selected!";
                        }
                        //Close/quit word
                        objWord.Quit(ref missing, ref missing, ref missing);
                    }
                    catch (Exception ex)
                    {
                        Response.Write(ex.Message);
                    }
                }
            }
        }