多个文件上传和转换成HTML格式

我试图上传多个文件，并同时将它们转换为.html格式，将它们放入for循环。多个文件上传完成并存储在"上传"文件中，但只有第一个文件被转换为.htm格式，而不是全部。

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);
                }
            }
        }
    }