Count number of files c #

Good afternoon! I have a listView with several checkbox's. I want to count all the checkbox files that are selected. I made the following code, but it is not working.

if (listView.Items[j].CheckState == CheckState.Checked)
                {
                    string countVersions = listView.CheckedItems.Count.ToString();


                        {

                        try
                        {


                            UltraListViewItem item = listView.Items[j];
                            {
                                int countVerao = int.Parse(countVersions);
                                for (int i = 0; i <= countVerao + 1; i++)

                                {
                                    DataBaseUpdate dataBaseUpdate = mUpdater.GetDataBaseUpdateByID((int)item.Tag);

                                    DataBaseUpdateFilesCollection dataBaseUpdateFilesCollection = mUpdater.GetDatabaseUpdateFilesByDataBaseUpdate(dataBaseUpdate.ID);

                                    countFiles = dataBaseUpdateFilesCollection.Count.ToString();

                                    totalFiles = totalFiles + int.Parse(countFiles);
                                }
                                DataBaseUpdateFilesCollection dataBaseUpdateFilesCollection1 = mUpdater.GetDatabaseUpdateFilesByDataBaseUpdate(dataBaseUpdate.ID);
                                mProgressBarPercPerElem = (perc /= (int.Parse(countFiles)));

                                foreach (DataBaseUpdateFiles filesSql in dataBaseUpdateFilesCollection1)
                                {


                                }

My problem is here. It is always passing in the first element of the listview, and I want it to scroll through all those that are selected. for (int i = 0; i