How to display the count in datagridview using windows forms

In my application i am displaying the messages if file is uploaded successfully and at the same time i am displaying the message that it is not uploaded in a message box the problem is i need to click ok button in message box each and every time when the message occours suppose if 40 files are not inserted i need to click ok button for 40 times i need to display the files which are inserted and which are not inserted at  a time in a datagridview.how can i do this.


                                   if (ErrorMessage == 0)
                                    {
                                        Ffname += path + "-" + "Uploaded successfully" + "\n";
                                    }
                                    else
                                    {
                                        NotInsFiles += path + " - " + "Not Inserted" + "\n";
                                    }
                                    lbluplodedfile.Text = TabNotIns;
                                    if (Ffname != null || Ffname != "")
                                    {
                                    MessageBox.Show(Ffname);
                                    lbluplodedfile.Text = Ffname;
                                    }
                                    else
                                    {
                                    MessageBox.Show(NotInsFiles);
                                    }

my above code displays the inserted and not inserted files in message box but i need to show all of them in datagridview that too at last how can i do this