private void frmUpdateBook_Load(object sender, EventArgs e)
        {
            //GET DATATABLE FROM DATABASE
            BookDTB      = bd.GetBookTable().Tables[0];
            BookTypeDTB  = bd.GetBookTypeTable().Tables[0];
            PublisherDTB = bd.GetPublisherTable().Tables[0];
            AuthorDTB    = bd.GetAuthorTable().Tables[0];
            SuggestDTB   = nb.GetSuggestTable().Tables[0];
            //SET DATASOURCE TO DATAGRIDVIEW
            dgvBook.DataSource        = BookDTB;
            dgvBookType.DataSource    = BookTypeDTB;
            dgvPublisher.DataSource   = PublisherDTB;
            dgvSuggestList.DataSource = SuggestDTB;
            dgvSuggestColumnsDelete();
            //COMBOBOX DATA
            GetSourceCbb();


            //TEXTBOX BINDING
            TXTBookDataBindings();
            TXTBookTypeDataBindings();
            TXTPublisherDataBindings();
            TXTSuggestDataBindings();

            //SET TEXTBOX IS READONLY
            TXTBookSetReadOnly();
            TXTBookTypeSetReadOnly();
            TXTPublisherSetReadOnly();
            TXTSuggestSetReadOnly();
        }