C # page Flip design: Home, Prev, Next, last, jump

 int pageSize = 0;         Number of rows per page int nMax = 0;    Total number of records int pagecount = 0;   Number of pages = Total Records/pages per page int pagecurrent = 0;      Current page number int ncurrent = 0;            The current record line private void Bind () {//td = Um.dataall ();      PageSize = 30; Set number of page lines NMax = TD.            Rows.Count;    PageCount = (nmax/pagesize);            Calculates the total number of pages if ((nMax% pageSize) > 0) pagecount++;    Pagecurrent = 1;       The current number of pages starts from 1 ncurrent = 0;        The current number of records starts at 0 loaddata ();   }private void LoadData () {int nstartpos = 0;     The current page starts recording line int nendpos = 0; Current page end record line DataTable dttemp = TD.   Clone ();            Clone the DataTable Structure Framework if (pagecurrent = = PageCount) {nendpos = NMax;            } else {nendpos = pageSize * pagecurrent;            } Nstartpos = Ncurrent; Lblpagecount.text = "Total" + pageCount.tostring () + "page";            Txtcurrentpage.text = convert.tostring (pagecurrent); Copy the record line from the metadata source if (TD.                    Rows.Count > 0) {for (int i = Nstartpos; i < Nendpos; i++) { Dttemp.importrow (TD.                    Rows[i]);                ncurrent++;            }} datagridview1.datasource = Dttemp; DataGridView the line int ENDC = TD is not selected by default.            Rows.Count;            if (Endc > PageSize * pagecurrent) ENDC = pageSize * pagecurrent;            int k = 0; for (int i = pageSize * (pageCurrent-1) + 1; I <= ENDC; i++) {datagridview1.rows[k].                Headercell.value = i.ToString ();            k++;            }}private void Up_click (object sender, EventArgs e) {pagecurrent--; if (pagecurrent <= 0) {MessageBox.Show ("is already the first page,Please click on "Next Page" to view!                ");            Return            } else {ncurrent = PageSize * (pageCurrent-1);        } loaddata ();            } private void Down_click (object sender, EventArgs e) {pagecurrent++; if (Pagecurrent > PageCount) {MessageBox.Show ("is already the last page, please click on" Previous "to view!)                ");            Return            } else {ncurrent = PageSize * (pageCurrent-1);        } loaddata ();            } private void First_click (object sender, EventArgs e) {pagecurrent = 1;            Ncurrent = PageSize * (pageCurrent-1);        LoadData ();            } private void End_click (object sender, EventArgs e) {pagecurrent = PageCount;            Ncurrent = PageSize * (pageCurrent-1);        LoadData (); private void Skip_click (object sender, EventArgs e) {iNT CURRENTP = Convert.ToInt32 (txtCurrentPage.Text.ToString ());                if (Currentp > PageCount) {MessageBox.Show ("more than the maximum number of pages, please reenter");            Return                } else {pagecurrent = CURRENTP;                Ncurrent = PageSize * (pageCurrent-1);            LoadData (); }        }

C # page Flip design: Home, Prev, Next, last, jump