capture the button click to update the rows in datagrid

1 . PageIndexChanging is a Method of Gridview.
2.  Make Gridview AllowPaging True in Property of Gridview.

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
       
        GridView1.PageIndex = e.NewPageIndex;
        string str="select * from ABC";
        sqldataadapter ad=new Sqldatadapter(str,connection);
        dataset ds=new dataset();
         ad.fill(ds);

         Gridview1.Datasource=ds;
         Gridview1.databind();

    }

 private void CreateTable
{                     
            try
            {
                int count = 0;
                startingRec = curPage * 10;
                int noOfRec_to_display = startingRec + 10; ;  

                for (int i = startingRec; i < noOfRec_to_display; i++)
                {
                    try
                            {
                                Image img = Image.FromFile("<complete path="">www.jpg"                                Bitmap result = new Bitmap(100, 100);
                                using (Graphics g = Graphics.FromImage((Image)result))
                                                                        g.DrawImage(new Bitmap("www.jpg"), 0, 0, 100, 100);
                                    
                                this.dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
                                dataGridView1.Rows.Add(m_PrimaryLotId[i], m_LotId[i], m_Title[i], result);
                                dataGridView1.Rows[count++].Height = 100;
                                dataGridView1.AllowUserToAddRows = false;

                            }
                            catch (System.IO.FileNotFoundException ex)
                            {
                                MessageBox.Show(ex.Message);
                            }
                }
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
            }
        }