DataGridView Adding a Batch selection box to a table header

/// <summary>          ///add a full selection to DataGridView/// </summary>           Public classAddcheckboxtodatagridview { Public StaticSystem.Windows.Forms.DataGridView DGV;  Public Static voidAddfullselect () {if(DGV. Rows.Count <1)                  {                      return; } System.Windows.Forms.CheckBox Ckbox=NewSystem.Windows.Forms.CheckBox (); Ckbox.text="Select All"; Ckbox.checked=true; System.Drawing.Rectangle rect=DGV. Getcelldisplayrectangle (0, -1,true); Ckbox.size=NewSystem.Drawing.Size (DGV. columns[0]. Width, -); Ckbox.location=rect.                  Location; Ckbox.checkedchanged+=NewEventHandler (ckbox_checkedchanged); DGV.              Controls.Add (Ckbox); }              Static voidCkbox_checkedchanged (Objectsender, EventArgs e) {                   for(inti =0; I < DGV. Rows.Count; i++) {DGV. Rows[i]. cells[0]. Value =((System.Windows.Forms.CheckBox) sender).                  Checked; } DGV.              EndEdit (); }          }

Calling methods

ADDCHECKBOXTODATAGRIDVIEW.DGV = Dgvks_ry;                      Addcheckboxtodatagridview.addfullselect ();

DataGridView Adding a Batch selection box to a table header