Question

I need to receive the key press events during cell editing in DataGridView control.

From what I have found on the net the DataGridView is designed to pass all key events from DataGridView to the cell editing control and you cannot get these events easily.

I found this piece of code that traps those events for DataGrid control, but that does not work for DataGridView.

Answer 1

Finally figured out. There are two parts of this puzzle – getting keys from cell editing control and getting keys from the DataGridView itself. Here’s my code. To use it, you just need to subscribe to the custom event: keyPressHook.

class KeyPressAwareDataGridView : DataGridView {      protected override void OnControlAdded(ControlEventArgs e)     {         this.subscribeEvents(e.Control);         base.OnControlAdded(e);     }      protected override void OnControlRemoved(ControlEventArgs e)     {         this.unsubscribeEvents(e.Control);         base.OnControlRemoved(e);     }      protected override bool ProcessDataGridViewKey(KeyEventArgs e)     {         bool procesedInternally = false;          if (this.keyPressHook != null)         {             this.keyPressHook(this, e);             procesedInternally = e.SuppressKeyPress;         }          if (procesedInternally)         {             return true;         }         else         {             return base.ProcessDataGridViewKey(e);         }     }       private void subscribeEvents(Control control)     {         control.KeyDown += new KeyEventHandler(this.control_KeyDown);         control.ControlAdded += new ControlEventHandler(this.control_ControlAdded);         control.ControlRemoved += new ControlEventHandler(this.control_ControlRemoved);          foreach (Control innerControl in control.Controls)         {             this.subscribeEvents(innerControl);         }     }      private void unsubscribeEvents(Control control)     {         control.KeyDown -= new KeyEventHandler(this.control_KeyDown);         control.ControlAdded -= new ControlEventHandler(this.control_ControlAdded);         control.ControlRemoved -= new ControlEventHandler(this.control_ControlRemoved);          foreach (Control innerControl in control.Controls)         {             this.unsubscribeEvents(innerControl);         }     }      private void control_ControlAdded(object sender, ControlEventArgs e)     {         this.subscribeEvents(e.Control);     }      private void control_ControlRemoved(object sender, ControlEventArgs e)     {         this.unsubscribeEvents(e.Control);     }      private void control_KeyDown(object sender, KeyEventArgs e)     {         if (this.keyPressHook != null)         {             this.keyPressHook(this, e);         }     }      public event KeyEventHandler keyPressHook;  }