How to handle KeyEvents in a DataGridViewCell?

Question

Is there a Keydown Event of a DataGridViewCell?
What I'm trying to do is when a user is typing in a particular cell, he can press F1 for help of that particular column. And some Form will popup...

What event it is?

Answer 1

I found this code in a forum, and it works.

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
   DataGridViewTextBoxEditingControl tb = (DataGridViewTextBoxEditingControl)e.Control;
   tb.KeyPress += new KeyPressEventHandler(dataGridViewTextBox_KeyPress);    
   e.Control.KeyPress += new KeyPressEventHandler(dataGridViewTextBox_KeyPress);
}
    
private void dataGridViewTextBox_KeyPress(object sender, KeyPressEventArgs e)
{
   //when i press enter,bellow code never run?
   if (e.KeyChar==(char)Keys.Enter)
   {
      MessageBox.Show("You press Enter");
   }
}

Answer 2

another solution is

private void grdDetalle_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        // Sólo queremos esta funcionalidad para determinadas columnas Clave y Nombre
        if ((grdDetalle.Columns[grdDetalle.CurrentCell.ColumnIndex].Name == "colClaveArticulo") ||
            (grdDetalle.Columns[grdDetalle.CurrentCell.ColumnIndex].Name == "colNombre"))
        {
            /// Workarround para que estando editando en las columnas del grid Clave y Nombre
            /// podamos detectar cuando se dio F4 para lanzar el dialogo de busqueda del
            /// articulo.
            e.Control.KeyDown += new KeyEventHandler(dataGridViewTextBox_KeyDown);
            e.Control.Leave += new EventHandler(dataGridViewTextBox_Leave);
        }
    }

    private void dataGridViewTextBox_Leave(object sender, EventArgs e)
    {

        if ((grdDetalle.Columns[grdDetalle.CurrentCell.ColumnIndex].Name == "colClaveArticulo") ||
           (grdDetalle.Columns[grdDetalle.CurrentCell.ColumnIndex].Name == "colNombre"))
        {
            try
            {
                (sender as DataGridViewTextBoxEditingControl).KeyDown -= 
                   new KeyEventHandler(dataGridViewTextBox_KeyDown);
            }
            catch (Exception ex)
            { }
        }
    }

    private void dataGridViewTextBox_KeyDown(object sender, KeyEventArgs e)
    {
        // F4 Pressed
        if ((grdDetalle.Columns[grdDetalle.CurrentCell.ColumnIndex].Name == "colClaveArticulo") ||
           (grdDetalle.Columns[grdDetalle.CurrentCell.ColumnIndex].Name == "colNombre"))
        {
            if (e.KeyCode == Keys.F4) // 115
            {
                MessageBox.Show("Oprimieron F4");
                e.Handled = true;
                e.SuppressKeyPress = true;
            }
        }
    }

Answer 3

I know this is an old question, but I believe I have improved upon the top voted answer.

    IDataGridViewEditingControl _iDataGridViewEditingControl;
    private void SlotTimesDGV_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        if (_iDataGridViewEditingControl is DataGridViewComboBoxEditingControl)
        {
            DataGridViewComboBoxEditingControl iDataGridViewEditingControl = _iDataGridViewEditingControl as DataGridViewComboBoxEditingControl;
            iDataGridViewEditingControl.KeyPress -= SlotTimesDGV_EditingControlShowing_KeyPress;
        }
        if (e.Control is DataGridViewComboBoxEditingControl)
        {
            DataGridViewComboBoxEditingControl iDataGridViewEditingControl = e.Control as DataGridViewComboBoxEditingControl;
            iDataGridViewEditingControl.KeyPress += SlotTimesDGV_EditingControlShowing_KeyPress;
            _iDataGridViewEditingControl = iDataGridViewEditingControl;
        }
    }

    private void SlotTimesDGV_EditingControlShowing_KeyPress(object sender, KeyPressEventArgs e)
    {
        MessageBox.Show("");
    }

By having an instance variable of the IDataGridViewEditingControl, you can remove the KeyPress event that would result in duplicate calls when moving around cells and your event is not limited to only one type of cell.

Answer 4

DataGridViewCell doesn’t have any events, but you can listen for the KeyDown event on the DataGridView itself and then look at which cell is selected:

public void dataGridView_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.F1)
    {
        var selectedCell = dataGridView.SelectedCells[0];
        // do something with selectedCell...
    }
}