Unable to convert Eventhandler to KeyPressEventHandler

Question

Whilst running the below code, I get this exception:

Cannot implicitly convert System.Eventhandler to System.Window.Form.KeyPressEventHandler

    private void grdPOItems_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        int colIndex = grdPOItems.CurrentCell.ColumnIndex;
        string colName = grdPOItems.Columns[colIndex].Name;
        if(colName == "Qty" || colName == "Rate")
        {
            e.Control.KeyPress += new EventHandler(CheckKey);
        }
    }

    private void CheckKey(object sender, EventArgs e)
    {
        if (((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8 && e.KeyChar!='.'))
        {
            e.Handled = true;
        }  
    }

Possible duplicate of [Cannot implicitly convert type 'System.EventHandler' to 'System.EventHandler — , May 30 '17 at 17:16

score 1 · Accepted Answer · answered Jul 05 '16 at 08:51

According to the MSDN, your handler has the wrong signature. Use this instead.

 e.Control.KeyPress += CheckKey;

private void CheckKey(object sender, KeyPressEventArgs  e)
{
    if (((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8 && e.KeyChar!='.'))
    {
        e.Handled = true;
    }  
}

Unable to convert Eventhandler to KeyPressEventHandler

1 Answers1