Réponse acceptée !
Salut,
Utilise l'évènement CellMouseDoubleCLick de ton datagridview
tonDataGridView.CellMouseDoubleClick += new System.Windows.Forms.DataGridViewCellMouseEventHandler(this.tonDataGridView_CellMouseDoubleClick);
private void tonDataGridView_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
{
Form f = new Form();
f.Show();
}
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