如何根据鼠标悬停在单元格上时单元格中的值在DataGridView中显示单元格的工具提示

private void dataGridView1_CellMouseEnter(object sender, DataGridViewCellEventArgs e)
{
    if (e.RowIndex >= 0 && e.ColumnIndex >= 0)  // 确保鼠标悬停在有效的单元格上
    {
        DataGridViewCell cell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
        dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].ToolTipText = cell.Value.ToString();
    }
}

private void dataGridView1_CellMouseLeave(object sender, DataGridViewCellEventArgs e)
{
    if (e.RowIndex >= 0 && e.ColumnIndex >= 0)  // 确保鼠标离开有效的单元格
    {
        DataGridViewCell cell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
        dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].ToolTipText = "";
    }
}