如何在右键单击datagridview单元格时显示上下文菜单

// 创建上下文菜单
ContextMenuStrip contextMenuStrip1 = new ContextMenuStrip();
ToolStripMenuItem toolStripMenuItem1 = new ToolStripMenuItem("菜单项1");
ToolStripMenuItem toolStripMenuItem2 = new ToolStripMenuItem("菜单项2");
contextMenuStrip1.Items.AddRange(new ToolStripItem[] { toolStripMenuItem1, toolStripMenuItem2 });

// 关联上下文菜单
dataGridView1.ContextMenuStrip = contextMenuStrip1;

// 处理右键单击事件
private void dataGridView1_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
    if (e.Button == MouseButtons.Right && e.RowIndex >= 0 && e.ColumnIndex >= 0)
    {
        // 在指定位置显示上下文菜单
        dataGridView1.CurrentCell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
        contextMenuStrip1.Show(MousePosition);
    }
}