MouseButtons.Right不起作用

 为什么鼠标左键起作用，右键不起作用,在线等
private void cklist_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                string str;
                CheckedListBox ck = (CheckedListBox)sender;
                string m_tableName = ck.Name;
                //遍历被选中的字段
                for (int i = 0; i < ck.Items.Count; i++)
                {
                    if (ck.GetItemChecked(i))
                    {
                        str = ck.Items[i].ToString();
                       
                    }
                }
            }
        }
--------------------编程问答-------------------- 在MouseUp事件中定义试试看

补充：.NET技术 ,  C#