C＃如何動態地在上下文子菜單上添加單擊事件

Question

大家好，我在創建子菜單的單擊菜單時遇到問題，通常我可以將其投射到其每個屬性上，但是我的子菜單來自數據庫，我不知道如何添加硬編碼的單擊事件

到目前為止我的代碼

void loadTechnicianData()
        {
            TechnicianPanel.Controls.Clear();
            query = "SELECT * FROM `tbl_technician`";
            using (MySqlConnection conn = constrings.GetDBConnection())
            {
                try
                {
                    conn.Open();
                    using (MySqlCommand cmd = new MySqlCommand(query, conn))
                    {
                        using (MySqlDataReader reader = cmd.ExecuteReader())
                        {
                            while (reader.Read())
                            {
                                Tech_UC uc = new Tech_UC();
                                uc.TechHeader.Text = reader["technician"].ToString();
                                uc.TechHeader.BackColor = Color.FromName(reader["color_assigned"].ToString());
                                uc.id = Convert.ToInt32(reader["t_id"].ToString());
                                TechnicianPanel.Controls.Add(uc);

                                ToolStripMenuItem cm = startToolStripMenuItem as ToolStripMenuItem;
                                cm.DropDownItems.Add(reader["technician"].ToString());

                            //here i need to call a click event to call a method void outside the loop
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    CMessageBox m = new CMessageBox("error\n" + ex);
                    m.ShowDialog();
                }
                finally
                {
                    conn.Close();
                }
            }
        }

Answer 1

嘗試這個：

cm.DropDownItems.Add(reader["technician"].ToString()).Click += MyMethod;

附：

void MyMethod(object sender, EventArgs e);

如果簡短且不可重用，則可以使用委托或lambda表達式代替方法：

cm.DropDownItems.Add(reader["technician"].ToString()).Click += (_sender, _e) =>
{
  ...
};