winform右键菜单

 

public partial class Form1 : Form
    {
        ContextMenuStrip cms;
        Bitmap bm ;
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {

            if (e.Button == MouseButtons.Right)
            {
                if (cms.Items.Count > 0)
                {
                    cms.Items.Clear();
                }
                //带图表项
                cms.Items.Add("tubiao",bm,new EventHandler(tubiao_Handler));
                cms.Items.Add("mouseright1");
                cms.Items.Add("-");
                cms.Items.Add("mouseright2");
                cms.Items.Add("-");
                cms.Items.Add("mouseright3");
            }
            else
            {
                return;
            }
            //处理显示位置
            int w= Width-e.X;
            if (w < cms.Width)
            {
                cms.Show(this, e.X - cms.Width, e.Y);
            }
            else
            {
                cms.Show(this,e.X,e.Y);
            }

        }
        public void tubiao_Handler(object sender, EventArgs e)
        {
            MessageBox.Show("this is tubiao", "tubiao", MessageBoxButtons.YesNo);
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            cms = new ContextMenuStrip();
            bm = new Bitmap("Resources/Icon1.ico");//图标存放位置
        }
    }