C# 右鍵選單 [CS_ContextMenuStrip]

資料來源: https://www.itread01.com/p/623767.html

GITHUB: https://github.com/jash-git/CS_ContextMenuStrip

Form1.Designer.cs

namespace CS_ContextMenuStrip
{
    partial class Form1
    {
        /// <summary>
        /// 設計工具所需的變數。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清除任何使用中的資源。
        /// </summary>
        /// <param name="disposing">如果應該處置 Managed 資源則為 true，否則為 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form 設計工具產生的程式碼

        /// <summary>
        /// 此為設計工具支援所需的方法 - 請勿使用程式碼編輯器修改
        /// 這個方法的內容。
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
            this.SuspendLayout();
            // 
            // contextMenuStrip1
            // 
            this.contextMenuStrip1.Name = "contextMenuStrip1";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(284, 261);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.Click += new System.EventHandler(this.Form1_Click);
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
    }
}

Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace CS_ContextMenuStrip
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void toolStripMenuItem_Click(object sender, EventArgs e)
        {
            ToolStripMenuItem menu = sender as ToolStripMenuItem;
            MessageBox.Show(menu.Text);
        }
        private ToolStripMenuItem GetMenuItem(string txt, Image img=null)
        {
            ToolStripMenuItem menuItem = new ToolStripMenuItem();
            menuItem.Text = txt;
            menuItem.Image = img;
            return menuItem;
        }
        private void BindMenu()
        {
            ToolStripMenuItem menu0 = GetMenuItem("一級1");
            ToolStripMenuItem menu01 = GetMenuItem("二級11");
            ToolStripMenuItem menu02 = GetMenuItem("二級12");
            menu01.Click += new EventHandler(toolStripMenuItem_Click);//新增事件
            menu0.DropDownItems.Add(menu01);
            menu0.DropDownItems.Add(menu02);
            contextMenuStrip1.Items.Add(menu0);
            ToolStripMenuItem menu1 = GetMenuItem("一級2");
            ToolStripMenuItem menu11 = GetMenuItem("二級21");
            ToolStripMenuItem menu12 = GetMenuItem("二級22");
            menu1.DropDownItems.Add(menu11);
            menu1.DropDownItems.Add(menu12);
            contextMenuStrip1.Items.Add(menu1);
        }
        private void Form1_Click(object sender, EventArgs e)
        {
            if (((MouseEventArgs)e).Button == MouseButtons.Right)
            {
                Point p = MousePosition;//取得滑鼠位置
                contextMenuStrip1.Close();
                contextMenuStrip1.Show(p);//顯示右鍵選單
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            BindMenu();
        }
    }
}