WinForm制作定时显示基金净值的桌面小工具

基金网每隔一分钟会更新净值估算，每次要打开网站看挺麻烦的，于是制作了一个桌面小工具，在桌面顶层并且透明显示，每隔一分钟抓取数据显示。
净值估算例子如下：
http://fund.eastmoney.com/000167.html

开发完成后的结果如下：

开发过程：

1、参考了“.net winForm 实现类似qq 弹出新闻一文”的窗体美化效果，放了两个Panel当背景和标题栏

http://www.cnblogs.com/echosong/p/3500563.html

2、在中间放一个Label显示信息、在工具栏拉一个ContextMenuStrip和NotifyIcon作为最小化到托盘时的显示和退出菜单操作，其中notifyIcon1的ContextMenuStrip属性设为contextMenuStrip1,Icon属性设为本地一个IOCN图标文件。

3、通过HtmlAgilityPack解析html源码得到所需的数据。

<div id="statuspzgz" class="fundpz"><span class="green bold">1.1843</span><div id="statuszdf" class="fundzf"><p class="green">-0.0067</p><p class="green">-0.56%</p></div><p class="time">2014-03-06 15:00</p></div>

解析用到的路径为：
//div[@id='statuspzgz']/span
//div[@id='statuszdf']/p[1]
//div[@id='statuszdf']/p[2]
//div[@id='statuspzgz']/p[@class='time']

完整代码如下：

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;using HtmlAgilityPack;using System.Threading.Tasks;using System.Threading;using System.Runtime.InteropServices;namespace Demo{    public partial class Form8 : Form    {        const string url = "http://fund.eastmoney.com/000167.html";        public Form8()        {            InitializeComponent();            lblInfo.Text = "";                       this.ShowInTaskbar = false;//任务栏不显示            this.Opacity = 0.60;//透明度            this.TopMost = true;//顶层显示            Task.Factory.StartNew(() => Do(cts));        }               CancellationTokenSource cts = new CancellationTokenSource();              private void Do(CancellationTokenSource cts)        {            while (!cts.IsCancellationRequested)            {                string html = Utils.GetHtmlSource(url, Encoding.UTF8);                if (string.IsNullOrEmpty(html)) return;                HtmlNode rootNode = null;                HtmlAgilityPack.HtmlDocument document = new HtmlAgilityPack.HtmlDocument();                document.LoadHtml(html);                rootNode = document.DocumentNode;                string s1 = GetNodeText(rootNode, "//div[@id='statuspzgz']/span");                string s2 = GetNodeText(rootNode, "//div[@id='statuszdf']/p[1]");                string s3 = GetNodeText(rootNode, "//div[@id='statuszdf']/p[2]");                string s4 = GetNodeText(rootNode, "//div[@id='statuspzgz']/p[@class='time']");                this.SafeCall(() =>               {                   lblInfo.Text = s1 + "\r\n" + s2 + "\r\n" + s3 + "\r\n" + s4;               });               Thread.Sleep(1000 * 60); //每隔60s查询            }        }        private string GetNodeText(HtmlNode rootNode, string path)        {            HtmlNode temp = rootNode.SelectSingleNode(path);            if (temp != null)                return temp.InnerText;            return "";        }        [DllImport("user32.dll")]        //方法扑捉        public static extern bool ReleaseCapture();        [DllImport("user32.dll")]        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);        public const int WM_SYSCOMMAND = 0x0112;        public const int SC_MOVE = 0xF010;        public const int HTCAPTION = 0x0002;        void Panel2MouseDown(object sender, MouseEventArgs e)        {            //扑捉事件            ReleaseCapture();            //发送消息给window Api 来实现            SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);//        }        private void label2_Click(object sender, EventArgs e)        {            Application.Exit();        }        /// <summary>          /// 隐藏窗体，并显示托盘图标          /// </summary>          private void HideForm()        {            this.Visible = false;            this.WindowState = FormWindowState.Minimized;            notifyIcon1.Visible = true;        }        /// <summary>          /// 显示窗体          /// </summary>          private void ShowForm()        {            this.Visible = true;            this.WindowState = FormWindowState.Normal;            notifyIcon1.Visible = false;        }        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)        {            ShowForm();        }        private void ToolStripMenuItemShow_Click(object sender, EventArgs e)        {            ShowForm();        }        private void toolStripMenuItemExit_Click(object sender, EventArgs e)        {            Application.Exit();        }        private void label1_Click(object sender, EventArgs e)        {            HideForm();        }    }}

其中GetHtmlSource方法可以参考另一文章：

C#采集CSDN单个博客所有文章
http://blog.csdn.net/gdjlc/article/details/11620915