C# 爬虫：疫情实时信息图

Posted 2021-06-29 dotNET跨平台

运行结果：

using System;
using System.Drawing;
using System.Text;
using NSoup;
using NSoup.Nodes;
using System.IO;
using System.Net;
using System.Text.RegularExpressions;
using System.Windows.Forms;


namespace Pneumonia
{
    public partial class MainForm : DevComponents.DotNetBar.OfficeForm
    {
        static string confirmedCount, suspectedCount, deadCount, curedCount, updateTime,dataUpdateTime;
        static string url = "https://3g.dxy.cn/newh5/view/pneumonia";
        static int count = 0;
        static Document doc;
        public MainForm()
{
            this.EnableGlass = false;
            InitializeComponent();
            this.SizeChanged += new Resize(this).Form1_Resize;  //窗口自适应代码
        }
        private void MainForm_Load(object sender, EventArgs e)
{
            timer1.Enabled = true;
            timer1.Interval = 1;
            timer1.Start();
            WebClient wc = new WebClient();
           byte[] htmlData = wc.DownloadData(url);
           string html = Encoding.UTF8.GetString(htmlData);
           logWrite(html);//将网页内容写入txt文件，以方便查看
           toolStripStatusLabel1.Text = DateTime.Now.ToString();
        }
        private void timer1_Tick(object sender, EventArgs e)
{
            dataUpdateTime = DateTime.Now.ToString();
            count++;
            timer1.Interval = 300000;
            GetData();
            lbl1.Text = "☛ 病毒: " + regularMatchStr("getStatisticsService", "virus\\":\\"(.+?)\\",");
            lbl2.Text = "☛ 传染源: " + regularMatchStr("getStatisticsService", "infectSource\\":\\"(.+?)\\",");
            lbl3.Text = "☛ 传播途径: " + regularMatchStr("getStatisticsService", "passWay\\":\\"(.+?)\\",");
            lbl4.Text ="☛ "+regularMatchStr("getStatisticsService", "remark1\\":\\"(.+?)\\",");
            lbl5.Text ="☛ "+regularMatchStr("getStatisticsService", "remark2\\":\\"(.+?)\\",");
            Image map =UrlToImage("https://img1.dxycdn.com/2020/0201/450/3394153392393266839-135.png");
            pictureBox1.Image = map;
            Image chart = UrlToImage("https://img1.dxycdn.com/2020/0201/693/3394145745204021706-135.png");
            pictureBox2.Image = chart;
            updateTimeLbl.Text = "截至 " + updateTime + " 全国数据统计";
            confirmedLbl.Text = confirmedCount;
            suspectedLbl.Text = suspectedCount;
            deadLbl.Text = deadCount;
            curedLbl.Text = curedCount;
        }


        public static void GetData()
{
            //直接通过url来获取Document对象
            doc = NSoupClient.Connect(url).Get();
            //先获取id为artContent的元素，再获取所有的p标签
            updateTime = ConvertStringToDateTime(regularMatchStr("getStatisticsService", "modifyTime\\":(.+?),")).ToString();
            confirmedCount = regularMatchStr("getStatisticsService", "confirmedCount\\":(.+?),");
            suspectedCount = regularMatchStr("getStatisticsService", "suspectedCount\\":(.+?),");
            deadCount = regularMatchStr("getStatisticsService", "deadCount\\":(.+?),");
            curedCount = regularMatchStr("getStatisticsService", "curedCount\\":(.+?),");
        }
        #region 下载图片到Image
        public static Image UrlToImage(string url)
{
            WebClient mywebclient = new WebClient();
            byte[] Bytes = mywebclient.DownloadData(url);
            using (MemoryStream ms = new MemoryStream(Bytes))
            {
                Image outputImg = Image.FromStream(ms);
                return outputImg;
            }
        }
        #endregion
        public static DateTime ConvertStringToDateTime(string timeStamp)
{
            DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
            long lTime = long.Parse(timeStamp + "0000");
            TimeSpan toNow = new TimeSpan(lTime);
            return dtStart.Add(toNow);
        }
        public static string regularMatchStr(string elementId, string regex)
{
            Element p = doc.GetElementById(elementId);
            Regex reg = new Regex(regex, RegexOptions.IgnoreCase);
            //例如我想提取line中的NAME值
            Match match = reg.Match(p.Html());
            string value = match.Groups[1].Value;
            return value;
        }
        public static void logWrite(string Message)
{
            if (!File.Exists(AppDomain.CurrentDomain.BaseDirectory + "\\\\log.txt"))
                File.Create(AppDomain.CurrentDomain.BaseDirectory + "\\\\log.txt").Close();
            string fileName = AppDomain.CurrentDomain.BaseDirectory + "\\\\log.txt";
            string content = DateTime.Now.ToLocalTime() + Message + "\\r\\n";
            StreamWriter sw = new StreamWriter(fileName, true);
            sw.Write(content);
            sw.Close(); sw.Dispose();
        }


        private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
{
            if (e.Button == MouseButtons.Left)//判断鼠标的按键            
            {
                //点击时判断form是否显示,显示就隐藏,隐藏就显示               
                if (this.WindowState == FormWindowState.Normal)
                {
                    this.WindowState = FormWindowState.Minimized;
                    this.Hide();
                }
                else if (this.WindowState == FormWindowState.Minimized)
                {
                    this.Show();
                    this.WindowState = FormWindowState.Normal;
                    this.Activate();
                }
            }
            else if (e.Button == MouseButtons.Right)
            {
                //右键退出事件                
                if (MessageBox.Show("是否需要关闭程序？", "提示:", MessageBoxButtons.OKCancel, MessageBoxIcon.Exclamation) == DialogResult.OK)//出错提示                
                {
                    //关闭窗口                    
                    DialogResult = DialogResult.No;
                    Dispose();
                    Close();
                }
            }


        }


        private void timer2_Tick(object sender, EventArgs e)
{
            toolStripStatusLabel1.Text = DateTime.Now.ToString() + "  刷新次数 : " + count + "  最新刷新时间 ：" + dataUpdateTime;
        }


        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
            if (MessageBox.Show("是否确认退出程序？", "退出", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
            {
                // 关闭所有的线程
                this.Dispose();
                this.Close();
            }
            else
            {
                e.Cancel = true;
            }
        }


        private void MainForm_SizeChanged(object sender, EventArgs e)
{
            //判断是否选择的是最小化按钮
            if (WindowState == FormWindowState.Minimized)
            {
                //隐藏任务栏区图标
                this.ShowInTaskbar = false;
                //图标显示在托盘区
                notifyIcon1.Visible = true;
            }
        }


        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("是否确认退出程序？", "退出", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
            {
                // 关闭所有的线程
                this.Dispose();
                this.Close();
            }
        }


        private void 显示ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            WindowState = FormWindowState.Normal;
        }


    }
}

resize类

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace Pneumonia
{
    class Resize
    {
        private MainForm _form;


        public Resize(MainForm form)
        {
            int count = form.Controls.Count * 2 + 2;
            float[] factor = new float[count];
            int i = 0;
            factor[i++] = form.Size.Width;
            factor[i++] = form.Size.Height;
            foreach (Control ctrl in form.Controls)
            {
                factor[i++] = ctrl.Location.X / (float)form.Size.Width;
                factor[i++] = ctrl.Location.Y / (float)form.Size.Height;
                ctrl.Tag = ctrl.Size;
            }
            form.Tag = factor;
            this._form = form;
        }


        public void Form1_Resize(object sender, EventArgs e)
        {
            float[] scale = (float[])this._form.Tag;
            int i = 2;
            foreach (Control ctrl in this._form.Controls) //panel的长宽增长到一个固定的值就不会再增长了，原因：Panel的宽和高上限是65535像素（https://blog.csdn.net/dufangfeilong/article/details/41805073?utm_source=blogxgwz5）
            {
                ctrl.Left = (int)(this._form.Size.Width * scale[i++]);
                ctrl.Top = (int)(this._form.Size.Height * scale[i++]);
                ctrl.Width = (int)(this._form.Size.Width / (float)scale[0] * ((Size)ctrl.Tag).Width);
                ctrl.Height = (int)(this._form.Size.Height / (float)scale[1] * ((Size)ctrl.Tag).Height);
            }
        }
    }
}

C# Winform控件自适应窗体大小：方法1（推荐）

需求：当窗体尺寸动态改变时，窗体中的各种控件（包括Panel以及Panel中的子控件）可以动态调节自身大小，以适应窗体内容比例。

方法：

第一步，新建一个类，代码如下：

class Resize
    {
        private Form _form;


        public Resize(Form form)
        {
            int count = form.Controls.Count * 2 + 2;
            float[] factor = new float[count];
            int i = 0;
            factor[i++] = form.Size.Width;
            factor[i++] = form.Size.Height;
            foreach (Control ctrl in form.Controls)
            {
                factor[i++] = ctrl.Location.X / (float)form.Size.Width;
                factor[i++] = ctrl.Location.Y / (float)form.Size.Height;
                ctrl.Tag = ctrl.Size;
            }
            form.Tag = factor;
            this._form = form;
        }


        public void Form1_Resize(object sender, EventArgs e)
        {
            float[] scale = (float[])this._form.Tag;
            int i = 2;
            foreach (Control ctrl in this._form.Controls) //panel的长宽增长到一个固定的值就不会再增长了，原因：Panel的宽和高上限是65535像素（https://blog.csdn.net/dufangfeilong/article/details/41805073?utm_source=blogxgwz5）
            {
                ctrl.Left = (int)(this._form.Size.Width * scale[i++]);
                ctrl.Top = (int)(this._form.Size.Height * scale[i++]);
                ctrl.Width = (int)(this._form.Size.Width / (float)scale[0] * ((Size)ctrl.Tag).Width);
                ctrl.Height = (int)(this._form.Size.Height / (float)scale[1] * ((Size)ctrl.Tag).Height);
            }
        }
    }
    第二步，在Form的初始化函数中使用这个类：
    public Form_StockCount()
        {
            InitializeComponent();


             this.SizeChanged += new Resize(this).Form1_Resize;  //窗口自适应代码
         }

C# Winform窗体和控件自适应大小：方法2

1.在项目中创建类AutoSizeForm

AutoSizeForm.cs文件代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace CSharpFormApplication
{
    class AutoResizeForm
    {
            //(1).声明结构,只记录窗体和其控件的初始位置和大小。
            public struct controlRect
            {
                public int Left;
                public int Top;
                public int Width;
                public int Height;
            }
            //(2).声明 1个对象
            //注意这里不能使用控件列表记录 List nCtrl;，因为控件的关联性，记录的始终是当前的大小。
            //      public List oldCtrl= new List();//这里将西文的大于小于号都过滤掉了，只能改为中文的，使用中要改回西文
            public List<controlRect> oldCtrl = new List<controlRect>();
            int ctrlNo = 0;//1;
            //(3). 创建两个函数
            //(3.1)记录窗体和其控件的初始位置和大小,
            public void controllInitializeSize(Control mForm)
            {
                controlRect cR;
                cR.Left = mForm.Left; cR.Top = mForm.Top; cR.Width = mForm.Width; cR.Height = mForm.Height;
                oldCtrl.Add(cR);//第一个为"窗体本身",只加入一次即可
                AddControl(mForm);//窗体内其余控件还可能嵌套控件(比如panel),要单独抽出,因为要递归调用
                //this.WindowState = (System.Windows.Forms.FormWindowState)(2);//记录完控件的初始位置和大小后，再最大化
                //0 - Normalize , 1 - Minimize,2- Maximize
            }
            private void AddControl(Control ctl)
            {
                foreach (Control c in ctl.Controls)
                {  //**放在这里，是先记录控件的子控件，后记录控件本身
                    //if (c.Controls.Count > 0)
                    //    AddControl(c);//窗体内其余控件还可能嵌套控件(比如panel),要单独抽出,因为要递归调用
                    controlRect objCtrl;
                    objCtrl.Left = c.Left; objCtrl.Top = c.Top; objCtrl.Width = c.Width; objCtrl.Height = c.Height;
                    oldCtrl.Add(objCtrl);
                    //**放在这里，是先记录控件本身，后记录控件的子控件
                    if (c.Controls.Count > 0)
                        AddControl(c);//窗体内其余控件还可能嵌套控件(比如panel),要单独抽出,因为要递归调用
                }
            }
            //(3.2)控件自适应大小,
            public void controlAutoSize(Control mForm)
            {
                if (ctrlNo == 0)
                { //*如果在窗体的Form1_Load中，记录控件原始的大小和位置，正常没有问题，但要加入皮肤就会出现问题，因为有些控件如dataGridView的的子控件还没有完成，个数少
                    //*要在窗体的Form1_SizeChanged中，第一次改变大小时，记录控件原始的大小和位置,这里所有控件的子控件都已经形成
                    controlRect cR;
                    //  cR.Left = mForm.Left; cR.Top = mForm.Top; cR.Width = mForm.Width; cR.Height = mForm.Height;
                    cR.Left = 0; cR.Top = 0; cR.Width = mForm.PreferredSize.Width; cR.Height = mForm.PreferredSize.Height;


                    oldCtrl.Add(cR);//第一个为"窗体本身",只加入一次即可
                    AddControl(mForm);//窗体内其余控件可能嵌套其它控件(比如panel),故单独抽出以便递归调用
                }
                float wScale = (float)mForm.Width / (float)oldCtrl[0].Width;//新旧窗体之间的比例，与最早的旧窗体
                float hScale = (float)mForm.Height / (float)oldCtrl[0].Height;//.Height;
                ctrlNo = 1;//进入=1，第0个为窗体本身,窗体内的控件,从序号1开始
                AutoScaleControl(mForm, wScale, hScale);//窗体内其余控件还可能嵌套控件(比如panel),要单独抽出,因为要递归调用
            }
            private void AutoScaleControl(Control ctl, float wScale, float hScale)
            {
                int ctrLeft0, ctrTop0, ctrWidth0, ctrHeight0;
                //int ctrlNo = 1;//第1个是窗体自身的 Left,Top,Width,Height，所以窗体控件从ctrlNo=1开始
                foreach (Control c in ctl.Controls)
                { //**放在这里，是先缩放控件的子控件，后缩放控件本身
                    //if (c.Controls.Count > 0)
                    //   AutoScaleControl(c, wScale, hScale);//窗体内其余控件还可能嵌套控件(比如panel),要单独抽出,因为要递归调用
                    ctrLeft0 = oldCtrl[ctrlNo].Left;
                    ctrTop0 = oldCtrl[ctrlNo].Top;
                    ctrWidth0 = oldCtrl[ctrlNo].Width;
                    ctrHeight0 = oldCtrl[ctrlNo].Height;
                    //c.Left = (int)((ctrLeft0 - wLeft0) * wScale) + wLeft1;//新旧控件之间的线性比例
                    //c.Top = (int)((ctrTop0 - wTop0) * h) + wTop1;
                    c.Left = (int)((ctrLeft0) * wScale);//新旧控件之间的线性比例。控件位置只相对于窗体，所以不能加 + wLeft1
                    c.Top = (int)((ctrTop0) * hScale);//
                    c.Width = (int)(ctrWidth0 * wScale);//只与最初的大小相关，所以不能与现在的宽度相乘 (int)(c.Width * w);
                    c.Height = (int)(ctrHeight0 * hScale);//
                    ctrlNo++;//累加序号
                    //**放在这里，是先缩放控件本身，后缩放控件的子控件
                    if (c.Controls.Count > 0)
                        AutoScaleControl(c, wScale, hScale);//窗体内其余控件还可能嵌套控件(比如panel),要单独抽出,因为要递归调用


                    if (ctl is DataGridView)
                    {
                        DataGridView dgv = ctl as DataGridView;
                        Cursor.Current = Cursors.WaitCursor;


                        int widths = 0;
                        for (int i = 0; i < dgv.Columns.Count; i++)
                        {
                            dgv.AutoResizeColumn(i, DataGridViewAutoSizeColumnMode.AllCells);  // 自动调整列宽  
                            widths += dgv.Columns[i].Width;   // 计算调整列后单元列的宽度和                       
                        }
                        if (widths >= ctl.Size.Width)  // 如果调整列的宽度大于设定列宽  
                            dgv.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.DisplayedCells;  // 调整列的模式 自动  
                        else
                            dgv.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;  // 如果小于 则填充  


                        Cursor.Current = Cursors.Default;
                    }
                }




            }
        }
    }
    2.在要自适应大小的Form中自定义全局类对象
 AutoResizeForm asc = new AutoResizeForm();
 3.在要自适应大小的Form的load事件和SizeChange事件中执行对象方法
 private void WidgetAutoResizeForm_Load(object sender, EventArgs e)
        {
            asc.controllInitializeSize(this);
        }


        private void WidgetAutoResizeForm_SizeChanged(object sender, EventArgs e)
        {
            asc.controlAutoSize(this);
        }
        From窗体代码：
     using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;


namespace CSharpFormApplication
{
    public partial class WidgetAutoResizeForm : Form
    {
        AutoResizeForm asc = new AutoResizeForm();
        public WidgetAutoResizeForm()
        {
            InitializeComponent();
        }


        private void WidgetAutoResizeForm_Load(object sender, EventArgs e)
        {
            asc.controllInitializeSize(this);
        }


        private void WidgetAutoResizeForm_SizeChanged(object sender, EventArgs e)
        {
            asc.controlAutoSize(this);
        }
    }
}