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  • 淘小宝相册下载工具v2.0开发手记

    图1:软件界面

    软件用途:
    这个小软件主要目的是为了方便批量下载淘小宝网络相册中的图片。
    因为这个相册是收费的,空间有限,做服装等类型网店的朋友手中的产品图片往往过多,如果空间容量不够,解决办法当然是把过季的服装图片下载下来保存到硬盘上,再删除相册中的图片以节约空间。

    目前淘宝店铺用得较广泛的支持外链的相册有:淘小宝,巴比豆,淘宝自己的相册空间,拍拍乐则已经倒闭了。

    这个小程序很简单,原理无非是用正则式分析链接,然后按链接地址把图片下载下来。
    以前开发的V1.0是易语言写的,有些用户报毒,我也很无耐,在易语言静态编译出来之前,这个是易语言的癌症。
    所以现在V2.0换成了C#编写,彻底没有了这种烦恼。

    代码如下,已经详细注释,不在浪费口条了:

    namespace WindowsFormsApplication1
    {
        public partial class Form1 : Form
        {
            //静态变量
            static String foldername = null; //保存用户输入的保存图片文件夹名称
            static int oversum = 0; //保存已经完成下载的计数
            static DateTime beginT; //下载开始的起始计时,用于完成下载统计总用时

            //用于更新标签文字的委托
            public delegate void delegateHandle(String msg1);
            public delegateHandle myDelegate;
            //用于更新进度条的委托
            public delegate void delegateHandle1(int value1);
            public delegateHandle1 myDelegate1;
           
            public Form1()
            {
                InitializeComponent();
                //绑定委托的成员函数
                myDelegate = new delegateHandle(refreshLable1);
                myDelegate1 = new delegateHandle1(refreshProgress1);
            }

            //委托成员函数refreshLable1
            p rivate void refreshLable1(String msg1)
            {
               this.label1.Text=msg1;
            }

            //委托成员函数refreshProgress1
            p rivate void refreshProgress1(int value1)
            {
                progressBar1.Value = value1;
                if (progressBar1.Maximum == oversum) //如果计数到达进度条最大值则转完成处理
                {
                    //下载按钮恢复可用
                    button1.Enabled = true;
                    //静态变量清场
                    foldername = null;
                    oversum = 0;

                    //更新lable1
                    this.label1.Invoke(this.myDelegate, new object[] { "所有图片下载完成!耗时:"+DateTime.Now.Subtract(beginT)});

                }
            }
          
            p rivate void button2_Click(object sender, EventArgs e)
            {
                //用户点击帮助按钮
                Help.ShowHelp(this, "http://www.hackpig.cn/post/36.html");
            }

            p rivate void button1_Click(object sender, EventArgs e)
            {
                if (textBox1.Text.Length < 10)
                {
                    MessageBox.Show("没有输入链接地址,或者输入非法!");
                    return;
                }

               
                foldername = Interaction.InputBox("请输入保存图片文件夹名称", "提示", "temp", this.Top, this.Left);
                if (foldername == "")
                {
                    return;
                }
                //Debug.WriteLine(foldername);
                //创建目录
                foldername = Application.StartupPath + "\\" + foldername;
                try
                {
                    Directory.CreateDirectory(foldername);
                }
                catch (Exception m)
                {
                    MessageBox.Show(m.Message);
                    return;
                }

                //下载按钮变灰
                button1.Enabled = false;
                //记录下载开始时间
                beginT = DateTime.Now;


                //正则式分析链接
                String imgurl = null;
                int s1 = 0;
                int s2 = 0;

                MatchCollection m1 = Regex.Matches(textBox1.Text, @"<\w+\s+src=(?<url>[\w\.\d:/]*)>", RegexOptions.IgnoreCase);
                //设置进度条最大值
                this.progressBar1.Maximum = m1.Count;

                //控制线程数量
                if (checkBox1.Checked)
                {
                    s1 = 20; s2 = 20;
                }
                else
                {
                    s1 = 1; s2 = 1;
                }
                //置线程池最大线程数
                ThreadPool.SetMaxThreads(s1, s2);

                foreach (Match m in m1)
                {
                    imgurl = m.Groups["url"].ToString();
                    ThreadPool.QueueUserWorkItem(new WaitCallback(dowork), (object)imgurl);
                }
               
            }
          
            //线程池回调函数dowork
            p rivate void dowork(object url)
            {
                WebClient web1 = new WebClient();
                //从链接取图片链接名
                //http://www21.tx8.cn/photo/youran362/201012094446744.jpg
                String linkurl = (String)url;
                String imgname = null;

                try
                {
                    int pi = linkurl.LastIndexOf("/", StringComparison.InvariantCultureIgnoreCase) + 1;
                    imgname = foldername + "\\" + linkurl.Substring(pi, linkurl.Length - pi);
                    //Debug.WriteLine(imgname);

                    web1.DownloadFile(linkurl, imgname);
                    Debug.WriteLine(linkurl);
                    Debug.WriteLine(Thread.CurrentThread.ManagedThreadId);
                    Debug.WriteLine(DateTime.Now.ToString("mm:ss"));

                    //更新UI的Lable1标签文本
                    String msg1 = linkurl.Substring(pi, linkurl.Length - pi) + "下载完成!";
                    this.label1.Invoke(this.myDelegate, new object[] { msg1 });
                    //更新UI进度条
                    ++oversum;
                    this.progressBar1.Invoke(this.myDelegate1, new object[] { oversum });
                }
                catch (Exception e2)
                {
                    MessageBox.Show(e2.Message);
                }

            }

        }
    }
     

    下载淘小宝相册下载工具

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  • 原文地址:https://www.cnblogs.com/hackpig/p/1668488.html
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