winform WebBrowser 文件下载拦截获取文件本地保存路径

  1 public partial class WebBrowserForm : Form
  2     {
  3         WebClient client;
  4         SHDocVw.WebBrowser wb;
  5         private delegate bool IncreaseHandle(int nValue);
  6         //进度条窗口
  7         private ProcessBar myProcessBar = null;
  8         //声明委托对象
  9         private IncreaseHandle myIncrease = null;
10
11         public WebBrowserForm()
12         {
13             InitializeComponent();
14             wb = this.webBrowser1.ActiveXInstance as SHDocVw.WebBrowser;
15             wb.FileDownload += new SHDocVw.DWebBrowserEvents2_FileDownloadEventHandler(wb_FileDownload);
16             wb.NewWindow2 += new SHDocVw.DWebBrowserEvents2_NewWindow2EventHandler(wb_NewWindow2);
17         }
18
19         private void btnShow_Click(object sender, EventArgs e)
20         {
21             try
22             {
23                 if (!String.IsNullOrEmpty(txtUrl.Text.Trim()))
24                 {
25                     Uri url = new Uri(txtUrl.Text.Trim());
26                     webBrowser1.Url = url;
27                 }
28             }
29             catch (Exception ex)
30             {
31                 MessageBox.Show(ex.Message);
32             }
33         }
34         private void wb_FileDownload(bool ActiveDocument, ref bool Cancel)
35         {
36             MessageBox.Show("下载开始");
37             client = new WebClient();
38             var url = wb.Document.ActiveElement.GetAttribute("href");
39             //判断是否为下载
40             if (UrlFilter(url))
41             {
42                 SaveFileDialog save = new SaveFileDialog();
43                 //save.InitialDirectory = Application.ExecutablePath;
44                 save.Filter = "All Files(*.*)|*.*";
45                 save.Title = "下载全文";
46                 save.OverwritePrompt = true;
47                 save.RestoreDirectory = true;
48                 save.ValidateNames = true;
49                 save.CheckPathExists = true;
50                 save.AddExtension = true;
51                 String fOldName = url.Split('/')[url.Split('/').Length - 1];
52                 if (!String.IsNullOrEmpty(fOldName))
53                 {
54                     save.FileName = fOldName;
55                 }
56                 if (save.ShowDialog() == DialogResult.OK)
57                 {
58                     //使用线程起动
59                     Thread thdSub = new Thread(new ThreadStart(ThreadFun));
60                     thdSub.Start();
61
62                     client.DownloadFile(url, save.FileName);
63                 }
64                 MessageBox.Show(save.FileName);
65                 Cancel = true;
66             }
67         }
68         private void wb_NewWindow2(ref object ppDisp, ref bool Cancel)
69         {
70             client = new WebClient();
71             var url = wb.Document.ActiveElement.GetAttribute("href");
72
73             if (UrlFilter(url))
74             {
75
76                 SaveFileDialog save = new SaveFileDialog();
77                 //save.InitialDirectory = Application.ExecutablePath;
78                 save.Filter = "All Files(*.*)|*.*";
79                 save.Title = "下载全文";
80                 save.OverwritePrompt = true;
81                 save.RestoreDirectory = true;
82                 save.ValidateNames = true;
83                 save.CheckPathExists = true;
84                 save.AddExtension = true;
85                 String fOldName = url.Split('/')[url.Split('/').Length - 1];
86                 if (!String.IsNullOrEmpty(fOldName))
87                 {
88                     save.FileName = fOldName;
89                 }
90                 if (save.ShowDialog() == DialogResult.OK)
91                 {
92                     //使用线程起动
93                     Thread thdSub = new Thread(new ThreadStart(ThreadFun));
94                     thdSub.Start();
95                     client.DownloadFile(url, save.FileName);
96                 }
97                 MessageBox.Show(save.FileName);
98                 Cancel = true;
99             }
100         }
101
102         #region process bar
103         private void ShowProcessBar()
104         {
105             myProcessBar = new ProcessBar();
106             // 初始化进度条委托
107             myIncrease = new IncreaseHandle(myProcessBar.Increase);
108             myProcessBar.StartPosition = FormStartPosition.CenterParent;
109             myProcessBar.ShowDialog();
110             myProcessBar = null;
111         }
112         private void ThreadFun()
113         {
114             //线程中的一个委托
115             MethodInvoker mi = new MethodInvoker(ShowProcessBar);
116             this.BeginInvoke(mi);//异步挨靠委托
117             //延时1秒显示窗口
118             Thread.Sleep(1000);
119
120             bool blnIncreased = false;
121             object objReturn = null;
122             //循环执行委托，直到返回值
123             do
124             {
125                 Thread.Sleep(50);
126                 objReturn = this.Invoke(this.myIncrease, new object[] { 2 });
127                 blnIncreased = (bool)objReturn;
128             }
129             while (blnIncreased);
130         }
131         #endregion
132
133         #region 过滤白名单
134         public Boolean UrlFilter(String url)
135         {
136             Boolean result = false;
137             url = url.ToLower();
138             String[] filters = { ".rar", ".zip", ".pdf", ".txt", ".xls", ".xlsx", ".ppt", ".doc", ".docx" };
139             foreach (String item in filters)
140             {
141                 if (url.EndsWith(item))
142                 {
143                     result = true;
144                     break;
145                 }
146             }
147             return result;
148         }
149         #endregion
150     }

前台用我们自己的System.Windows.Forms.WebBrowser.

winform WebBrowser 文件下载拦截 获取文件本地保存路径

winform WebBrowser 文件下载拦截获取文件本地保存路径