|
|
1  /**//// <summary>
2 /// 下载文件函数
3/// </summary>
4/// <param name="url">下载地址</param>
5/// <param name="Path">保存路径</param>
6 /// <param name="typeName">类型:文件或图片</param> 7 private bool DownFile(string url, string Path,string typeName)
8  {
9 try
10  {
11 HttpWebRequest objHttpWebRequest;
12 HttpWebResponse objHttpWebResponse;
13 try
14 {
15 objHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);//send
16 objHttpWebResponse = (HttpWebResponse)objHttpWebRequest.GetResponse();//get
17 objHttpWebRequest.AllowAutoRedirect = true;
18 }
19 catch
20 {
21 return false;
22 }
23
24
25 string AbsoluteUri = objHttpWebResponse.ResponseUri.AbsoluteUri;//It may be Redirect so is necessary to use the AbsoluteUri
26 string Extend = AbsoluteUri.Substring(AbsoluteUri.LastIndexOf(".") + 1);
27
28
29 string GuidName = Guid.NewGuid().ToString();
30 Path = Path + GuidName.Substring(0, 1);
31
32
33 DirectoryInfo objDirectoryInfo = new DirectoryInfo(Path);
34 if (objDirectoryInfo.Exists)
35 {
36
37 }
38 else
39 {
40 objDirectoryInfo.Create();
41 }
42
43
44
45 string FullName = Path + "\\" + GuidName + "." + Extend;
46
47
48 Stream objStream = objHttpWebResponse.GetResponseStream();
49
50 Byte[] buffer = new Byte[256];
51
52 int bufferSizeCount = objStream.Read(buffer, 0, 256);
53
54 FileStream objFileStream = new FileStream(FullName, FileMode.Create, FileAccess.Write);
55
56 int sumBufferSizeCount = 0;
57
58 while (bufferSizeCount > 0)
59 {
60 Application.DoEvents();
61
62 objFileStream.Write(buffer, 0, bufferSizeCount);//
63 bufferSizeCount = objStream.Read(buffer, 0, 256);//
64 sumBufferSizeCount += bufferSizeCount;//
65 this.Text = string.Format("[总进度{0}/{1}] 下载进度{2}文件:{3}K {4}",currentIndex,totalCount, Extend, sumBufferSizeCount / 1024,sumBufferSizeCount);
66 }
67
68 objStream.Close();
69 objFileStream.Close();
70 objHttpWebResponse.Close();
71
72
73 FileInfo objFileInfo = new FileInfo(FullName);
74 int FileSize = Convert.ToInt32(objFileInfo.Length / 1024);
75
76 if (typeName == "image")
77 {
78 ImageFileName = GuidName;
79 ImageExtend = Extend;
80 ImageFileSize = FileSize;
81
82 if (File.Exists(FullName))
83 {
84 System.Drawing.Image image = System.Drawing.Image.FromFile(FullName);
85
86 this.pictureBox1.Image = image;
87 }
88
89 }
90 else if(typeName == "file")
91 {
92 FileFileName = GuidName;
93 FileExtend = Extend;
94 FileFileSize = FileSize;
95 }
96
97 this.Refresh();
98
99 return true;
100
101 }
102 catch
103 {
104 return false;
105 }
106
107 }
|