1 /// <summary>
2 /// 验证上传文件真实格式
3 /// </summary>
4 /// <param name="fileUpload"></param>
5 /// <returns></returns>
6 private bool ValidationFile(HttpPostedFile fileUpload)
7 {
8 HttpPostedFile file = fileUpload;
9 BinaryReader r = new BinaryReader(fileUpload.InputStream);
10 string bx = " ";
11 byte buffer;
12 try
13 {
14 buffer = r.ReadByte();
15 bx = buffer.ToString();
16 buffer = r.ReadByte();
17 bx += buffer.ToString();
18 }
19 catch (Exception)
20 {
21 Response.Write("文件格式错误！");
22 Response.End();
23 }
24
25 bool isok = false;
26 foreach (int item in Enum.GetValues(typeof(FileExtension)))
27 {
28 if (item.ToString() == bx)
29 {
30 isok = true;
31 break;
32 }
33 }
34
35 return isok;
36 }
37
38 /// <summary>
39 /// 上传文件的真实格式
40 /// </summary>
41 public enum FileExtension
42 {
43 JPG = 255216,
44 GIF = 7173,
45 BMP = 6677,
46 PNG = 13780
47 //COM = 7790,
48 //EXE = 7790,
49 //DLL = 7790,
50 //RAR = 8297,
51 //ZIP = 8075,
52 //XML = 6063,
53 //HTML = 6033,
54 //ASPX = 239187,
55 //CS = 117115,
56 //JS = 119105,
57 //TXT = 210187,
58 //SQL = 255254,
59 //BAT = 64101,
60 //BTSEED = 10056,
61 //RDP = 255254,
62 //PSD = 5666,
63 //PDF = 3780,
64 //CHM = 7384,
65 //LOG = 70105,
66 //REG = 8269,
67 //HLP = 6395,
68 //DOC = 208207,
69 //XLS = 208207,
70 //DOCX = 208207,
71 //XLSX = 208207,
72 //txt:4950
73 }
