1 public sealed class SocketData
2 {
3 private SocketData()
4 {
5 }
6
7 public static SendFileMode SendFile(Socket socket, string fileName, int maxBufferLength)
8 {
9 SendFileMode flag = SendFileMode.Success;
10 try
11 {
12 using (Stream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
13 {
14 long fileLength = fs.Length;
15 long leftLength = fileLength;
16 int readLength = 0;
17 byte[] buffer = null;
18 var file_name = System.IO.Path.GetFileName(fileName);
19 var bytefileName = System.Text.Encoding.UTF8.GetBytes(file_name + "|" + fs.Length);
20 socket.Send(bytefileName);
21 if (fileLength <= maxBufferLength)
22 { /* 文件可以一次读取*/
23 buffer = new byte[fileLength];
24 readLength = fs.Read(buffer, 0, (int)fileLength);
25 //开始发送
26 socket.Send(buffer, SocketFlags.None);
27 }
28 else
29 {
30 while (leftLength != 0)
31 {
32 if (leftLength < maxBufferLength)
33 {
34 buffer = new byte[leftLength];
35 readLength = fs.Read(buffer, 0, Convert.ToInt32(leftLength));
36 }
37 else
38 {
39 buffer = new byte[maxBufferLength];
40 readLength = fs.Read(buffer, 0, maxBufferLength);
41 }
42 //开始发送
43 socket.Send(buffer, SocketFlags.None);
44 leftLength -= readLength;
45 }
46 }
47 }
48 }
49 catch (IOException)
50 {
51
52 flag = SendFileMode.IOException;
53 }
54 return flag;
55 }
56 }
