16进制字符和图片之间相互转换

图片和字符转换一版用在socket进行通信之间。现在我就把我写的和测试整理出来和大家分享下

1：图片转换成16进制字符

 1   FileStream fs = new FileStream(lbl_show.Text, FileMode.Open, FileAccess.Read);
 2             BinaryReader br = new BinaryReader(fs);
 3             StreamWriter sw = new StreamWriter(tb_position.Text);
 4             int length = (int)fs.Length;
 5             StringBuilder sb = new StringBuilder();
 6             while (length > 0)
 7             {
 8                 byte tempByte = br.ReadByte();
 9                 string tempStr = Convert.ToString(tempByte, 16);
10                 if (tempStr.Length <= 1)
11                 {
12                     tempStr = "0" + tempStr;
13                 }
14                 sb.Append(tempStr);
15                 length--;
16             }
17             sw.Write(sb.ToString());
18             fs.Close();
19             br.Close();
20             sw.Close();
21             MessageBox.Show("转换成功");

注释1：lbl_show.Text表示图片存在的位置

注释2：tb_position.Text表示字符保存位置

注释3：string tempStr = Convert.ToString(tempByte, 16); 字节转换成16进制字符串

2：16进制字符转换成图片

 1     FileStream fs = new FileStream("Imgs//test.jpg", FileMode.Create, FileAccess.Write);
 2             BinaryWriter bw = new BinaryWriter(fs);
 3             StreamReader sr = new StreamReader(lbl_text.Text);
 4             while (sr.Peek() != -1)
 5             {
 6                 string tempStr = sr.ReadToEnd();
 7                 if (tempStr.Contains("7D01") || tempStr.Contains("7D02"))
 8                 {
 9                     tempStr = tempStr.Replace("7D02", "7E");
10                     tempStr = tempStr.Replace("7D01", "7D");
11                 }
12                 int tlenth = tempStr.Length / 2;
13                 int pos = 0;
14                 string[] str = new string[tlenth];
15                 for (int i = 0; i < tlenth; i++)
16                 {
17                     str[i] = tempStr.Substring(pos, 2);
18                     pos = pos + 2;
19                     string cc = str[i];
20                     byte tempByte = Convert.ToByte(str[i], 16);
21                     bw.Write(tempByte);
22                 }
23             }
24             fs.Close();
25             bw.Close();
26             sr.Close();
27             this.pictureBox1.Image = Image.FromFile("Imgs//test.jpg");