c#十六进制字符串hex转byte数组互…

private void button1_Click(object sender, EventArgs e)

{

Bitmap b = new Bitmap(@"c:\1.bmp");

MemoryStream ms = new MemoryStream();

b.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);

bytes = ms.GetBuffer(); //byte[] bytes= ms.ToArray(); 这两句都可以，至于区别么，下面有解释

//byte[] bytes =ms.ToArray();

ms.Close();

for (int i = 0; i < bytes.Length; i++)

{

textBox1.Text += bytes[i].ToString("x2");

}

}

private void button2_Click(object sender, EventArgs e)

{

MemoryStream ms = new MemoryStream(bytes);

Image returnImage = Image.FromStream(ms);

pictureBox1.Image = returnImage;

}

//=================================================

///
/// 字符串转16进制字节数组
///
///
///
private static byte[] strToToHexByte(string hexString)
{
hexString = hexString.Replace(" ", "");
if ((hexString.Length % 2) != 0)
hexString += " ";
byte[] returnBytes = new byte[hexString.Length / 2];
for (int i = 0; i < returnBytes.Length; i++)
returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
return returnBytes;
}
字节数组转16进制字符串
///
/// 字节数组转16进制字符串
///
///
///
public static string byteToHexStr(byte[] bytes)
{
string returnStr = "";
if (bytes != null)
{
for (int i = 0; i < bytes.Length; i++)
{
returnStr += bytes[i].ToString("X2");
}
}
return returnStr;
}
从汉字转换到16进制
///
/// 从汉字转换到16进制
///
///
/// 编码,如"utf-8","gb2312"
/// 是否每字符用逗号分隔
///
public static string ToHex(string s, string charset, bool fenge)
{
if ((s.Length % 2) != 0)
{
s += " ";//空格
//throw new ArgumentException("s is not valid chinese string!");
}
System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
byte[] bytes = chs.GetBytes(s);
string str = "";
for (int i = 0; i < bytes.Length; i++)
{
str += string.Format("{0:X}", bytes[i]);
if (fenge && (i != bytes.Length - 1))
{
str += string.Format("{0}", ",");
}
}
return str.ToLower();
}
16进制转换成汉字
///
/// 从16进制转换成汉字
///
///
/// 编码,如"utf-8","gb2312"
///
public static string UnHex(string hex, string charset)
{
if (hex == null)
throw new ArgumentNullException("hex");
hex = hex.Replace(",", "");
hex = hex.Replace("\n", "");
hex = hex.Replace("\\", "");
hex = hex.Replace(" ", "");
if (hex.Length % 2 != 0)
{
hex += "20";//空格
}
// 需要将 hex 转换成 byte 数组。
byte[] bytes = new byte[hex.Length / 2];
for (int i = 0; i < bytes.Length; i++)
{
try
{
// 每两个字符是一个 byte。
bytes[i] = byte.Parse(hex.Substring(i * 2, 2),
System.Globalization.NumberStyles.HexNumber);
}
catch
{
// Rethrow an exception with custom message.
throw new ArgumentException("hex is not a valid hex number!", "hex");
}
}
System.Text.Encoding chs = System.Text.Encoding.GetEncoding(charset);
return chs.GetString(bytes);
}