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C# string 转 byte[]

时间:2018-08-14 13:09:14      阅读:163      评论:0      收藏:0      [点我收藏+]

string 转 byte[]

        /// <summary>
        /// string 转 byte
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        byte[] Str_change_byte(string str)
        {
            byte[] Data = new byte[str.Length];
            int count = 0;
            string strSource = str.Replace("\n", "").Replace(" ", "").Replace("\t", "").Replace("\r", "");

            try
            {
                for (int i = 0; i < (strSource.Length - strSource.Length % 2) / 2; i++)//取余3运算作用是防止用户输入的字符为奇数个
                {
                    Data[count] = Convert.ToByte(strSource.Substring(i * 2, 2), 16);
                    count++;
                }
                if (strSource.Length % 2 != 0)//剩下一位单独处理
                {
                    Data[count] = Convert.ToByte(strSource.Substring(strSource.Length - 1, 1), 16);//单独处理B(0B)
                    count++;
                }
            }
            catch (Exception)
            {
                MessageBox.Show("Error:数据包含非法字符\n", "错误:", MessageBoxButtons.OK, MessageBoxIcon.Error);//出错提示
                return null;
            }
            byte[] buf = new byte[count];
            Array.Copy(Data, 0, buf, 0, count); //复制原始数据    
            return buf;
        }

 以下内容为转载:

https://www.cnblogs.com/Maxq/p/5953682.html

string类型转成byte[]:

byte[] byteArray = System.Text.Encoding.Default.GetBytes ( str );

byte[]转成string:

string str = System.Text.Encoding.Default.GetString ( byteArray );

 

string类型转成ASCII byte[]:

("01" 转成 byte[] = new byte[]{ 0x30,0x31})

byte[] byteArray = System.Text.Encoding.ASCII.GetBytes ( str );

ASCIIbyte[]转成string:

(byte[] = new byte[]{ 0x30, 0x31} 转成"01")

string str = System.Text.Encoding.ASCII.GetString ( byteArray );

byte[]转16进制格式string:

new byte[]{ 0x30, 0x31}转成"3031":

publicstaticstring ToHexString ( byte[] bytes ) // 0xae00cf => "AE00CF "
{
string hexString = string.Empty; if ( bytes != null ) { StringBuilder strB = new StringBuilder (); for ( int i = 0; i < bytes.Length; i++ ) { strB.Append ( bytes[i].ToString ( "X2" ) ); } hexString = strB.ToString (); }return hexString;
}

 

 

16进制格式string 转byte[]:

publicstaticbyte[] GetBytes(string hexString, outint discarded)

{            

discarded = 0;

string newString = "";

char c;// remove all none A-F, 0-9, charactersfor (int i=0; i<hexString.Length; i++)

{              

  c = hexString[i];if (IsHexDigit(c))                    

newString += c;

else                    

discarded++;            

}// if odd number of characters, discard last characterif (newString.Length % 2 != 0){                discarded++;                

newString = newString.Substring(0, newString.Length-1);            }

int byteLength = newString.Length / 2;byte[] bytes = newbyte[byteLength];string hex;int j = 0;for (int i=0; i<bytes.Length; i++){               

 hex = new String(new Char[] {newString[j], newString[j+1]});               

 bytes[i] = HexToByte(hex);                j = j+2;           

 }

return bytes;       

 }

 

C# string 转 byte[]

原文:https://www.cnblogs.com/huanjun/p/9473663.html

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