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C# 字串轉BYTE陣列 、 BYTE陣列轉字串 和 BYTE陣列轉16進為字串     BYTE陣列轉16進為字串 public static bool ByteArray2String(byte[] pdata, ref String StrData, bool blnReverse = true)//陣列轉字串 { StrData = ""; bool blnResult = true; if (blnReverse == true) { Array.Reverse(pdata); } try { for (int i = 0; i < pdata.Length; i++) { StrData += Convert.ToString(pdata[i], 16).PadLeft(2, '0') + " "; } } catch { blnResult = false; } return blnResult; }  16進為字串轉BYTE陣列 public static bool String2ByteArray(byte[] pkey, String StrData, int iLen = 16) { bool blnResult = true; if (StrData.Length >= (iLen * 2)) { int j = 0; //for (int i = 0; i < StrData.Length; i += 2) for (int i = (StrData.Length - 2); i >= 0; i -= 2) { try { int buf = Convert.ToInt32(StrData.Substring(i, 2), 16); pkey[j] = Convert.ToByte(buf); j++; } catch { blnResult = false; break; } } } return blnResult; } string類型轉成byte[]： byte[] byteArray = System.Text.Encoding.Default.GetBytes ( str ); 反過來，byte[]轉成string： string str = System.Text.Encoding.Default.GetString ( byteArray ); string類型轉成ASCII byte[]：（”01″ 轉成 byte[] = new byte[]{ 0x30, 0x31}） byte[] byteArray = System.Text.Encoding.ASCII.GetBytes ( str ); ASCII byte[] 轉成string：（byte[] = new byte[]{ 0x30, 0x31} 轉成 “01”） string str = System.Text.Encoding.ASCII.GetString ( byteArray );