[转]GSM短信收发设备开发之短信编码格式 - 深圳市未来时代科技有限公司

///<summary>
/// 计算消息长度
///</summary>
///<param name="_phoneNumber">Phone</param>
///<param name="_targetText">Context</param>
///<returns></returns>
publicstaticstring CountSMSLength(string _phoneNumber, string _targetText)
{
if (!(_phoneNumber.Substring(0, 2) =="86"))
{
_phoneNumber = String.Format("86{0}", _phoneNumber); //检查手机号是否按标准格式书写，不是，就补上“”
}
return (8+ ((_phoneNumber.Length %2) ==0? _phoneNumber.Length /2 : (_phoneNumber.Length +1) /2) + _targetText.Length *2).ToString();
}
///<summary>
/// 对整个要发送的短信的PDU编码
///</summary>
///<param name="cscaNumber"></param>
///<param name="PhoneNumber"></param>
///<param name="TargetText"></param>
///<returns></returns>
publicstaticstring PDUEncodingSMS(string _cscaNumber, string _phoneNumber, string _targetText)
{
if (!(_cscaNumber.Substring(0, 2) =="86"))
{
_cscaNumber = String.Format("86{0}", _cscaNumber); //检查手机号是否按标准格式书写，不是，就补上“”
}
if (!(_phoneNumber.Substring(0, 2) =="86"))
{
_phoneNumber = String.Format("86{0}", _phoneNumber); //检查手机号是否按标准格式书写，不是，就补上“”
}
//开始号码
StringBuilder _sb =new StringBuilder();
_sb.Append("0891");
//短信中心
_sb.Append(ReversalNumber(_cscaNumber));
_sb.Append("1100"+ String.Format("{0,2:X}", _phoneNumber.Length).Replace('', '0') +"91");
//目标号码
_sb.Append(ReversalNumber(_phoneNumber));
//协议标识，编码信息和有效期
_sb.Append("0008FF");//+ String.Format("{0,2:X}", TargetText.Length * 2).Replace(' ', '0'));
//短信长度和内容
_sb.Append(ContentEncoding(_targetText));
return _sb.ToString();
}
///<summary>
/// 手机号码的编码
///</summary>
///<param name="Target"></param>
///<returns></returns>
publicstaticstring ReversalNumber(string _phone)
{
string _strResult =string.Empty;
if (!(_phone.Substring(0, 2) =="86"))
{
_phone = String.Format("86{0}", _phone); //检查手机号是否按标准格式书写，不是，就补上“”
}
char[] _eachnumber = (_phone.Length %2==0) ? Convert.ToString(_phone).ToCharArray() : Convert.ToString(_phone +"F").ToCharArray();
for (int i =0; i < _eachnumber.Length -1; i +=2)
{
_strResult += (_eachnumber[i +1].ToString() + _eachnumber[i].ToString());
}
return _strResult;
}
///<summary>
/// 短信内容的编码
///</summary>
///<param name="srvContent"></param>
///<returns></returns>
publicstaticstring ContentEncoding(string _srvContent)
{
Encoding encodingUTF = System.Text.Encoding.BigEndianUnicode;
string s =string.Empty;
byte[] encodedBytes = encodingUTF.GetBytes(_srvContent);
for (int i =0; i < encodedBytes.Length; i++)
{
s += BitConverter.ToString(encodedBytes, i, 1);
}
s = String.Format("{0:X2}{1}", s.Length /2, s);
return s;
}

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