Encoding encoding = Encoding.GetEncoding("gb2312"); 与byte[] ping = Encoding.UTF8.GetBytes(inputString);区别
public static string SubString(string inputString, int length)
{
byte[] ping = Encoding.UTF8.GetBytes(inputString);
int count=Encoding.UTF8.GetByteCount(inputString);
if (count <= length * 2)
{
return inputString;
}
ASCIIEncoding ascii = new ASCIIEncoding();
int tempLen = 0;
string tempString = "";
byte[] s = ascii.GetBytes(inputString);
for (int i = 0; i < s.Length; i++)
{
if ((int)s[i] == 63)
{
tempLen += 2;
}
else
{
tempLen += 1;
}
tempString += inputString.Substring(i, 1);
if (tempLen >= length * 2)
break;
}
return tempString;
}
public static string GetSub(string sub, int length) { if (sub == null) return string.Empty; int len = length * 2; //aequilateLength为中英文等宽长度,cutLength为要截取的字符串长度 int aequilateLength = 0, cutLength = 0; Encoding encoding = Encoding.GetEncoding("gb2312");
string cutStr = sub.ToString(); int strLength = cutStr.Length; byte[] bytes; for (int i = 0; i < strLength; i++) { bytes = encoding.GetBytes(cutStr.Substring(i, 1)); if (bytes.Length == 2)//不是英文 aequilateLength += 2; else aequilateLength++;
if (aequilateLength <= len) cutLength += 1;
if (aequilateLength > len) return cutStr.Substring(0, cutLength);//+ "..." } return cutStr; }
原文：http://www.cnblogs.com/DTWolf/p/4670697.html