在C#中截取指定长度的中文字符串
private static string SubString(string stringToSub, int length)
{
Regex regex = new Regex("[/u4e00-/u9fa5]+", RegexOptions.Compiled);
char[] stringChar = stringToSub.ToCharArray();
StringBuilder sb = new StringBuilder();
int nLength = 0;
for (int i = 0; i < stringChar.Length; i++)
{
if (regex.IsMatch((stringChar[i]).ToString()))
{
sb.Append(stringChar[i]);
nLength += 2;
}
else
{
sb.Append(stringChar[i]);
nLength = nLength + 1;
}
if (nLength > length)
break;
}
return sb.ToString();
}
public static string SubComment(string original, int width)
{
int len = original.Length;
if (len < width)
return original;
int clen = 0;//当前长度
int cwidth = 0;//当前宽度
while (clen < len && cwidth < width)
{
if ((int) original[clen] > 128)
cwidth++;
clen++;
cwidth++;
}
return original.Substring(0, clen);
}
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