/// <summary>
/// 剪切指定长度的字符串，并去掉HTML标记
/// </summary>
/// <param name="strr">要剪切字符串的Object形式</param>
/// <param name="len">长度（中文长度为2)</param>
/// <returns></returns>
public static string CutStringX(object strr, int len)
{
string str = strr.ToString();
string strRet = "";
char CH;
int nLen = str.Length;
int nCutLen = 0;
int nPos = 0;
int bLeft = 0;
int nChinese = 0;
while (nPos < nLen && nCutLen < len)
{
CH = str[nPos];
nPos++;
if (CH == '<')
{
bLeft++;
continue;
}
if (CH == '>')
{
bLeft--;
continue;
}
if (nCutLen == 0 && CH.ToString() == " " && CH.ToString() == "\n")
{
continue;
}
if (bLeft == 0)
{
//是否为中文
if (IsChinese(CH))
{
nCutLen += 2;
nChinese++;
}
else
{
nCutLen += 1;
}
strRet += CH;
}
}
strRet = strRet.Replace(" ", " ");
if (nPos < nLen)
{
strRet += "";
// strRet += "...";
}
return(strRet);
}
protected int CalculateEvenPositionDigits(string EighteenDigitNumber)
{
int sum = 0;
string strConat = "";
const int MulBy = 2;
for (int n = 0; n < EighteenDigitNumber.Length; n = n + 2)
{
//multiple even position digits by 2
long result = Convert.ToInt32(EighteenDigitNumber.Substring(n + 1, 1)) * MulBy;
//Concatenate Them
strConat = string.Concat(strConat, result.ToString());
}
foreach (char CH in strConat)
{
//Add all the digits in the string
sum += Convert.ToInt32(CH.ToString());
}
return(sum);
}