//截取字符串函数
public static string CutString(string inputString, int len)
{
System.Text.ASCIIEncoding ascii = new System.Text.ASCIIEncoding();
int tempLen = 0;
string tempString = "";
byte[] s = ascii.GetBytes(inputString);
for (int i = 0; i < s.Length; i++)
{
int n = int.Parse((s[i]).ToString());
if (n == 63)
{
tempLen += 2;
}
else
{
tempLen += 1;
}
try
{
tempString += inputString.Substring(i, 1);
}
catch
{
break;
}
if (tempLen > len)
break;
}
// 如果截过则加上半个省略号
//byte[] mybyte = System.Text.Encoding.Default.GetBytes(inputString);
//if (mybyte.Length > len)
// tempString += " …";
return tempString;
}