1 private string GetByteString(string center, int maxlen, string endStr)
2 {
3 string temp = center.Substring(0, (center.Length < maxlen + 1) ? center.Length : maxlen + 1);
4 byte[] encodedBytes = System.Text.ASCIIEncoding.ASCII.GetBytes(temp);
5 string outputStr = "";
6 int count = 0;
7 for (int i = 0; i < temp.Length; i++)
8 {
9 if ((int)encodedBytes[i] == 63)
10 count += 2;
11 else
12 count += 1;
13
14 if (count <= maxlen - endStr.Length)
15 outputStr += temp.Substring(i, 1);
16 else if (count > maxlen)
17 break;
18 }
19 if (count <= maxlen)
20 {
21 outputStr = temp;
22 endStr = "";
23 }
24 outputStr += endStr;
25 return outputStr;
26 }
