[转]asp.net区分中英文字符串截取

/// <summary>
/// 字符串切割
/// </summary>
/// <param name="p_SrcString"></param>
/// <param name="p_Length"></param>
/// <returns></returns>
public static string GetSubString(string p_SrcString, int p_Length)
{
string myResult = p_SrcString;
if (p_Length >= 0)
{
byte[] bsSrcString = System.Text.Encoding.GetEncoding("GB2312").GetBytes(p_SrcString);
if (bsSrcString.Length >= p_Length)
{
int nRealLength = p_Length;
int[] anResultFlag = new int[p_Length];
byte[] bsResult = null;
int nFlag = 0;
for (int i = 0; i < p_Length; i++)
{
if (bsSrcString[i] > 127)
{
nFlag++;
if (nFlag == 3)
nFlag = 1;
}
else
nFlag = 0;
anResultFlag[i] = nFlag;
}
if ((bsSrcString[p_Length - 1] > 127) && (anResultFlag[p_Length - 1] == 1))
nRealLength = p_Length + 1;
bsResult = new byte[nRealLength];
Array.Copy(bsSrcString, bsResult, nRealLength);
myResult = System.Text.Encoding.GetEncoding("GB2312").GetString(bsResult) + "...";
}
}
return myResult;
}