查找Excel的Sheetname的方法

#region 查找Sheetname
        ///// <summary>
        ///// 找到sheetname
        ///// </summary>
        ///// <param name="filePath"></param>
        ///// <returns></returns>
        //private static string GetSheetName(string filePath)
        //{
        //    string sheetName = "";

        //    System.IO.FileStream tmpStream = File.OpenRead(filePath);
        //    byte[] fileByte = new byte[tmpStream.Length];
        //    tmpStream.Read(fileByte, 0, fileByte.Length);
        //    tmpStream.Close();

        //    byte[] tmpByte = new byte[]{Convert.ToByte(11),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),
        //   Convert.ToByte(11),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),Convert.ToByte(0),
        //   Convert.ToByte(30),Convert.ToByte(16),Convert.ToByte(0),Convert.ToByte(0)};

        //    int index = GetSheetIndex(fileByte, tmpByte);
        //    if (index > -1)
        //    {

        //        index += 16 + 12;
        //        System.Collections.ArrayList sheetNameList = new System.Collections.ArrayList();

        //        for (int i = index; i < fileByte.Length - 1; i++)
        //        {
        //            byte temp = fileByte[i];
        //            if (temp != Convert.ToByte(0))
        //                sheetNameList.Add(temp);
        //            else
        //                break;
        //        }
        //        byte[] sheetNameByte = new byte[sheetNameList.Count];
        //        for (int i = 0; i < sheetNameList.Count; i++)
        //            sheetNameByte[i] = Convert.ToByte(sheetNameList[i]);

        //        sheetName = System.Text.Encoding.Default.GetString(sheetNameByte);
        //    }
        //    return sheetName;
        //}
        ///// <summary>
        ///// 只供方法GetSheetName()使用
        ///// </summary>
        ///// <returns></returns>
        //private static int GetSheetIndex(byte[] FindTarget, byte[] FindItem)
        //{
        //    int index = -1;

        //    int FindItemLength = FindItem.Length;
        //    if (FindItemLength < 1) return -1;
        //    int FindTargetLength = FindTarget.Length;
        //    if ((FindTargetLength - 1) < FindItemLength) return -1;

        //    for (int i = FindTargetLength - FindItemLength - 1; i > -1; i--)
        //    {
        //        System.Collections.ArrayList tmpList = new System.Collections.ArrayList();
        //        int find = 0;
        //        for (int j = 0; j < FindItemLength; j++)
        //        {
        //            if (FindTarget[i + j] == FindItem[j]) find += 1;
        //        }
        //        if (find == FindItemLength)
        //        {
        //            index = i;
        //            break;
        //        }
        //    }
        //    return index;
        //}