TextReader/StreamReader中是否有"go to line"选项？

Question

我有一个25k行的巨大文本文件.在文本文件中,每行以"1\t(linenumber)"开头

例:

1   1   ITEM_ETC_GOLD_01    ??(?)   xxx xxx xxx_TT_DESC 0   0   3   3   5   0   180000  3   0   1   0   0   255 1   1   0   0   0   0   0   0   0   0   0   0   -1  0   -1  0   -1  0   -1  0   -1  0   0   0   0   0   0   0   100 0   0   0   xxx item\etc\drop_ch_money_small.bsr    xxx xxx xxx 0   2   0   0   1   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0   0   0   0   0   0   0   0   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1   ??? ??? ?(param1??) -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx 0   0
1   2   ITEM_ETC_GOLD_02    ??(?)   xxx xxx xxx_TT_DESC 0   0   3   3   5   0   180000  3   0   1   0   0   255 1   1   0   0   0   0   0   0   0   0   0   0   -1  0   -1  0   -1  0   -1  0   -1  0   0   0   0   0   0   0   100 0   0   0   xxx item\etc\drop_ch_money_normal.bsr   xxx xxx xxx 0   2   0   0   1   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0   0   0   0   0   0   0   0   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1000    ??? ??? ?(param1??) -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx 0   0
1   3   ITEM_ETC_GOLD_03    ??(?)   xxx xxx xxx_TT_DESC 0   0   3   3   5   0   180000  3   0   1   0   0   255 1   1   0   0   0   0   0   0   0   0   0   0   -1  0   -1  0   -1  0   -1  0   -1  0   0   0   0   0   0   0   100 0   0   0   xxx item\etc\drop_ch_money_large.bsr    xxx xxx xxx 0   2   0   0   1   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0   0   0   0   0   0   0   0   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10000   ??? ??? ?(param1??) -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx 0   0
1   4   ITEM_ETC_HP_POTION_01   HP ?? ??    xxx SN_ITEM_ETC_HP_POTION_01    SN_ITEM_ETC_HP_POTION_01_TT_DESC    0   0   3   3   1   1   180000  3   0   1   1   1   255 3   1   0   0   1   0   60  0   0   0   1   21  -1  0   -1  0   -1  0   -1  0   -1  0   0   0   0   0   0   0   100 0   0   0   xxx item\etc\drop_ch_bag.bsr    item\etc\hp_potion_01.ddj   xxx xxx 50  2   0   0   1   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0   0   0   0   0   0   0   0   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 120 HP???   0   HP???(%)    0   MP???   0   MP???(%)    -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx 0   0
1   5   ITEM_ETC_HP_POTION_02   HP ??? (?)  xxx SN_ITEM_ETC_HP_POTION_02    SN_ITEM_ETC_HP_POTION_02_TT_DESC    0   0   3   3   1   1   180000  3   0   1   1   1   255 3   1   0   0   1   0   110 0   0   0   2   39  -1  0   -1  0   -1  0   -1  0   -1  0   0   0   0   0   0   0   100 0   0   0   xxx item\etc\drop_ch_bag.bsr    item\etc\hp_potion_02.ddj   xxx xxx 50  2   0   0   2   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0   0   0   0   0   0   0   0   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 220 HP???   0   HP???(%)    0   MP???   0   MP???(%)    -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx 0   0
1   6   ITEM_ETC_HP_POTION_03   HP ??? (?)  xxx SN_ITEM_ETC_HP_POTION_03    SN_ITEM_ETC_HP_POTION_03_TT_DESC    0   0   3   3   1   1   180000  3   0   1   1   1   255 3   1   0   0   1   0   200 0   0   0   4   70  -1  0   -1  0   -1  0   -1  0   -1  0   0   0   0   0   0   0   100 0   0   0   xxx item\etc\drop_ch_bag.bsr    item\etc\hp_potion_03.ddj   xxx xxx 50  2   0   0   3   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0   0   0   0   0   0   0   0   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 370 HP???   0   HP???(%)    0   MP???   0   MP???(%)    -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx 0   0
1   7   ITEM_ETC_HP_POTION_04   HP ??? (?)  xxx SN_ITEM_ETC_HP_POTION_04    SN_ITEM_ETC_HP_POTION_04_TT_DESC    0   0   3   3   1   1   180000  3   0   1   1   1   255 3   1   0   0   1   0   400 0   0   0   7   140 -1  0   -1  0   -1  0   -1  0   -1  0   0   0   0   0   0   0   100 0   0   0   xxx item\etc\drop_ch_bag.bsr    item\etc\hp_potion_04.ddj   xxx xxx 50  2   0   0   4   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0   0   0   0   0   0   0   0   0   0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 570 HP???   0   HP???(%)    0   MP???   0   MP???(%)    -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx -1  xxx 0   0

问题:如何直接阅读,例如第5行？

Answer 1

您可以使用我的LineReader类(MiscUtil中的一个或这里的简单版本)来实现IEnumerable<string>然后使用LINQ:

string line5 = new LineReader(file).Skip(4).First();

无可否认,这假定为.NET 3.5.否则,打开一个TextReader(例如with File.OpenText)并只调用ReadLine()四次跳过你不想要的行,然后再读一次第五行.

除非你确切地知道每行中有多少字节,否则无法"快捷".