c:\123.txt文件内容如下:
Time          SN            RTN_NDS_STBID_CHIPID      USERCODE                 
2009-11-25 21:17:06 21500000000000000001 4948442689504752 7E7303CB CPE000030HU110900000019
2009-11-25 21:20:03 21500000000000000002 4948442689504752 7E7303CD CPE000030HU110900000020
2009-11-25 21:21:51 21500000000000000003 4948442689504752 7E7303CE CPE000030HU110900000021
我想在Text1中输入21500000000000000001后能将SN列下21500000000000000001对应的4948442689504752 7E7303CB CPE000030HU110900000019取出赋值到Text2,Text3改怎么做?