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Editorial Team
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Asked: 2026-05-30T15:43:29+00:00

I’m tasked with reading a large text files(not XML’s) may be in GB’s in

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I’m tasked with reading a large text files(not XML’s) may be in GB’s in size. I need to split the file into smaller chunks by checking for the header . Suggest me some method to achieve this. Sample text structure will be

Sample large file
header_start
blaw
blaw
blawasasdasda
header_start
blaw
blawasdasda
blaw

Need to split into

1.txt
header_start
blaw
blaw
blawasasdasda

2.txt
header_start
blaw
blawasdasda
blaw

Please help me to achieve this in .net 4.0 with less time

Thanks
Vivek

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1 Answer

  1. Editorial Team

    Create a StreamReader for the large file and call ReadLine() in a loop.
    Maintain a StreamWriter for the current output file.
    For each line, check whether it’s a header, and, if it is, open a new target file in the StreamWriter. If it isn’t, just write that line to the current StreamWriter.

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