Question

I am using following code to read text from a .txt file. But I don’t know how to
perform search within file and how to read a specific line in the text file, based on search.

Dim vrDisplay = My.Computer.FileSystem.ReadAllText(CurDir() & "\keys.txt")
    MsgBox(vrDisplay)

For an example,

if I want to read the line that contains the word “Start”, how to do that

Thanks.

Answer 1

Instead of reading all text, for efficiency’s sake,

• Open a FileStream for the file in question.
• Create a StreamReader.
• Loop through, calling ReadLine until either you find the end of the file, or the string contains “Start”.

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Edit: even if it’s required that you keep the entire file in memory, you can still do the above by using a MemoryStream().