Question

我正在使用vb.net，这就是我在test.txt文件中的内容：

My name is james

I was born in Melaka

*

I like to eat fish

#

My hobby is riding

我希望我的函数在符号*和＃

之间读取此文件

这是我的功能以及我将如何编辑它以将条件放入？

 Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
   Dim fileReader As String
   fileReader = My.Computer.FileSystem.ReadAllText("C:\Users\user\Documents\text.txt")
   txt2.Text = (fileReader)
End Sub

由于

Answer 1

因为你可以用LINQ做任何事情：

Dim result = From line In File.ReadLines("c:\path\to\your\file.txt")
             Skip While line <> "*"
             Skip 1
             Take While line <> "#"

For Each line In result
    ' Do something '
Next

[*]：不正确

Answer 2

正则表达式是一个快速解决方案，使用(\*)([\s\S]+)(\#)模式，您可以找到*和#之间的任何内容

   Dim fileReader As String
   fileReader = My.Computer.FileSystem.ReadAllText("C:\Users\user\Documents\text.txt")
   txt2.Text = System.Text.RegularExpressions.Regex.Match(fileReader,"(\*)([\s\S]+)(\#)").toString()

如何使用vb.net读取txt文件中的某一行？

2 个答案: