vb net如何从txt文件中读取每一行

问题描述：

我想阅读一个只有2行的文本文件，并在文本框中显示它们是我的代码（来自MSDN），但无法弄清楚如何继续：

I want to read a text file with only 2 Lines and show them in text boxes here is my code (from MSDN) but cannot figure out how to continue:

Dim fileReader As System.IO.StreamReader
fileReader = My.Computer.FileSystem.OpenTextFileReader("C:\Program Files\login.conf")
        Dim str1, str2 As String

并且在变量str1中使用txt文件的第一行，在str2中使用第二行，如下所示：

and have the first Line of the txt file in variable str1 and second in str2 like this :

textbox1.text = str1
textbox2.text = str2

答

您可以使用File.ReadAllLines方法，非常容易使用。 https://msdn.microsoft.com/en -us / library / system.io.file.readalllines（v = vs.110）.aspx [ ^ ]

https://msdn.microsoft.com/en-us/library/s2tte0y1（ⅴ = vs.110）.aspx [ ^ ]

You could just use the File.ReadAllLines method, very easy to use. https://msdn.microsoft.com/en-us/library/system.io.file.readalllines(v=vs.110).aspx[^]

https://msdn.microsoft.com/en-us/library/s2tte0y1(v=vs.110).aspx[^]

使用File.ReadAllLines方法

Use File.ReadAllLines Method

Public Shared Function ReadAllLines (
    path As String
) As String()

示例：

Example:

Imports System
Imports System.IO

Public Class Test
    Public Shared Sub Main()
        Dim path As String = "c:\temp\MyTest.txt"
        Dim sw As StreamWriter

        ' This text is added only once to the file.
        If File.Exists(path) = False Then

            ' Create a file to write to.
            Dim createText() As String = {"Hello", "And", "Welcome"}
            File.WriteAllLines(path, createText)
        End If

        ' This text is always added, making the file longer over time
        ' if it is not deleted.
        Dim appendText As String = "This is extra text" + Environment.NewLine
        File.AppendAllText(path, appendText)

        ' Open the file to read from.
        Dim readText() As String = File.ReadAllLines(path)
        Dim s As String
        For Each s In readText
            Console.WriteLine(s)
        Next
    End Sub
End Class

希望它能解决您的问题

hope it would resolve your issue

vb net如何从txt文件中读取每一行

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