如何使用VB.net逐行读取文本文件并在DataGrid视图中显示 [英] How do I read a text file line by line using VB.net and displaying in a DataGrid View

问题描述

我是VB.net的新手，已经完成了家庭作业。我需要能够读取某些行并在DateGridView中显示它们。我已经能够将我的记事本.txt文件链接到DGV但是它读取整个文件而不是特定的行。我有4个按钮：btn1，btn2，btn3，btn4。我希望每个按钮显示文本文件中的相应行。经过过去一周的在线研究后，我仍然陷入困境。如果有人可以帮助我，我会非常感激。



文本文件（database.txt）

c1 c2 c3
一个1-1 1-2

两个2-2 2-3

三个3-2 3-3

四个4-2 4-3

Hi, I'm completely new to VB.net and have been given a homework assignment. I need to be able to read certain lines and display them in a DateGridView. I have been able to link my notepad .txt file to the DGV however it reads the whole file as opposed to the specific line. I have 4 buttons: btn1, btn2, btn3, btn4. I want each button to show the respective lines in the text file. After researching on-line for the past week I'm still stuck. If anyone could help me I would really appreciate it.

Text File ("database.txt")
c1 c2 c3
one 1-1 1-2
two 2-2 2-3
three 3-2 3-3
four 4-2 4-3

Public Class Form1

    Private Sub btn1_Click(sender As Object, e As EventArgs) Handles btn1.Click

        Dim lines = (From line In IO.File.ReadAllLines("database.txt") _
                    Select line.Split(CChar(vbTab))).ToArray
        For x As Integer = 0 To lines(0).GetUpperBound(0)
            DataGridView1.Columns.Add(lines(0)(x), lines(0)(x))
        Next
        For x As Integer = 1 To lines.GetUpperBound(0)
            DataGridView1.Rows.Add(lines(x))
        Next
    End Sub


End Class

推荐答案

使用 StreamReader.ReadLine方法 [ ^ ]逐行阅读。

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