我有一个文本文件,用于多选问题和答案表单。我想一次调用4行,并在标签中输出这4个值。出于演示目的,每行将有一个单词,因此用户必须在选项1 - 4之间进行选择,例如
但是我想为3个标签随机选择4个值,但我的文件将有6个标签的足够值,这样每次用户加载程序时它都不会重复这些问题。
Here是我的文本文件
Public Class Form1
Dim rand As New Random
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Dim QuestionFile As New IO.StreamReader(CurDir() & "\" & "Questions.txt")
Dim fileContentsQ As String = QuestionFile.ReadToEnd
Dim fileListQ As New List(Of String)
For Each Str As String In fileContentsQ.Split(CChar(vbCrLf))
fileListQ.Add(Str)
Next
Dim randItem As Integer = rand.Next(0, fileListQ.Count - 1)
Label1.Text = (fileListQ.Item(randItem))
fileListQ.RemoveAt(randItem)
'removes item from list so that it isn't repeated
Dim randItem2 As Integer = rand.Next(0, fileListQ.Count - 1)
Label2.Text = (fileListQ.Item(randItem))
fileListQ.RemoveAt(randItem)
Dim randItem3 As Integer = rand.Next(0, fileListQ.Count - 1)
Label3.Text = (fileListQ.Item(randItem))
fileListQ.RemoveAt(randItem)
End Sub
结束班
问题是,当我希望每个标签一次显示4个单词时,每个标签只显示一个单词/行,例如Label1
可能(全部在彼此之下):
红
蓝
绿色
黄
答案 0 :(得分:0)
尝试一下:
Dim lst As New List(Of String)(IO.File.ReadAllLines("Archivo.txt"))
Dim nst As New List(Of String)
Randomize()
While lst.Count > 0
Dim rdi As Integer = CInt(Math.Floor(Rnd() * lst.Count))
nst.Add(lst(rdi))
lst.RemoveAt(rdi)
End While
IO.File.WriteAllLines("Archivo.txt", nst.ToArray, Encoding.Unicode)
希望有帮助。