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vb.net - 最近几点了？

问题描述

好吧，伙计们，我有（美食时代）的项目好吗？我有 5 次吃饭

（早上，中午，日落，晚上，午夜）

现在我需要放置计时器来检查它是否将当前时间与数组时间匹配如果他发现数组的任何时间与 PC 的当前时间相匹配，他会显示一条消息

我其实很努力，写了代码

    Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
    Dim TimesArray() As String = {"03:20 AM", "12:05 PM", "03:46 PM", "07:33 PM", "08:28 PM"}
    Dim NamesArray() As String = {"Morning", "Midday", "Sunset", "Night", "Midnight"}
    Dim time = DateTime.Now.TimeOfDay
    Dim q = TimesArray.Select(Function(t, i) New With {.Time = DateTime.Parse(t).TimeOfDay, .I = i}).Select(Function(d) New With {d.Time, .Diff = If(d.Time >= time, d.Time - time, New TimeSpan(24, 0, 0) + d.Time - time), d.I})
    Dim m = q.Min(Function(d) d.Diff)
    Dim r = q.First(Function(d) d.Diff = m)
    MsgBox("Food" & " " & NamesArray(r.I) & " " & "After" & " " & r.Diff.Hours & " " & "Hour" & " " & "and" & " " & r.Diff.Minutes & " " & "Minutes.")
End Sub

它可以 100% 工作，但由于Select 功能需要System.Linq.dll在.Net Fremwork 3.5 这就是为什么我想要一些不需要这个功能（Select）并且不需要System.Linq.dll在.Net fremwork 3.5

标签： vb.nettimecompare

解决方案

这应该是你想要的。在每个计时器滴答声中，子遍历您的数组并根据数组检查当前时间，并且时差小于 0 小时和 0 分钟，显示消息框。

Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick
    Dim TimesArray() As String = {"03:20 AM", "12:05 PM", "03:46 PM", "07:33 PM", "08:28 PM"}
    Dim NamesArray() As String = {"Morning", "Midday", "Sunset", "Night", "Midnight"}

    For i As Integer = 0 To TimesArray.Count - 1
        Dim tempDateTime As Date = Date.Parse(TimesArray(i))
        Dim tempTimeDiff As TimeSpan = tempDateTime.Subtract(DateTime.Now)
        If tempTimeDiff.Hours = 0 And tempTimeDiff.Minutes = 0 Then
            MessageBox.Show("Food " & NamesArray(i) & " After " & tempDateTime.Hour & " and " & tempDateTime.Minute & " Minutes.")
        End If
    Next
End Sub

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