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如果有以下代码：

Public Shared Function GetNextWeekDay() As Date
    Dim value As Date = Date.Now
    Do
        value = value.AddDays(1)
    Loop While (value.DayOfWeek = DayOfWeek.Saturday) Or (value.DayOfWeek = DayOfWeek.Sunday)
    Return value
End Function


Public Shared Function DPLoadData() As String
    Dim s As StringBuilder = New StringBuilder("<head><meta http-equiv=""content-type"" content=""text/html;charset=utf-8"" /><META HTTP-EQUIV=""REFRESH"" CONTENT=""900"">")
    s.Append("<style type=""text/css"" media=""all""> body{font-family: Arial;}h4{font-size: 10pt;font-weight: bold;white-space: nowrap;margin-top: 0; margin-bottom: 10px;}")
    s.Append("th{font-size: 9pt;font-weight: normal;text-align: center;white-space: nowrap;}td{font-size: 9pt;}.content td{border: solid 1px #dadada;}")
    s.Append(".content th {border: solid 1px #dadada;background-image: url(""tbl_header_row_bg.gif""); background-repeat: repeat-x; white-space: nowrap;}</style></head>")


  s.Append("<h3>" & "Daily Plan" & "</h3>")
        Dim strCurrDay As String = ""
        s.Append("<h5>" & strCurrDay & "</h5>")



    Dim CurrDateFirstDay As Date = GetNextWeekDay()
    strCurrDay = FormatDateTime(CurrDateFirstDay, DateFormat.LongDate)
    s.Append("<h5>" & strCurrDay & "</h5>")
    s.Append(LoadDataGroupByDate(CurrDateFirstDay))

    Return s.ToString()

End Function

函数 DPLoadData 生成一个带有表格的 HTML 文件，并用预订填充它。目前，HTML 文件显示明天的预订（例如，如果今天是星期一，则显示星期二的预订，如果今天是星期五，则显示星期一的预订）。

我需要的是 HMTL 文件在下午 5 点生成例如：如果今天是星期一，那么 HTML 文件应该在星期一下午 5 点生成，并且应该显示星期二到星期二下午 5 点和星期二下午 5 点的预订文件应该在星期三生成，并且应该显示星期三的预订直到星期三下午 5 点，依此类推。

我怎样才能做到这一点？请帮忙。

我的解决方案：

 Public Shared Function GetNextWeekDay() As Date
    Dim value As Date = Date.Now
    Dim intHour As Integer
    Dim intMinute As Integer
    Dim intSecond As Integer


    intHour = 17
    intMinute = 0
    intSecond = 0

    Dim newdatetime As DateTime = New Date(value.Year, value.Month, value.Day, intHour, intMinute, intSecond)

    If DateTime.Now < newdatetime Then

        If value.DayOfWeek = DayOfWeek.Saturday Then
            value = value.AddDays(2)
            Return value
        End If

        If value.DayOfWeek = DayOfWeek.Sunday Then
            value = value.AddDays(1)
            Return value
        End If

        Return value

    ElseIf DateTime.Now > newdatetime Then
        Do
            value = value.AddDays(1)
        Loop While (value.DayOfWeek = DayOfWeek.Saturday) Or (value.DayOfWeek = DayOfWeek.Sunday)
        Return value
    End If
End Function
4

1 回答 1

1

据我了解您的问题，您基本上是在寻找一种在给定时间执行程序的方法？如果是这样，请查看cron或Windows 调度程序，具体取决于您运行它的操作系统。

更新：所以基本上你只需要比较当前时间并检查它是否在下午 5 点之前。然后你应该有一个函数返回从当天下午 5 点到明天下午 5 点的数据。

您可能想看看这个 DateTime 的 VB 教程。基本上，您需要将当前时间与由下午 5 点的当前日期组成的日期时间进行比较。

更新：只需扩展您的 if 条件以检查今天不是周六或周日。这是我刚刚整理的一个小代码片段。我对 VB 不是很熟悉，所以这可能不是 100% 正确，但我想你明白了。

Public Function GetNextWeekDay() As Date
    Dim value As Date = Date.Now
    Dim intHour As Integer
    Dim intMinute As Integer
    Dim intSecond As Integer

    intHour = 17
    intMinute = 0
    intSecond = 0

    Dim newdatetime As DateTime = New Date(value.Year, value.Month, value.Day, intHour, intMinute, intSecond)

    If value.DayOfWeek <> DayOfWeek.Saturday And value.DayOfWeek <> DayOfWeek.Sunday And DateTime.Now < newdatetime Then
        Return value.Date
    Else
        Do
            value = value.AddDays(1)
        Loop While (value.DayOfWeek = DayOfWeek.Saturday) Or (value.DayOfWeek = DayOfWeek.Sunday)
        Return value.Date
    End If
End Function
于 2012-12-04T10:32:18.370 回答