我的Visual Basic项目遇到了一些问题。
如果在美国推出任何新电视剧/可供下载(第二天),我会制作一个节目。
(美国和Torrent是瑞典语的日子)
所以我已经这样做但我想添加一个DateTimePicker,所以我可以选择一天,然后检查什么是可用的。好吧,我注意到DateTimePicker总是从当前日期开始,所以我只是这样添加它:
Dim DateTimePickerDay = Me.DateTimePicker1.Value.DayOfWeek.ToString()
Dim USstatus = "Tomorrow"
Dim DownloadStatus = "Today"
If DateTimePickerDay = "Monday" Then
StatusLabel1.Text = USstatus
StatusLabel1.ForeColor = Color.Blue
StatusLabel5.Text = DownloadStatus
StatusLabel5.ForeColor = Color.Green
StatusLabel6.Text = DownloadStatus
StatusLabel6.ForeColor = Color.Green
End If
但现在我希望能够使用DateTimePicker更改当天,并查看当天可用的内容。所以我试着把Lebel变成这样的一天:
Private Sub Button11_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click
Me.Label4.Text = Me.DateTimePicker1.Value.DayOfWeek.ToString()
End Sub
然后:
If Me.Label4.Text = "Monday" Then
StatusLabel1.Text = USstatus
StatusLabel1.ForeColor = Color.Blue
StatusLabel5.Text = DownloadStatus
StatusLabel5.ForeColor = Color.Green
StatusLabel6.Text = DownloadStatus
StatusLabel6.ForeColor = Color.Green
End If
所以,当标签说"星期一"时,如果我选择星期一,它会这样做。它将显示星期一可用的系列。嗯,这不起作用,我无法弄清楚原因。
任何人都可以向我解释我如何才能使这个工作,我做错了什么?
答案 0 :(得分:1)
您应该将比较基于DayOfWeek
枚举而不是字符串
If Me.DateTimePicker1.Value.DayOfWeek = DayOfWeek.Monday Then
...
End If
并检查用户是否在答案中已经提及的ValueChanged
DateTimePicker
事件中选择了一个日期。
答案 1 :(得分:0)
这是因为您没有告诉任何事情要听取datepicker1
或label4
的更改。我会这样做,以便当datepicker
发生变化(每次)时,内部代码将会触发,从而改变内容。您需要将ContentChanger
子中的一些变量公开或在本地设置它们,否则它们将无法访问。
尝试以下内容:
Private Sub DateTimePicker1_ValueChanged(sender As Object, e As EventArgs) Handles DateTimePicker1.ValueChanged
' When the datepicker1 has changed (date has been chosen).. do something with that date
' Get the datepicker's chosen day name
Dim dayOfWeek As String = DateTimePicker1.Value.DayOfWeek.ToString()
' Update the label to show the user
Label4.Text = dayOfWeek
' Now change the content shown according to the date range
ContentChanger(dayOfWeek)
End Sub
Sub ContentChanger(dayOfWeek As String)
If dayOfWeek = "Monday" Then
StatusLabel1.Text = USstatus
StatusLabel1.ForeColor = Color.Blue
StatusLabel5.Text = DownloadStatus
StatusLabel5.ForeColor = Color.Green
StatusLabel6.Text = DownloadStatus
StatusLabel6.ForeColor = Color.Green
End If
End Sub