VB.net可编程地下拉DateTimePicker [英] VB.net Programmably drop down the DateTimePicker

问题描述

我所有的代码在这里：

 调用SendMessage（dtPicker.Handle，CB_SHOWDROPDOWN，True，0&）
  

在组合框中工作正常，但在DateTimePicker框中似乎不起作用。 p>

可能是什么问题？

谢谢！

David

解决方案

不，这是一个ComboBox。本机DTP控件是非常肮脏的。它支持DTM_CLOSEMONTHCAL消息关闭日历，但没有相应的消息来打开它。你必须做一些像假鼠标或键盘输入一样丑陋的东西。后者可能是最好的：

  Private Sub ShowMonthCalendar_Click（ByVal sender As System.Object，ByVal e As System.EventArgs）Handles ShowMonthCalendar 。
 DateTimePicker1.Focus（）
 SendKeys.Send（{F4}）
 End Sub 
  

Hey all i have this code here:

Call SendMessage(dtPicker.Handle, CB_SHOWDROPDOWN, True, 0&)

That works fine on comboboxes but doesn't seem to work when it comes to the DateTimePicker box.

What could be the problem?

Thanks!

David

解决方案

No, that's for a ComboBox. The native DTP control is quite noddy. It supports the DTM_CLOSEMONTHCAL message to close the calendar but doesn't have a corresponding message to open it. You'll have to do something ugly like faking mouse or keyboard input. The latter is probably best:

Private Sub ShowMonthCalendar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ShowMonthCalendar.Click
    DateTimePicker1.Focus()
    SendKeys.Send("{F4}")
End Sub

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