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

问题描述

嘿，我这里有这个代码:

Hey all i have this code here:

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

这在组合框上工作正常，但在 DateTimePicker 框上似乎不起作用.

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

可能是什么问题?

谢谢！

大卫

推荐答案

不，那是针对 ComboBox 的.原生 DTP 控制非常好.它支持 DTM_CLOSEMONTHCAL 消息来关闭日历，但没有相应的消息来打开它.你将不得不做一些丑陋的事情，比如伪造鼠标或键盘输入.后者可能是最好的:

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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