以编程方式更改组合框 [英] Programmatically change combobox

问题描述

我需要使用新值更新组合框，以便更改其中的反射文本。最简单的方法是在组合框初始化并显示一条消息之后。

I need to update a combobox with a new value so it changes the reflected text in it. The cleanest way to do this is after the comboboxhas been initialised and with a message.

对包含组合框的hwnd创建 postmessage 。

So I am trying to craft a postmessage to the hwnd that contains the combobox.

因此，如果我想向其发送消息，将当前选择的项目更改为第n个项目， postmessage 会是什么样子？

So if I want to send a message to it, changing the currently selected item to the nth item, what would the postmessage look like?

我猜这将涉及 ON_CBN_SELCHANGE ，但我不能让它正常工作。

I am guessing that it would involve ON_CBN_SELCHANGE, but I can't get it to work right.

推荐答案

您要 ComboBox_SetCurSel ：

ComboBox_SetCurSel(hWndCombo, n);

或者如果它是一个MFC CComboBox控件，你可以做：

or if it's an MFC CComboBox control you can probably do:

m_combo.SetCurSel(2);

我想象，如果你手动做，你也会想要SendMessage，而不是PostMessage。 CBN_SELCHANGE是控件在更改选择时向您发送的通知。

I would imagine if you're doing it manually you would also want SendMessage rather than PostMessage. CBN_SELCHANGE is the notification that the control sends back to you when the selection is changed.

最后，您可能希望将c ++标记添加到这个问题。

Finally, you might want to add the c++ tag to this question.

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