如何从线程更新对话框和/或CEdit框? [英] how to update a dialog and/or CEdit box from a thread?

问题描述

您好，我创建了一个MFC对话框应用程序.我创建了一个始终运行的线程，并且希望它更新CEdit框.我传递了一个指向对话框类线程的指针:

thread_handle = CreateThread(NULL,1024,MainThread,this,0,&threadID);

这是线程代码:

Hi, I created a MFC dialog application. I made a thread that is always running and I want it to update a CEdit box. I passed a pointer to the thread that is the dialog class:

thread_handle = CreateThread(NULL,1024,MainThread,this,0,&threadID);

here is the thread code:

DWORD WINAPI MainThread(PVOID arg)
{
	CMPIO_A2D_Carrier_UtilityDlg *obj = (CMPIO_A2D_Carrier_UtilityDlg *)arg;
	
	while(1)
	{
		obj->m_Messages.SetWindowText(_T("Hello...\r\nthis \r\n is a test\r\n"));
obj->UpdateData(FALSE);
		Sleep(1000);
	}

	return(0);
}

当我这样做时，我得到一个断言.那么，从线程更新对话框的正确方法是什么?

When I do this, I get an assertion. So, what is the proper way to update dialogs from a thread?

推荐答案

使用PostMessage 将用户定义的消息发送到主线程/对话框，然后在处理程序，请更新用户界面.

Use PostMessage to send a user defined message to the main thread/dialog, and in the handler for that, update the UI.

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