连续引发两个事件 [英] Raising two events consecutively

问题描述

我有一个窗体，其中除其他控件外，还包含一个按钮和一个文本框.当用户在文本框中输入内容时，随着用户离开文本框，我将使用"Leave"方法检查文本框的内容.如果在完成在文本框中的键入后，用户立即单击一个按钮，则将执行"Leave"事件的方法，但不会执行该按钮的Click事件的方法.一个简单的代码如下所示.如果键入textBox1并单击button1，则收到的唯一消息是"Hello from Textbox".

I have a form which among other controls has a button and a textbox. When a user types some stuff into the textbox, I examine the content of the textbox with the "Leave" method as the user moves away from the textbox. If upon finishing typing into the textbox the user clicks a button immediately, the method for the "Leave" event gets executed but the method for the button’s Click event does not. A trivial code is shown below. If you type into textBox1 and click on the button1, the only message you get is "Hello from Textbox".

private void textBox1_Leave(object sender, EventArgs e)
        {
            MessageBox.Show("Hello from Textbox");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("Hello from button");
        }

感谢您对为何单击事件未执行的任何想法.

谢谢.
Gassim

I would appreciate any ideas on why the click event is not executing.

Thanks.
Gassim

推荐答案

在单击按钮之前，将禁用该窗体，以便可以在其上方显示模式MessageBox，并且范围从按钮更改为控件MessageBox.第二个事件永远都没有机会被提出.但是，很有可能连续有两个事件，如本示例所示(在具有两个TextBoxes的窗体上):

Before the button can be clicked, the form is disabled so that the modal MessageBox can be shown above it and the scope changes from the button to a control on the MessageBox. The second event never gets a chance to be raised. However, it is quite possible to have two events in a row, such as demonstrated by this example (on a form with two TextBoxes):

private void textBox1_Leave(object sender, EventArgs e)
{
	MessageBox.Show("Leave1");
}
private void textBox1_Enter(object sender, EventArgs e)
{
	MessageBox.Show("Enter1");
}
private void textBox2_Enter(object sender, EventArgs e)
{
	MessageBox.Show("Enter2");
}
private void textBox2_Leave(object sender, EventArgs e)
{
	MessageBox.Show("Leave2");
}

我怀疑这是Windows问题，按钮单击事件未触发，因为b/c文本框通常失去了对程序的关注，并且按钮不会被点击.

I would suspect that this is a windows issue, the button click event is not fired b/c the textbox is losing focus to the program in general, and the button is not clicked.

感谢您抽出宝贵的时间来回答Christian.看来我将不得不找到解决此问题的方法.

Thanks for taking the time to respond Christian. Looks like I am going to have to find a way around this problem.

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