暂停执行而不会冻结表单吗? [英] Pausing execution without the form freezing?

问题描述

以下是我的一种方法中的一些代码:

webBrowser1.Focus();
System.Windows.Forms.SendKeys.Send("{PGDN}");

我正在使用它来强制Web浏览器向下滚动，以便屏幕上显示我正在使用的网站上的图片.

然后我用:

findClick();

我将其编码为:(image1)在屏幕上查找图像并单击.
效果很好.

我的问题是:
(这是下一行代码):

webBrowser1.Focus();
System.Windows.Forms.SendKeys.Send("{PGDN}");
Point one = this.Location; //at this section my program doesn''t wait for the above two commands to run before starting this line
//it runs the code before the screen has been scrolled so my picture finder never gets found.

如何在执行下一行命令之前等待一定的时间?
休眠不工作!!!!!!!!!!
该命令将冻结表格，并且不会对此问题执行任何操作.我也不能使用计时器，因为我需要代码保留在此方法中(最好是一行，例如thread.Sleep)

我将如何去做呢?

另一个类似的问题:

using:
webBrowser1.Navigate("http://google.com");
second command;
third command;

这不等待第一个命令完成，所以我想放置一个计时器，上面写着wait(5000)然后继续.
我知道有关DOCUMENTCOMPLETED事件的信息，我以它为例！
您需要阅读有关线程的知识.等待是没有意义的.发送密钥是一种严重的滥用行为.你为什么要那样做?您需要说明您的目标以获取建议，但是无论您做什么，发送密钥和等待都不是正确的工具.

基本上，您需要处理事件System.Windows.Forms.WebBrowser.DocumentCompleted，如下所示:

 MyBrowser.DocumentCompleted + =(发送方，eventArgs){
    (((WebBrowser)sender).Print();
    //  ... 
}; 

请参阅 http://msdn.microsoft.com/en-us/library /system.windows.forms.webbrowser.documentcompleted.aspx [ ^ ]， http://msdn.microsoft.com/en-us/library/system.windows.forms.webbrowser.aspx [

I''m using this to force the webbrowser to scroll down so that a picture on the site I''m using is on screen.

Then I use:

findClick();

I have coded this to mean: using(image1) find image on screen and click.
It works fine.

MY PROBLEM IS:
(here is the next line of code):

webBrowser1.Focus();
System.Windows.Forms.SendKeys.Send("{PGDN}");
Point one = this.Location; //at this section my program doesn''t wait for the above two commands to run before starting this line
//it runs the code before the screen has been scrolled so my picture finder never gets found.

How do I wait for a certain amount of time before executing the next line of command?
THREAD.SLEEP DOESN''T WORK!!!!!!!!!!
This command freezes the form and doesn''t do anything for this problem. I also cannot use timers because I need the code to remain in this method (preferably in one line, like thread.Sleep)

How would I go about doing this?

ANOTHER SIMILAR PROBLEM:

using:
webBrowser1.Navigate("http://google.com");
second command;
third command;

This doesn''t wait for the first command to finish so I would like to place a timer that says wait(5000) then continue.
I KNOW ABOUT DOCUMENTCOMPLETED events, I''m using this as an example!

解决方案

Everything is so wrong, so I was puzzled how to answer.

You need to read about threading. Waiting is pointless. Sending keys is a big abuse. Why would you ever do that? You need to explain your goal to get an advice, but whatever you do, sending keys and waiting will never be a right tool.

Basically, you need to handle event System.Windows.Forms.WebBrowser.DocumentCompleted, something like this:

MyBrowser.DocumentCompleted += (sender, eventArgs) {
    ((WebBrowser)sender).Print();
    //...
};

See http://msdn.microsoft.com/en-us/library/system.windows.forms.webbrowser.documentcompleted.aspx[^], http://msdn.microsoft.com/en-us/library/system.windows.forms.webbrowser.aspx[^].

—SA

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