如何让循环移动到下一个可用的ID，而不是连续进行? [英] How to have loop move to the next id available rather than doing the same continuously?

问题描述

现在，当我运行此命令时，它会每2秒单击一次相同的按钮.我试图弄清楚如何继续使用下一个ID，而不是继续执行找到的第一个ID，然后破坏它.这是我的代码:

Right now when I run this it keeps clicking on the same button every 2 seconds. I'm trying to figure out how I can go on to the next ID rather than it keep doing the first one it finds then breaking. Here is my code:

private void button2_Click(object sender, EventArgs e)
{
    timer1.Start();
}

private void timer1_Tick(object sender, EventArgs e)
{
    HtmlDocument doc = webBrowser1.Document;
    HtmlElementCollection links = doc.GetElementsByTagName("a");

    foreach (HtmlElement link in links)
    {
        if (link.GetAttribute("id").Contains("user"))
        {
            link.InvokeMember("click");
            break;
        }
    }
}

推荐答案

将代码更改为此...

Change your code to this...

//HtmlElementCollection links = null;
List<HtmlElement> links = null;

private void button2_Click(object sender, EventArgs e)
{
    // This way you only get the links once.
    //links = webBrowser1.Document.GetElementsByTagName("a");
    links = new List<HtmlElement>(
        webBrowser1.Document.GetElementsByTagName("a")
        .OfType<HtmlElement>());

    timer1.Start();
}

private void timer1_Tick(object sender, EventArgs e)
{
    HtmlElement linkToClick = null;

    foreach (HtmlElement link in links)
    {
        if (link.GetAttribute("id").Contains("user"))
        {
            linkToClick = link;
            break;
        }
    }

    // did I find a link?
    if (linkToClick != null)
    {
        // Remove it from the list so you don't click it again.
        links.Remove(linkToClick);

        link.InvokeMember("click");
    }
    else
    {
        // Stop the timer since there are no more items.
        timer1.Stop();
    }
}

顺便说一句，我不知道HtmlElementCollection是否具有删除"方法...如果没有，只需使用通用List<>或ArrayList等.

By the way, I don't know if HtmlElementCollection has a "Remove" method... if it doesn't, simply use a generic List<> or an ArrayList, etc.

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