Form 界面假死

Question

程序点击按钮执行循环的时候界面是假死状态,
循环方法:private void sour()
        {
            HtmlElementCollection collectionoo = extendWebBrowser1.Document.GetElementsByTagName("A");            foreach (HtmlElement elem in collectionoo)
            {
                if (elem.OuterHtml.Contains("title"))
                {
                    if (!elem.OuterHtml.Contains("d_link d_a"))
                    {
                        listBox1.Items.Add(elem.InnerText);
                        string ostr = elem.OuterHtml;
                        string ostr1 = ostr.Substring(ostr.LastIndexOf("http"));
                        string ostr2 = ostr1.Substring(0, ostr1.LastIndexOf("\" target"));
                        HttpWebRequest myWebRequest = (HttpWebRequest)WebRequest.Create(ostr2);
                        WebResponse resp = myWebRequest.GetResponse();
                        StreamReader oStreamRd = new StreamReader(resp.GetResponseStream(), Encoding.GetEncoding("GB2312"));
                        string oStr3 = oStreamRd.ReadToEnd();
                        string oStr4 = oStr3.Substring(oStr3.LastIndexOf("surl+\"") + 6);
                        string oStr5 = oStr4.Substring(0, oStr4.LastIndexOf("?\" + Au"));
                        listBox1.Items.Add(oStr5 );
                    }
                }
            }
            linkLabel3_LinkClicked(null, null); //下一页
        }
调用方法://这样调用,只有循环结束界面才显示数据.
private void button4_Click(object sender, EventArgs e)
        {
            sour();
        }
//用线程调用,异常: 指定的转换无效。在[HtmlElementCollection collectionoo = extendWebBrowser1.Document.GetElementsByTagName("A");]
private void button3_Click(object sender, EventArgs e)
        {
            th = new Thread(new ThreadStart(this.sour));
            th.Start();
        }

Answer 1

这样调用异常:指定的转换无效。 在[HtmlElementCollection collectionoo = extendWebBrowser1.Document.GetElementsByTagName("A");] private void button4_Click(object sender, EventArgs e)
        {
            AsyncEventHandler asy = new AsyncEventHandler(this.sour);
            IAsyncResult ia = asy.BeginInvoke(null, null); 
            //sour();
        }

Answer 2

private void sour()
        {
            HtmlElementCollection collectionoo = extendWebBrowser1.Document.GetElementsByTagName("A");            foreach (HtmlElement elem in collectionoo)
            {
                if (elem.OuterHtml.Contains("title"))
                {
                    if (!elem.OuterHtml.Contains("d_link d_a"))
                    {
                        listBox1.Items.Add(elem.InnerText);
                        string ostr = elem.OuterHtml;
                        string ostr1 = ostr.Substring(ostr.LastIndexOf("http"));
                        string ostr2 = ostr1.Substring(0, ostr1.LastIndexOf("\" target"));
                        HttpWebRequest myWebRequest = (HttpWebRequest)WebRequest.Create(ostr2);
                        WebResponse resp = myWebRequest.GetResponse();
                        StreamReader oStreamRd = new StreamReader(resp.GetResponseStream(), Encoding.GetEncoding("GB2312"));
                        string oStr3 = oStreamRd.ReadToEnd();
                        string oStr4 = oStr3.Substring(oStr3.LastIndexOf("surl+\"") + 6);
                        string oStr5 = oStr4.Substring(0, oStr4.LastIndexOf("?\" + Au"));
                        listBox1.Items.Add(oStr5 );
                    }
                }
            }
            [color=#800000]linkLabel3_LinkClicked(null, null); //下一页[/color]
        }
private void button3_Click(object sender, EventArgs e)
        {
            th = new Thread(new ThreadStart(this.sour));
            th.Start();
        }
红色字体的改成listBox1.BeginInvoke.....................

Answer 3

trylinkLabel3_LinkClicked(null, null); //下一页改为Application.DoEvents();
linkLabel3_LinkClicked(null, null); //下一页

Answer 4

看下 backgroundworker 控件
 此消息通过 【CSDN论坛 Winform测试版】 回复！
龙月.NET的博客