C#采集网页，模拟点击后无法加载新页面

Question

采集该网址：
http://www.iwencai.com/stockpick/search?typed=1&preParams=&ts=1&f=3&qs=pc_%7Esoniu%7Estock%7Estock%7Ehistory%7Equery&selfsectsn=&querytype=&searchfilter=&tid=stockpick&w=%E6%A6%82%E5%BF%B5%E6%9D%BF%E5%9D%97%EF%BC%8C%E5%9F%8E%E5%B8%82

要求：模拟点击下一页，选择显示70/条每页，（抓包不知是否可获得下一页的地址），我的代码如下，运行后获得的html代码仍为第一页，没有翻页。
public class gWebByWebBrowser
{
WebBrowser web;

HtmlElement btnAdd = null;
public gWebByWebBrowser(){
web = new WebBrowser();

}

    public string GetHtml(string url,  WBrowserPara wBrowserPara){
        //web.DocumentCompleted += web_DocumentCompleted;
        web.Navigate(url);
        while (web.ReadyState != WebBrowserReadyState.Complete) Application.DoEvents();                     
        eventCounter = 0;           
        operation();
        return web.DocumentText;
    }
    void operation(){ // 模拟操作
        HtmlElementCollection Aresults = web.Document.GetElementsByTagName("a");
        foreach (HtmlElement item in Aresults){
            if (item.InnerHtml == "下页") { btnAdd = item; }                 
        }
        btnAdd.InvokeMember("onclick");
              foreach (HtmlElement f in web.Document.GetElementsByTagName("option"))
    {
        if (f.InnerText == @"显示70条/页")
        {
            f.InvokeMember("Click");
            f.SetAttribute("selected", "selected");
        }
    }
        web.Refresh();
        while (web.ReadyState != WebBrowserReadyState.Complete) Application.DoEvents();           
    }
}

Answer 1

直接采集接口数据就行了。。

接口在这里。。perpage是每页显示多少条记录的，p是第几页的，直接更换这2个参数就行了

http://www.iwencai.com/stockpick/cache?token=fd623f0f4f14b6da323ec7e51206c44b&p=1&perpage=50&changeperpage=1&showType=[%22%22,%22%22,%22onTable%22,%22onTable%22,%22onTable%22,%22onTable%22,%22onTable%22,%22onTable%22,%22onTable%22,%22onTable%22]