HTML解析组件HtmlAgilityPack使用方法介绍

protected void btnHtml_Click(object sender, EventArgs e)
 { if (tbUrl.Text.Length > 0)
 {
 HtmlWeb htmlWeb = new HtmlWeb();
 HtmlDocument htmlDoc = htmlWeb.Load(this.tbUrl.Text);
 HtmlNode htmlNode = htmlDoc.DocumentNode.SelectSingleNode("//input[@id='VIEWSTATE']");
 string viewStateValue = htmlNode.Attributes["value"].Value;
 htmlNode = htmlDoc.DocumentNode.SelectSingleNode("//input[@id='EVENTVALIDATION']"); 
 string eventValidation = htmlNode.Attributes["value"].Value;
 htmlNode = htmlDoc.DocumentNode.SelectSingleNode("//input[@type='submit']"); 
 string submitName = htmlNode.Attributes["name"].Value;

 tbViewState.Text = viewStateValue;
 tbEventValidation.Text = eventValidation;
 tbSubmitName.Text = submitName;
 }
 }