How to get href attributes of a tags in this string?

Question

In this string exist number li tag .I want get href attribute of a tags such as this:

http://bipardeh94.blogfa.com" target="_blank

http://avaejam.blogfa.com" target="_blank

and ... I want that do this with C# .How to done this? I use this code but this is not complete .

int indexStartUl = _codeHtml.IndexOf("<ul");
            int indexEndUl = _codeHtml.IndexOf("</ul>");
            _codeHtml = _codeHtml.Substring(indexStartUl, indexEndUl);

Please help.

 <ul class="ull">
        <li><a href="http://bipardeh94.blogfa.com" target="_blank">باغ بلور</a><span class="ur">bipardeh94.blogfa.com</span><span class="ds">فرهنگی-خبری-علمی</span></li>
        <li><a href="http://avaejam.blogfa.com" target="_blank">هزار نکته </a><span class="ur">avaejam.blogfa.com</span><span class="ds"> يك نكته از هزار نكته  باشد تا بعد </span></li>
        <li><a href="http://prkangavar.blogfa.com" target="_blank">روابط عمومی دانشگاه آزاداسلامی کنگاور</a><span class="ur">prkangavar.blogfa.com</span><span class="ds">اخبار دانشگاه</span></li>
        <li><a href="http://bordekhoun.blogfa.com" target="_blank">وبلاگ اطلاع رسانی بردخون</a><span class="ur">bordekhoun.blogfa.com</span><span class="ds">اخباروگزارشات وتحلیل ها درباره بردخون</span></li>
        <li><a href="http://mahinvare.blogfa.com" target="_blank">تدوری های نوین</a><span class="ur">mahinvare.blogfa.com</span><span class="ds">نظریه های علوم انسانی باید متحول شود</span></li>
        <li><a href="http://zanjanuniversity.blogfa.com" target="_blank">دانشگاه زنجان</a><span class="ur">zanjanuniversity.blogfa.com</span><span class="ds">اخبار دانشگاهیان زنجان و دانشگاه آزاد زنجان و سیستم ثبت نام شهردای زنجان </span>
        </li>
    </ul>

Answer 1

You can use Selenium WebDriver functionality:

IList<IWebElement> lis = driver.FindElements(By.CssSelector(".ull > li"));
foreach (IWebElement li in lis) {
    string href = li.GetAttribute("href");
}

You find all WebElements with li tag who are children of WebElement with class ull, and the iterate over the list and take the href attribute.

Answer 2

You can use Html Agility Pack

Html Agility Pack Examples:

 HtmlDocument doc = new HtmlDocument();
 doc.Load("file.htm");
 foreach(HtmlNode link in doc.DocumentElement.SelectNodes("//a[@href"])
 {
    HtmlAttribute att = link["href"];
    att.Value = FixLink(att);
 }
 doc.Save("file.htm");

Links :

How to use HTML Agility pack

http://www.mikesdotnetting.com/article/273/using-the-htmlagilitypack-to-parse-html-in-asp-net http://www.codeproject.com/Articles/691119/Html-Agility-Pack-Massive-information-extraction-f

I hope this information will help

Answer 3

For better understanding

Substring(a,b)

• a : from where you want to start your Substring
• b : what will be the length of the Substring

In your ex you take:

a as start index of ul

b as end index of ul // Error b will be the length from string start to end of ul!

you need to do is:

int c = b - a // (will give you the inner text length)

_codeHtml = _codeHtml.Substring(a,c);