Regular Expression to Extract the Url out of the Anchor Tag

Question

I want to extract the http link from inside the anchor tags? The extension that should be extracted should be WMV files only.

Answer 1

Regex:

[^\"]*.wmv)(\"|\'))\\s*>(?.*)\\s*

[Note: \s* is used in several places to match the extra white space characters that can occur in the html.]

Sample C# code:

/// 

/// Assigns proper values to link and name, if the htmlId matches the pattern
/// Matches only for .wmv files
/// 
/// true if success, false otherwise
public static bool TryGetHrefDetailsWMV(string htmlATag, out string wmvLink, out string name)
{
    wmvLink = null;
    name = null;

    string pattern = "[^\"]*.wmv)(\"|\'))\\s*>(?.*)\\s*";

    if (Regex.IsMatch(htmlATag, pattern))
    {
        Regex r = new Regex(pattern, RegexOptions.IgnoreCase | RegexOptions.Compiled);
        wmvLink = r.Match(htmlATag).Result("${link}");
        name = r.Match(htmlATag).Result("${name}");
        return true;
    }
    else
        return false;
}

MyRegEx.TryGetHrefDetailsWMV("Name of File", 
                out wmvLink, out name); // No match
MyRegEx.TryGetHrefDetailsWMV("Name of File",
                out wmvLink, out name); // Match
MyRegEx.TryGetHrefDetailsWMV("Name of File", out wmvLink, out name); // Match