c# Regex img src
Question
I want to get the links to the images from the img src in the html. I have a string of the html that I read into a method which returns an arraylist of the image urls.
Into the method I pass the string of html and the url of the webpage.
I need some help with the regex to get the image name with the extension. If you can help with matching against the html string that would be a bonus. I will accept the right answer or close to it, thank you all.
I heard about HTML parsers but I would rather use this way thank you.
here is my method:
private ArrayList GetImageLinks(String inputHTML, String link)
{
ArrayList imageLinks = new ArrayList();
var regex = new Regex(@"<img.*?src=[\"'](.+?)[\"'].*?");
//using http://gskinner.com/RegExr/ this regex seems to get: <img src="beach.png" for example. while I need just beach.png.
//match the regex to the html and get all the image links like: image5.png
//link = inputHTML + link
//add new link to arraylist
return imageLinks;
}
3 answers
solution1
2 2013-11-25 11:07:10
I did not understand what you want to do with image source after extracting.
Here is how you can extract image links.
static IEnumerable<String> GetImageLinks(String inputHTML, String someLink)
{
const string pattern = @"<img\b[^\<\>]+?\bsrc\s*=\s*[""'](?<L>.+?)[""'][^\<\>]*?\>";
foreach (Match match in Regex.Matches(inputHTML, pattern, RegexOptions.IgnoreCase))
{
var imageLink = match.Groups["L"].Value;
/* Do something from your image link here*/
yield return imageLink;
}
}
solution2
1 2013-11-25 11:29:24
You can use WebBrowser to do that instead of string manipulation
private string HtmlUpdateWithImage(string stringHtml)
{
System.Windows.Forms.WebBrowser browser = new System.Windows.Forms.WebBrowser();
browser.Navigate("about:blank");
HtmlDocument doc = browser.Document;
doc.Write(stringHtml);
if (null != browser.Document && null != browser.Document.Images && browser.Document.Images.Count > 0)
{
// Here you can get the image list browser.Document.Images
foreach (System.Windows.Forms.HtmlElement item in browser.Document.Images)
{
// To get file path for each image
string imageFilePath = item.GetAttribute("src");
// Or either you can set those values
item.SetAttribute("src","testPath");
}
}
return "<HTML>" + browser.Document.Body.OuterHtml + "</HTML>";
}
solution3
0 2015-09-02 09:22:44
If you want just take name of image, just use method GetFileName() of class Path:
string internetAddress=@"http://hello.com/a/s/s/fff.jpg";
string takeName=Path.GetFileName(internetAddress);
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