Recently I encountered a situation where I had to communicate between an iframe located on a different domain and its parent. Due to the “same origin policy”, a security concept for browsers, which only permits scripts running on pages originating from the same site, this was not possible to do right out of the box. [...]
Tags: html, javascript
I recently discovered an absolutely amazing HTML parsing library for .NET called HtmlAgilityPack. It completely takes away the pain of parsing complicated HTML with regular expressions. Here’s a very simple example of what you could do with it – I’m just extracting inner HTML from any element inside a HTML file which has a css [...]
protected ArrayList getURL(string txtIn) { ArrayList outURL = new ArrayList(); Regex r = new Regex(“href\\s*=\\s*(?:(?:\\\”(?<url>[^\\\"]*)\\\”)|(?<url>[^\\s]* ))”); MatchCollection mc1 = r.Matches(txtIn); foreach (Match m1 in mc1) { foreach (Group g in m1.Groups) { outURL.Add(g.Value); } } return outURL; }
This code will strip out all the HTML tags and truncate the text to 4 lines. public static string TruncateText(string txtIn, int newLength) { string txtOut = txtIn; string pattern = @”<(.|\n)*?>”; //Strip out HTML tags if (Regex.IsMatch(txtIn, pattern, RegexOptions.None)) txtOut = Regex.Replace(txtIn, pattern, string.Empty, RegexOptions.Multiline).Trim(); if (txtOut.Length > newLength) { int endPos = txtOut.LastIndexOf(” [...]