CODEWITHSUNDEEP
c#
Dhanush Kodi
Dhanush Kodi

Reputation: 31

Remove empty span tags if it is in with in paragraph tags using Regex

Need to remove <span style="color:#000000;"/> tag when <span> tag is empty

<html>
   <body>       
      <p left-margin="0" style="margin:0 0 0 0;text-align:Left;font-style:italic;"><span style="color:#000000;"/></p>
      <p>Newly <span style="font-weight:bold;">Created</span> this document...</p>
      <p />
      <p>Regards,</p>
      <p>Dhanush.</p>
   </body>
</html>

Already we are using below regEx for removing unwanted XML

if (!string.IsNullOrEmpty(text))
{
    var xmlPattern = "[^\x09\x0A\x0D\x20-\xD7FF\xE000-\xFFFD\x10000-\x10FFFF]";
    return Regex.Replace(text, xmlPattern, string.Empty);
}

I need to final result like below

<html>
   <body>       
      <p left-margin="0" style="margin:0 0 0 0;text-align:Left;font-style:italic;">
      <p>Newly <span style="font-weight:bold;">Created</span> this document...</p>
      <p />
      <p>Regards,</p>
      <p>Dhanush.</p>
   </body>
</html>

Upvotes: 0

Views: 445

Answers (2)

Michał Turczyn
Michał Turczyn

Reputation: 37500

Don't use Regex for any XML parsing!

Using XDocument will suffice here:

var html = XDocument.Parse(htmlString);
var spanElements = html.Descendants("span").ToList(); 
for (int i = spanElements.Count - 1; i >= 0; i--)
    if (spanElements[i].Value == "") spanElements[i].Remove();

Upvotes: 1

er-sho
er-sho

Reputation: 9771

One approach would be to use HtmlAgilityPack instead of Regex

Use this Install-Package HtmlAgilityPack -Version 1.11.4 command in the package manager console to install nuget package for HtmlAgilityPack

Code:

HtmlDocument doc = new HtmlDocument();
doc.Load(@"Path to html file");

if (doc.DocumentNode.SelectNodes("//span") != null)
{
    foreach (HtmlNode node in doc.DocumentNode.SelectNodes("//span"))
    {
        var attributes = node.Attributes;

        foreach (var item in attributes)
        {
            if (item.Name.Equals("style") && item.Value.Contains("color:#000000;"))
            {
                node.ParentNode.RemoveChild(node);
            }
        }
    }
}

string html = doc.DocumentNode.OuterHtml;

Output: (From Debugger)

enter image description here

Upvotes: 1

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