Question

i have a xml tag like :

<p xmlns="http://www.w3.org/1999/xhtml">Text1<span title="instruction=componentpresentation,componentId=1234,componentTemplateId=1111">CPText2CP</span></p>

If i have to replace the tag <span title="instruction=componentpresentation,componentId=1234,componentTemplateId=1111">CPText2CP</span> with

<componentpresentation componentID="1234" templateID="1111" dcpID="dcp1111_1234" dcplocation="/wip/data/pub60/dcp/txt/dcp1111_1234.txt">Text2</componentpresentation>

Is any possible way to acchive this, please give suggestion/changes.

EDIT

From the above tag can i take full <span></span> tag as a string with the text in between the tags.any suggestions.

Answer 1

You can do it like this:

        string input = @"
            <p xmlns=""http://www.w3.org/1999/xhtml"">
                Text1
                <span title=""instruction=componentpresentation,componentId=1234,componentTemplateId=1111"">
                    CPText2CP
                </span>
            </p>";


        XDocument doc = XDocument.Parse(input);
        XNamespace ns = doc.Root.Name.Namespace;

        // I don't know what filtering criteria you want to use to 
        // identify the element that you wish to replace,
        // I just searched by "componentId=1234" inside title attribute
        XElement elToReplace = doc
            .Root
            .Descendants()
            .FirstOrDefault(el => 
                el.Name == ns + "span" 
                && el.Attribute("title").Value.Contains("componentId=1234"));

        XElement newEl = new XElement(ns + "componentpresentation");

        newEl.SetAttributeValue("componentID", "1234");
        newEl.SetAttributeValue("templateID", "1111");
        newEl.SetAttributeValue("dcpID", "dcp1111_1234");
        newEl.SetAttributeValue("dcplocation", 
            "/wip/data/pub60/dcp/txt/dcp1111_1234.txt");

        elToReplace.ReplaceWith(newEl);

Your needs may vary but the way to go would be to create XDocument or XElement, search through it to find elements that need to be replaced and then use ReplaceWith to replace them. Note that you have to take namespaces into consideration, otherwise elements won’t be retrieved.