new XElement, foreach loop issue.[Answered] RSS

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  mantaii

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  new XElement, foreach loop issue.

  May 15, 2015 04:34 AM|mantaii|LINK

  I'm creating a new XML document and as part of doing this I need to create a new XElement named tag with an XAttribute called ref which has a value given to it from stringTags

  I can do this for 1 item but in some cases I need to add multiple. 

  What I have so far is: 

  new XElement("tags",
  new XElement("tag",
  new XAttribute("ref", stringTags))
  )
  

  But what I need is something like

  new XElement("tags",
  new XElement("tag",
  
     foreach (string element in list)
                  {
                       new XAttribute("ref", stringTags)
                  }
  
  ));

  But this doesn't work. 

  Can anyone suggest a way of doing this - the foreach loop gives me to correct output when I place it outwith the creation of the XML doc. 

  Foreach xml

• • Reply
  Lokesh B R

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  Re: new XElement, foreach loop issue.

  May 15, 2015 05:05 AM|Lokesh B R|LINK

  Hi,

  try this code

              // Adding the Attributes to the Dictionary as Key values pairs
              Dictionary<string, string> list = new Dictionary<string, string>();
              list.Add("ref", "xml");
              list.Add("Id", "123");
  
              XElement chileElement = new XElement("tag");
  
              foreach (var item in list) // Adding each attribute to the child element
              {
                  XAttribute attribute = new XAttribute(item.Key, item.Value);
                  chileElement.Add(attribute);
              }
              XElement elem = new XElement("tags", chileElement); 

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• • Reply
  mantaii

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  Re: new XElement, foreach loop issue.

  May 15, 2015 07:50 AM|mantaii|LINK

  Hi, 
  Thanks for the quick reply. 

  I should have probably explained a bit more. 

  I have a list of the tags and I've tried to use your suggestion -

    IList<string> list = new List<string>(tags.Split(new string[]{","}, StringSplitOptions.None));
  
                  XElement childElement = new XElement("tag");
                  foreach (var item in list)
                  {
                      XAttribute attribute = new XAttribute("ref", item);
                      childElement.Add(attribute);
                  }

  The output I am trying to get is :
  
  

     <tags>
          <tag ref="Umbraco" />
          <tag ref="MVC" />
          <tag ref="IoC" />
          <tag ref="Autofac" />
        </tags>

  I import all the tags from a file which are in a list just now, which is why I then separate it. 

  I get an error saying "Duplicate Attribute" on line childElement.Add(attribute)

  Foreach xml

• • Reply
  Lokesh B R

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  Re: new XElement, foreach loop issue.

  May 15, 2015 07:55 AM|Lokesh B R|LINK

  Hi,

  Here is the sample for your requirement.

              string tags = "Umbraco,MVC,IoC,Autofac";
  
              IList<string> list = new List<string>(tags.Split(new string[] { "," }, StringSplitOptions.None));
              XElement elem = new XElement("tags");
  
              foreach (var item in list)
              {
                  XElement childElement = new XElement("tag");
  
                  XAttribute attribute = new XAttribute("ref", item);
                  childElement.Add(attribute);
  
                  elem.Add(childElement);
              }

  Foreach xml

  Mark the post as answer, if it helps you.
• • Reply
  mantaii

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  Re: new XElement, foreach loop issue.

  May 15, 2015 08:38 AM|mantaii|LINK

  Great! That has solved the issue! Thank you! 

  I added a bit extra to make it populate my file. 

   XElement elem = new XElement("tags");
  
                  foreach (var item in list)
                  {
                      XElement childElement = new XElement("tag");
  
                      XAttribute attribute = new XAttribute("ref", item);
                      childElement.Add(attribute);
  
                      elem.Add(childElement);
  
                      
                  }
                  

  Works brilliantly!

    )),
                                     new XElement("categories",
                                         new XElement("category",
                                             new XAttribute("ref", "1"))
                                         ),
  // OLD CODE THAT ONLY WORKED FOR ONE TAG
                                         //new XElement("tags",
                                         //    new XElement("tag",
                                         //        new XAttribute("ref", tags))
                                         //    ),
  // NEW Element which populates multiple tags.
                                          new XElement(elem)

  
  
  

  Foreach xml