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Cannot implicitly convert type 'System.Collections.Generic.List<AnonymousType#1>' to 'System.Collections.Generic.List<string>'

debugcn Published at Dev

27

Blerta

I am getting following error

Cannot implicitly convert type
'System.Collections.Generic.List<AnonymousType#1>' to
'System.Collections.Generic.List<string>'

I tried reading similar questions on stack overflow but didn't find a solution. My code is as below

var head =     
    from key in doc.Descendants("Header").Descendants("Article")
    select new 
     {
       value = (key.Value == String.Empty ?
       from q in doc.Descendants("Header").Descendants("Article") select q.Value : from a in doc.Descendants("Header").Descendants("Article") 
      select a.Attribute("DefaultValue").Value)

    };
List<string> hsourceFields = head.ToList();

If the value of xml node is empty I am reading the default value specified for that xml node

<Header>      
<Article>News</Article>
<Article DefaultValue ="Sport"></Article>    
</Header>

I want to be able to return a List which I am not able to by getting the error.

enter image description here

Josh

Looks like your code was getting a List<AnonType{value = List<string>}> instead of a List<string>

I think you want something like this that will select the text from an article or if that is empty it will take the value of the DefaultValue attribute. Note this doesn't handle when there is no text and no attribute.

var head =     
    from key in doc.Descendants("Header").Descendants("Article")
    select      
      string.IsNullOrEmpty(key.Value) ?
          key.Attribute("DefaultValue").Value :
          key.Value;
List<string> hsourceFields = head.ToList();

Or a slightly abbreviated version that uses xpath and method chains

var hsourceFields = doc.XPathSelectElements("/Header/Article")
     .Select (x => string.IsNullOrEmpty(x.Value) ?
        x.Attribute("DefaultValue").Value :
        x.Value).ToList()

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edited at2021-06-26

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