中篩選這個Linq查詢

Question

我想利用這個查詢：

var queryData = from va in xdoc.Descendants("language") 
       select new 
       { 
        StringID = va.Parent.Parent.Attribute("id").Value, 
        Language = va.Attribute("name").Value, 
        LanguageData = va.Element("value").Value, 
       }; 

var organizedData = from x in queryData 
        group x by x.StringID into xg 
        select new 
        { 
         StringID = xg.Key, 
         English = xg.SingleOrDefault(x => x.Language == "ENGLISH_US").LanguageData, 
         Custom = xg.SingleOrDefault(x => x.Language == languageBox.SelectedItem.ToString()).LanguageData, 
        }; 

mainView.DataSource = organizedData.ToList(); 
mainView.Refresh(); 

不同的是，什麼是對Custom匿名類型檢索，其值必須等於"*"一個附加條件。

爲什麼我不能解決這個問題？我想我對匿名類型或=>運營商瞭解不夠。

Answer 1

這就是你想要的嗎？

mainView.DataSource = organizedData.Where(x => x.Custom == "*").ToList(); 

Answer 2

我想這就是你要找的。我把這個值放在一個臨時變量中，所以不需要計算兩次。

 var organizedData = from x in queryData 
          group x by x.StringID into xg 
          let temp = xg.SingleOrDefault(x => x.Language == languageBox.SelectedItem.ToString()).LanguageData 
          where temp == "*" 
          select new 
          { 
           StringID = xg.Key, 
           English = xg.SingleOrDefault(x => x.Language == "ENGLISH_US").LanguageData, 
           Custom = temp, 
          };