如何在使用LINQ的c＃中加入兩個列表<string>

Question

從SharePoint Web服務返回的XML元素z：行中有2個單獨的國家/地區屬性。

var homeCountry = (from xml in doc.Descendants(z + "row") select xml.Attribute("ows_Country").Value).Distinct(); 

    var covCountry = (from xml in doc.Descendants(z + "row") 
         where xml.Attribute("ows_Coverage_x0020_Area_x0020_by_x00").Value != "" 
         select xml.Attribute("ows_Coverage_x0020_Area_x0020_by_x00").Value); 

現在我想合併兩個列表，以獲得不同的國家名稱並加載dropdow dox。

distinctCountriesList.Add(""); 
     distinctCountriesList.Sort(); 
     country.DataSource = distinctCountriesList.Distinct(); 

     country.DataBind(); 

Answer 1

var distinctCountriesList = homeCountry.Union(covCountry).ToList(); 

Answer 2

使用Union method。相反，Concat不會過濾重複項。

Answer 3

country.DataSource = homeCountry 
    .Union(convCountry) 
    .ToList(); 

country.DataBind(); 

Answer 4

var Joinedlist = from hCountry in homeCountry.AsEnumerable() 
       join coCountry in covCountry.AsEnumerable() 
       on coCountry.<column Name> equals hCountry.<column Name>