LINQ：將OrderBy添加到查詢

Question

我在我的大學項目的終點線，並且我在完成查詢時遇到困難。 工作查詢看起來是這樣的：

var Report = from query in Document.Descendants("order") 
         group query by query.Element("seller").Value 
          into qGroup 
          select new Orders 
          { 
           Seller = qGroup.Key, 
           Quantity = qGroup.Sum(p => int.Parse(p.Element("quantity").Value)).ToString() 
          }; 

我真的很感激，如果你能告訴我，如何按降序排列以便通過給定的「量」的結果。

謝謝！

Answer 1

var Report = (from query in Document.Descendants("order") 
       group query by query.Element("seller").Value into qGroup 
       select new Orders 
       { 
        Seller = qGroup.Key, 
        Quantity = qGroup.Sum(p => int.Parse(p.Element("quantity").Value)).ToString() 
       }) 
       .OrderByDescending(order => order.Quantity); 

Answer 2

請做到這一點：

var Report = (from query in Document.Descendants("order") 
          group query by query.Element("seller").Value 
          into qGroup 
          select new Orders 
          { 
           Seller = qGroup.Key, 
           Quantity = qGroup.Sum(p => int.Parse(p.Element("quantity").Value)).ToString() 
          }).OrderByDescending(x => x.Quantity); 

HTH !!!!

（榮譽給LINQ Orderby Descending Query）

Answer 3

通過斯基和安德烈工作的答案，但你也可以寫爲

var Report = from query in Document.Descendants("order") 
      group query by query.Element("seller").Value 
      into qGroup 
      let qty = qGroup.Sum(p =>int.Parse(p.Element("quantity").Value)).ToString() 
      orderby qty descending 
      select new Orders 
      { 
       Seller = qGroup.Key, 
       Quantity = qty 
      }; 

，如果你寧願讓這一切在一個語法。