[英]LINQ query to get recursive category structure and products of each category
[英]linq to SQL category sub category count Recursive
產品
ID類別ID名稱...
類別 ID ParentCategoryID名稱
產品> CategoryID =外鍵
public class NameIDCount
{
public int ID {get;set;}
public string Name { get;set;}
public int Count { get;set;}
}
public class NameIDCountList
{
public NameIDCount _Category { get; set; }
public List<NameIDCount> _SubCategories { get; set; }
}
怎么做
Linq查詢?
List<NameIDCountList> NameIDCountList =
LINQ嗎?
結果:
<a href="/category/id=1">PC [23]</a>
<a href="/category/id=4">NoteBook [2]</a>
<a href="/category/id=5">Desktop [21]</a>
<a href="/category/id=2">Monitor [6]</a>
<a href="/category/id=8">LED Monitor [4]</a>
<a href="/category/id=9">LCD Monitor [2]</a>
試試這個
var nameidlist = new List<NameIDCount>
{
new NameIDCount{ID=1,Name="PC", Count =1},
new NameIDCount{ID=2,Name="PC", Count =1},
new NameIDCount{ID=3,Name="PC", Count =1},
new NameIDCount{ID=4,Name="Monitor", Count =1}
};
var nl = new List<NameIDCount>();
nameidlist.GroupBy(x => x.Name, p => p.ID).ToList().ForEach((y) =>
{
nl.Add(new NameIDCount { Count = y.ToList().Count, Name = y.Key });
});
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