如何左連接兩個Datables？

Question

在這裏，我我的情景

我必須首先確定年代：表A

SerialNumber PartNumber 
    001    A 
    002    B 

     var TableA = (from p in ddata.AsEnumerable() 
       join q in Select.AsEnumerable() 
        on p.Field<string>("SerialNumber") equals q.Field<string>("SerialNumber") 
        select new 
        { 
         SerialNUmber = q["SerialNumber"], 
         PartNumber = q["PartNumber"], 
         UnitStatus = "HOT" 
       }).ToList(); 

二表：表B

SerialNumber PartNumber 
001    A 
002    B 
003    C 
004    D 

    var merger = (from w in ddata.AsEnumerable() 
           select new 
           { 
            SerialNUmber = w["SerialNumber"], 
            PartNumber = w["PartNumber"], 
            UnitStatus = "COLD" 
           }).ToList(); 

要求：

加入的兩個DataTable和顯示結果情況下，如果連續出版物等於兩個表，則狀態爲熱其他正常。

SerialNumber PartNumber Status 
001    A   HOT 
002    B   HOT 
003    C   NORMAL 
004    D   NORMAL 

這是可能的嗎？感謝Regrads？

Answer 1

雖然我使用'相交'，'除外'和'聯盟'而不是左連接，但這絕對是可能的。我希望是可以接受的：

var both = list1.Intersect(list2); 
var ret = both 
       .Select(x => new { SerialNumber = x.SerialNumber, PartNumber = x.PartNumber, Status = "HOT" }) 
       .Union(
        list1.Union(list2).Distinct() 
         .Except(both) 
         .Select(x => new { SerialNumber = x.SerialNumber, PartNumber = x.PartNumber, Status = "NORMAL" }) 
      ) 

LinqPad測試：

var list1 = new [] { 
new { SerialNumber = 1, PartNumber = "A" }, 
new { SerialNumber = 2, PartNumber = "B" }, 
}; 

var list2 = new [] { 
new { SerialNumber = 1, PartNumber = "A" }, 
new { SerialNumber = 2, PartNumber = "B" }, 
new { SerialNumber = 3, PartNumber = "C" }, 
new { SerialNumber = 4, PartNumber = "D" }, 
}; 

var both = list1.Intersect(list2); 
both 
    .Select(x => new { SerialNumber = x.SerialNumber, PartNumber = x.PartNumber, Status = "HOT" }) 
    .Union(
     list1.Union(list2).Distinct() 
      .Except(both) 
      .Select(x => new { SerialNumber = x.SerialNumber, PartNumber = x.PartNumber, Status = "NORMAL" }) 
    ) 
.Dump(); 

返回：

SerialNumber PartNumber Status 
1   A   HOT 
2   B   HOT 
3   C   NORMAL 
4   D   NORMAL