使用LINQ使用两个键列来连接两个数据表

Question

数据表A：

Key1 | Key2 | A |乙

[1 1 ...]

[1 2 ...]

数据表B：

Key1 | Key2 | x | ÿ

[1 1 ...]

[1 2 ...]

期望的结果：

Key1 | Key2 | A | B | X | ÿ

[1 1 ...]

[1 2 ...]

在最终结果中，列A，B，X和Y已添加到新数据表中。之所以发生这种情况，是因为key1和key2在数据表A和B中都相等。在给定条件的情况下，这可能与完全外连接有关 - （Key1和Key2是euqal）？

Answer 1

试试这位代码朋友：

override   func drawRect(rect: CGRect) {
  UIColor.greenColor().setFill();
}

Answer 2

NoReverseMatch: Reverse for 'upload' with arguments '()' and keyword arguments '{u'token': u'1234'}' not found. 0 pattern(s) tried: []

假设Key1和Key2为var list1 = (from t1 in dataTable1.AsEnumerable() select new { Key1 = t1.Field<int>("Key1"), Key2 = t1.Field<int>("Key2"), A = t1.Field<string>("A"), B = t1.Field<string>("B") }); var list2 = (from b in dataTable2.AsEnumerable() select new { Key1 = b.Field<int>("Key1"), Key2 = b.Field<int>("Key2"), X = b.Field<string>("X"), Y = b.Field<string>("Y") }); // Now join the 2 collections and get the result you want. var result = (from x in list1 join y in list2 on new { x.Key1,x.Key2} equals new { y.Key1,y.Key2 } select new { A = x.A, X = y.X }).ToList(); 类型且A.B，X和Y为int类型。