强制转换为加入对象

Question

我已加入，它返回三重对象的列表。我能以某种方式投射到这个物体的清单吗？

var result = entities.Join(...).Join(...).Join(.. new {a=a, b=b, c=c}).ToList(); 
//how to cast like: 
var multipleList = (List<{ObjectA, ObjectB, ObjectC}>)result; 

Answer 1

var multipleList = 
    result.SelectMany(x => new object[] { x.a, x.b, x.c }) 
      .ToList(); 

Answer 2

你可以像这样，创建的元组

var data = (from e in entities 
      ///code to join entities... 
      select new Tuple<ClassA, ClassB, ClassC> 
       (
        e1,//enitry of ClassA 
        e2,//enitry of ClassB 
        e3//enitry of ClassC 
       )).ToList(); 

阅读列表有关的元组在这里：Tuple Type in C#4.0