linq - 林克 | 如何在不分组的情况下获得 SUM？

Question

疯狂的问题......但是，我想要列的表中所有行的总和（不使用 group by 子句）

例子：

Table = Survey
Columns = Answer1, Answer2, Answer3
        1        1         1
        4        3         5
        3        3         2

我想要每列的总和。

最终结果应如下所示：

Answer1Sum  Answer2Sum  Answer2Sum

8           7           8

---

这不起作用：

from survey in SurveyAnswers
select new
{
    Answer1Sum = survey.Sum(),
    Answer2Sum = survey.Sum(),
    Answer3Sum = survey.Sum()
 }

---

Answer 1

这会起作用吗：

var answer1Sum = SurveyAnswers.Sum( survey => survey.Answer1 );
var answer2Sum = SurveyAnswers.Sum( survey => survey.Answer2 );
var answer3Sum = SurveyAnswers.Sum( survey => survey.Answer3 );

Answer 2

对于任何需要它的人来说，这个答案的 VB.NET 解决方案如下：

Dim Answer1Sum = SurveyAnswers.Sum(Function(survey) survey.Answer1)
Dim Answer2Sum = SurveyAnswers.Sum(Function(survey) survey.Answer2)
Dim Answer3Sum = SurveyAnswers.Sum(Function(survey) survey.Answer3)

Answer 3

SurveyAnswers.Sum(r => r.Answer1);