如何使用'SUM'计算amount1和amount2？

Question

如何使用'SUM'计算我的结果中的amount1和amount2，sum2？

 var sum2 = (from p in db.tbl_relacijes  
           select p);  

 Button12.Text = (sum2.Sum());

Answer 1

我假设relacijes有两列amount1和amount2

Button12.Text=sum2.Sum(a=>a.amount1 + a.amount2).ToString();

Answer 2

很难确定你在问什么，假设表中的amount1和amount2列？

Button12.Text = sum2.Sum(row => row.amount1 + row.amount2).ToString();

Answer 3

我必须说我真的没有问题，但也许这就是你要找的东西？

var sum2 = (from p in db.tbl_relacijes  
           select p);  

 Button12.Text = (sum2.Sum(t => t.amount1 + t.amount2)).ToString();