使用GroupBy并基于条件显示不同的和-LINQ Lambda表达式

我有一个有三列的表

我想展示一个具有以下结构的表格：

有人能告诉我如何使用Lambda表达式吗

到目前为止，如果我只想显示一列，我只能得到结果：

var sum_data = _context.HechosFinanza
                .Where(x => x.Product.Sale_Type == "Cash Sale")
                .GroupBy(x => x.Product.Product_Name)
                .Select(x => Product { Tienda = x.Key, Total = x.Sum(s => 
s.sales_amount) });

我不知道这样的事情是否可能真的不知道，只是想弄明白：

var sum_data = _context.HechosFinanza
                // I remove there where condition from here
                .GroupBy(x => x.Product.Product_Name)
                // And I add the where condition in each sum
                .Select(x => Product { Tienda = x.Key, 
                         TotalCash = x.Sum(s => s.sales_amount).Where(s => s.Product.Sale_Type == "Cash Sale"),
                         TotalCredit = x.Sum(s => s.sales_amount).Where(s.Product.Sale_Type == "Credit Sale") 
                });

---

嗯，嗯。结果我真的很接近

只需要把“Where”语句放在前面

答复:

var sum_data = _context.HechosFinanza
                // I remove there where condition from here
                .GroupBy(x => x.Product.Product_Name)
                // And I add the where condition in each sum
                .Select(x => Product { Tienda = x.Key, 
                         TotalCash = x.Where(s => s.Product.Sale_Type == "Cash Sale").Sum(s => s.sales_amount),
                         TotalCredit = x.Where(s.Product.Sale_Type == "Credit Sale") .Sum(s => s.sales_amount)
            });

完成了