LINQ to SQL C中的SELECT COUNT#

Question

如何用COUNT编写LINQ to SQL？

例:

var purch = from purchase in myBlaContext.purchases
            select purchase;

我怎么能在这里得到点数？

Answer 1

像那样

var purchCount = (from purchase in myBlaContext.purchases select purchase).Count();

甚至更容易

var purchCount = myBlaContext.purchases.Count()

Answer 2

您应该可以对purch变量进行计数:

purch.Count();

例如

var purch = from purchase in myBlaContext.purchases
select purchase;

purch.Count();