LINQ to SQL C＃中的SELECT COUNT＃

Question

如何使用COUNT编写LINQ to SQL？

例子：

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

我怎样才能得到这里的计数？

Answer 1

就像那个

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

或更容易

var purchCount = myBlaContext.purchases.Count() 

Answer 2

你应该能够做到在PURCH变量计数：

purch.Count(); 

例如

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

purch.Count();