两者之间有什么区别
1)
context.connection.open()
var albums = (from a in context.Albums
where a.id == id
select a);
context.connection.close()
2)
context.connection.open()
var albums = (from a in context.Albums
select a);
context.connection.close()
var result = albums.where((a)=>{a.id == id});
使用第一个会更快吗
最佳答案
第二句中的where子句看起来是不正确的语法,除了打开/关闭连接外,它们还应评估为相同的代码。也就是说,当实际枚举结果集时将生成并执行SQL。
您可以省略其余代码,而只需编写:
var albums = from a in context.Albums
where a.id == id
select a;
要么
var albums = context.Albums.Where(a => a.id == id);
枚举结果时,他们将对相同的事物求值。
关于c# - linq与sql where子句有何不同,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/1678643/