這個查詢語法如何翻譯成方法語法？
var query =
from a in _dbContext.A
from b in a.B.DefaultIfEmpty()
from c in a.C.DefaultIfEmpty()
group new { b, c } by new
{
Id = a.Id.ToString(),
a.Name,
//...
} into g
select new SomeDto
{
Id = g.Key.Id,
Name = g.Key.Name,
//...
};
uj5u.com熱心網友回復：
嗯，這是它在方法鏈語法中的樣子：
var uglyQuery = _dbContext.A
.SelectMany(a => a.B.DefaultIfEmpty(), (a, b) => new { a, b })
.SelectMany(t => t.a.C.DefaultIfEmpty(), (t, c) => new { t, c })
.GroupBy(x => new
{
Id = x.t.a.Id.ToString(),
x.t.a.Name,
//...
}, x => new { x.t.b, x.c })
.Select(g => new SomeDto
{
Id = g.Key.Id,
Name = g.Key.Name,
//...
});
請注意，此轉換ReSharper在背景關系選單中可用Convert to LINQ method chain.
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