如何在 ASP.net 中的 Lambda 表达式中传递一个或多个 arguments

Question

var itemInventoryUpdate2 = db.ItemInventoryDatas
     .Single(items => items.ItemId == item.ItemId );

Hi How can I convert above code so that I can pass to multiple arguments like it will select not just for Item Id but also for the location Id.

Answer 1

use AND operator.

  var itemInventoryUpdate2 = db.ItemInventoryDatas.Single(items => items.ItemId == item.ItemId && items.LocationId == item.LocationId);

Answer 2

You can use boolean logical operators inside lambdas:

var itemInventoryUpdate2 = db.ItemInventoryDatas
     .Single(items => items.ItemId == item.ItemId && items.LocationId == item.LocationId);

Also if you want to concatenate multiple AND conditions you can specify multiple Where clauses:

var itemInventoryUpdate2 = db.ItemInventoryDatas
     .Where(items => items.ItemId == item.ItemId)
     .Where(items => items.LocationId == item.LocationId)
     .Single();