How to return a list in Entity Framework?
entity-framework
Question
I am trying to write a simple function that returns a list, but I keep getting an error at last line of code (return query.ToList()). Can anyone please help me to resolve this issue.
This is the code.
Thanks.
List<POS2012.Models.Entities.Products> GetItemOrPack(String ProductId, bool Ischecked)
{
using(var db = new POSContext())
{
var query = (from c in db.Product
where c.ProductId == ProductId
select new { c.PackCostPrice, c.PackSalePrice});
return query.ToList();
}
}
Accepted Answer
The type you select in your query does not match the return type.
Try this, it will select the appropiate type in your query, so that the conversion ToList() is possible.
using(var db = new POSContext())
{
var query = (from c in db.Product
where c.ProductId == ProductId
select new POS2012.Models.Entities.Products ()
{
PackCostPrice = c.PackCostPrice,
PackSalePrice = c.PackSalePrice
});
return query.ToList();
}
Alternative:
using(var db = new POSContext())
{
return (from c in db.Product
where c.ProductId == ProductId
select c).ToList();
}
Popular Answer
You need to use your method return type instead of anonymous type:
List<POS2012.Models.Entities.Products> GetItemOrPack(String ProductId, bool Ischecked)
{
using(var db = new POSContext())
{
var query = (from c in db.Product
where c.ProductId == ProductId
select newPOS2012.Models.Entities.Products{
PackCostPrice = c.PackCostPrice,
PackSalePrice = c.PackSalePrice});
return query.ToList();
}
}
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