Dapper : Reading directly nth item from the GridReader
dapper
Question
This what i found in dapper blog
var sql =
@"
select * from Customers where CustomerId = @id
select * from Orders where CustomerId = @id
select * from Returns where CustomerId = @id";
using (var multi = connection.QueryMultiple(sql, new {id=selectedId}))
{
var customer = multi.Read<Customer>().Single();
var returns = multi.Read<Return>().ToList();
var orders = multi.Read<Order>().ToList();
...
}
My requirement is I want to directly read only "orders" . Can I do that ?
Accepted Answer
If you don't want the other two, you can call Read without ever iterating that sequence: no objects will be materialized:
var customer = multi.Read<Customer>(); // not consumed
var returns = multi.Read<Return>(); // not consumed
var orders = multi.Read<Order>().ToList();
Popular Answer
You can use Query extension to read single, e.g.
const string sql = "select * from Orders where CustomerId = @id";
var orders = connection.Query<Order>(sql, new {id = 1}).ToList();
Edit:
To execute stored procedure:
var orders = connection.Query<Order>("GetOrders", new {id = 1}, commandType: CommandType.StoredProcedure).ToList();
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