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Q&A Order a subcollection from linq

If you are using .NET Core 5.0 or more you should be able to write something like the following (not tested): var data = context.TblOrder .OrderBy(o => o.OrderDate) .Select(o => ne...

posted 2y ago by Alexei‭  ·  edited 2y ago by Alexei‭

Answer
#3: Post edited by user avatar Alexei‭ · 2022-06-08T13:39:09Z (about 2 years ago)
not tested
  • If you are using .NET Core 5.0 or more you should be able to write something like the following:
  • ```c#
  • var data = context.TblOrder
  • .OrderBy(o => o.OrderDate)
  • .Select(o => new
  • {
  • Order = o,
  • OrderLines = o.TblOrderLine.OrderBy(ol => ol.ProductName)
  • });
  • ```
  • The advantage of this approach is that you can specify the exact columns you need and the query will be more efficient (`Include` gets all the columns).[]()
  • If you are using .NET Core 5.0 or more you should be able to write something like the following (not tested):
  • ```c#
  • var data = context.TblOrder
  • .OrderBy(o => o.OrderDate)
  • .Select(o => new
  • {
  • Order = o,
  • OrderLines = o.TblOrderLine.OrderBy(ol => ol.ProductName)
  • });
  • ```
  • The advantage of this approach is that you can specify the exact columns you need and the query will be more efficient (`Include` gets all the columns).[]()
#2: Post edited by user avatar Alexei‭ · 2022-06-08T13:36:31Z (about 2 years ago)
added more info
  • If you are using .NET Core 5.0 or more you should be able to write something like the following:
  • ```c#
  • var data = context.TblOrder
  • .OrderBy(o => o.OrderDate)
  • .Select(o => new
  • {
  • Order = o,
  • OrderLines = o.TblOrderLine.OrderBy(ol => ol.ProductName)
  • });
  • ```
  • If you are using .NET Core 5.0 or more you should be able to write something like the following:
  • ```c#
  • var data = context.TblOrder
  • .OrderBy(o => o.OrderDate)
  • .Select(o => new
  • {
  • Order = o,
  • OrderLines = o.TblOrderLine.OrderBy(ol => ol.ProductName)
  • });
  • ```
  • The advantage of this approach is that you can specify the exact columns you need and the query will be more efficient (`Include` gets all the columns).[]()
#1: Initial revision by user avatar Alexei‭ · 2022-06-08T13:35:37Z (about 2 years ago)
If you are using .NET Core 5.0 or more you should be able to write something like the following:

```c#
var data = context.TblOrder
    .OrderBy(o => o.OrderDate)
    .Select(o => new 
    { 
       Order = o,
       OrderLines = o.TblOrderLine.OrderBy(ol => ol.ProductName)
    });
```