Saturday, 15 June 2013

LINQ to SQL, sorting by a related table -


I am trying to use values ​​in a related table.

I have 2 tables, menus and menus are related to one from the menu. MenuID == MenuID == MenuID

Currently, I am pulling this information using the following information

  var menus = m to _context.Menus;  

This is fed into a page and works fine.

I want to be able to sort the column menu section. Order

I have tried to do this:

  var menus = m to _context.Menus include in MS at _context.MenuSections m.MenuId ms.MenuId's Equals ms.Order ascending selection meter;  

But it is returning a set of data that is incorrect, it displays information about the menu repeatedly.

EDIT: To clarify what data I'm hoping for:

The menu has an X menu.

Each menu has several menu expressions

I want to list each menu and their respective menu searches. MenuSections should be in order based on MenuSection.Order. Order

  Menu 1 - Menu 1, Order = 1 - Menu Section 3, Order = 2 Menu 2 - Menu address 4, Order = 1 - Menu address 2, Final = 2  

round 3: This makes it very clear for the question Looks like you really need a group-by It's hard to get them right without IntelliSense, but I will try my best:

  var groupings = m to _context. Menu order m.foo ms in m.MenuSections by order ms.Order M by Group MS; Foreign (group group) {menu menu = group. Of; Use the // menu foreach (group in menuSection ms) {// menuSection}}  

Now I have an extra orderby m.Foo where < Code> Foo is something I think you might want to do on menu otherwise you are not guaranteed to know the command of top level menu.

Also note that what I was saying earlier was that m.MenuSections is really helpful in MS by _context.MenuSections where ms.MenuId == m.MenuId .


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