Cast Linq to SQL List to List

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I know this should be straight forward but..

I have a Ling to SQL query:

C#

var catModel = from BU in CTMapDB.TBL_DIM_BU
                           where BU.si_BUId > 0
                           select BU.vc_BUName;

which I know want to stuff into a List like so:

CSS

var items = new List<Item>(){
    new Item { ItemName = categories + " Item 1" },
    new Item { ItemName = categories + " Item 2" },
    new Item { ItemName = categories + " Item 3" },
    new Item { ItemName = categories + " Item 4" },
    new Item { ItemName = categories + " Item 5"}
};

var viewModel = new MapBrowseViewModel
{
    Category = categoryModel,
    Item = items
};

When I replace "items" in the viewModel with my Linq result of catModel I get all sorts of casting errors which I would expect. No matter what I try I can't cast catModel, which is of type IQueryable into List<item>.

Anyone have any ideas what I'm missing?

Posted 18-Oct-10 13:17pm

Don Burton

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#realJSOP · Answer 1 · 2010-10-18T14:33:00

Solution 1

have you tried this:

C#

List<Item> catModel = new List<Item>();
catModel.AddRange((from BU in CTMapDB.TBL_DIM_BU
                   where BU.si_BUId > 0
                   select BU).ToArray());

Posted 18-Oct-10 14:33pm

#realJSOP

Comments

Don Burton 19-Oct-10 13:13pm

I just tried and got some push back from the compiler:

The best overloaded method match for 'System.Collections.Generic.List<ctmapping.models.item>.AddRange(System.Collections.Generic.IEnumerable<ctmapping.models.item>)' has some invalid arguments

Argument '1': cannot convert from 'CTMapping.Models.TBL_DIM_BU[]' to 'System.Collections.Generic.IEnumerable<ctmapping.models.item>'

My frustration is all of this works in .NET 4.0 because of covariance. But not in 3.5 which is where I must remain for this project.

Thanks.

Don Burton · Answer 2 · 2010-10-28T09:47:00

Solution 2

This is what finally worked:

C#

var sqlitems = (from BU in CTMap.GetTable<TBL_DIM_BU>()
                            select new Item { ItemName = BU.vc_BUName }).ToList<Item>();

Posted 28-Oct-10 9:47am

Don Burton