Question

I’m trying to bind columns from two different tables in to gridview using Linq To Sql

Here’s the bind:

var q = (from o in mail.tblmails
join c in mail.tblstaffs on o.staffId equals c.id
select new { o, c });
return View(q);

and here is where I’m calling the bind in my View.

.Columns(columns =>
{

       columns.Bound(o => o.dateAdded).Format("{0:MM/dd/yyyy}").Width(80);
       columns.Bound(o => o.companyId);
       //columns.Bound(c => c.staffId);
       columns.Bound(o => o.subject);
       columns.Bound(o => o.dateArchived);

   })

I’m getting an error

Exception Details: System.InvalidOperationException: The model item passed into the dictionary is of type ‘System.Data.Linq.DataQuery1[<>f__AnonymousType06[System.Nullable1[System.DateTime],System.Nullable1[System.Int32],System.String,System.Nullable1[System.DateTime],System.String,System.Int32]]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable1[ffs.Models.tblmail]’.

I have a feeling that the issue may have something to do with the line

< % Page Title=”” Language=”C#” MasterPageFile=”~/Views/Shared/Site.Master” Inherits=”System.Web.Mvc.ViewPage>”%>

but I’m not sure what to do to fix it.

I’m using the telerik grid extension.

Any help would be great, thanks.

Answer 1

What you are doing now (and doing wrong also) is sending the query data directly to the view. This is considered bad practice. Although possible to acces the resulting anonymous type, this method will cause to do your data acces during the view instead of in the controller.

What I recommend is you make a model (class) to represent the data and return a list of those entities (your model) to the view using:

<% Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" 
Inherits="System.Web.Mvc.ViewPage<List<yourCreatedModelClass>>"%>

Watch the part where you tell the view you are handing it a list of your objects rather than just a clean view.

Some related problem and solution is discussed here