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Anthony Queen
2225
Issue with filtering columns with NULL values.
posted

I have a grid that has filtering enabled. It works great on most columns, but if the column has a NULL value anywhere, it throws an exception.

I can duplicate this using the sample here:

https://ko.infragistics.com/community/blogs/b/taz_abdeali/posts/asp-net-mvc-3-entity-framework-infragistics-jquery-grid

Add a new customer to the Northwind database, but leave some values null.

Then, modify the controller action to look like this:

         [GridDataSourceAction]
        public ActionResult CustomerList()
        {
            List<Customer> ItemList = MVC3EntityFramework.Models.CustomerModel.GetCustomerList().ToList<Customer>();
            return View(ItemList.AsQueryable<Customer>());
        }

This will cause an error when you try to filter by any of the columns that have a NULL value. You can filter by columns that do not have NULL's just fine.

If you don't use the list and simply do this, it works:

return View(MVC3EntityFramework.Models.CustomerModel.GetCustomerList());

However, in my production code, I'm using a list then returning the list as an IQueriable (similar to above).

Any ideas?

Thanks,
Tony