linq-to-entities

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Unable to create a constant value of type (type) Only primitive types ('such as Int32, String, and Guid') are supported in this context

I\'ve read ALL of: Unable to create a constant value of type 'System.Object' in Entity Framework[详细]

2023-03-31 02:13 分类：问答
updating category id for the product instead of creating new id

i have two tables product product_id product_Name 开发者_开发技巧product_Price product_Description product_image[详细]

2023-03-31 00:13 分类：问答
Can you simplify this linq-to-entity groupBy query?

List<int> types = Hospitals.GroupBy(h => h.TypeId, (key, group) => group.First()) .Select(t=> y.TypeId).ToList();[详细]

2023-03-30 06:05 分类：问答
Include nested entities using LINQ

I\'m messing around with LINQ for the first time, and I\'m using EF 4.1 code first. I have entities containing nested Lists of other entities, for example:[详细]

2023-03-30 04:52 分类：问答
Entity Framework, MVC 3, OrderBy in LINQ To Entities

I\'ve got the following query: 开发者_如何学Gomodel.Page = db.Pages .Where(p => p.PageId == Id)[详细]

2023-03-30 04:49 分类：问答
nullable object must have a value in Linq

I use following Linq To Entitiy To get the first and only record of my \'siteconfig\' Entity : var site = unitofwork.SiteConfigRepository.Get().FirstOrDefault();[详细]

2023-03-30 04:25 分类：问答
Linq order by Area Name with one exception

Hi say I have objects of type Area with Names: Hokitika Dunedin开发者_开发知识库 Stewart Island West Coast[详细]

2023-03-30 03:39 分类：问答
Having a problem updating table in Linq to Entities with update statement but not updating the table

I have a form with add, edit, and save buttons. The form also has a datagridview. I have done this to update existing product entities and to add new product entities, then display the altered data i[详细]

2023-03-30 00:17 分类：问答
LINQ-to-Entities Find DateTime difference

I\'m trying to compare difference of two DateTimes in an L2E query. I know that the translation of DateTime methods to Entity Framework is really problematic, and I need a precise comparison in minute[详细]

2023-03-30 00:02 分类：问答
getting two column values from same table depending on the condition

I have two tables: table product1 with columns: product_id prodcut_name category_id another tablecategories[详细]

2023-03-29 23:39 分类：问答