Select All Rows Using Entity Framework

Entity Framework selects a single row value.

Entity Framework from.NET 3.5 is what I'm using....I have two tables that are connected 0-1 to many. Say the words Citizen and City. Each citizen is linked to the city through a foreign key column (ID)....I must additionally choose the city where he resides when I choose single citizen. In order to conserve some bandwidth, I don't want to fetch the...

Using Entity Framework to insert many rows into a table

I now use entity framework 5.... When utilizing:...objectcontext.Add(yourobject1); objectcontext.Add(yourobject2); objectcontext.SaveChanges(); ...then the database will only have the latest of your objects....However, if you'll use:...objectcontext.Entry(yourobject1).State = System.Data.EntityState.Added; objectcontext.Entry(yourobject2).State = S...

Row size exceeds the maximum row size of 8060 in Entity Framework.

I have a thing with a binary datatype and a matching binary datatype....varbinary(max)... in SQL Server's column. EF produces this...CREATE TABLE [dbo].[Attachments] ( [Id] INT IDENTITY(1,1) NOT NULL, [FileName] NVARCHAR(255) NOT NULL, [Attachment] VARBINARY(MAX) NOT NULL ); ...When I make calls,....SaveChanges()... I get a mistake fro...

Select * from Entities where Id = (select max(Id) from Entities) in Entity Framework

The Id column is a main key and indexed, therefore this should be performant from a simplicity standpoint since it doesn't need two round trips via EF to the SQL server. You always want to run queries as few times as possible for latency....using(var db = new DataContext()) { var maxEntity = db.Entities.OrderByDecending(x=>x.Id).FirstOrDefault() } ...

Entity Framework 4.1: How to choose a row(object) based on the maximum value of a field

Besides the first response, another option is:...Profile profile = db.Profiles.OrderByDescending(p => p.RollNumber).FirstOrDefault();

Entity Framework - select group by, select max date

The most current Entity Framework producing IQuerable...I've finally found what works for me:... return from e in _ctx.Notes group e by e.ParentNoteId into g select g.OrderByDescending(e => e.Created).FirstOrDefault() into r select new NoteBrief { Id = r.Id, ...

Entity Framework Select Row

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How to get the latest row in a table using Entity Framework (considering performance)?

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Get single row using Entity Framework without getting all data

Nothing on the database will actually be executed by this line:...context.tbl1.Where(obj => obj.name == "Robin Banks") ...The result will be an...IEnumerable<tbl1>... which, when put to use, will be carelessly assessed. You must carry out an enumeration on the database in order to actually run a query on it....IEnumerable<tbl1>... (e.g. a...foreach...

To delete a row from a table of only foreign keys using Entity Framework

You may resolve this dilemma in the same manner that I did. In order to address this problem, I nearly always add an additional column to tables that only contain foreign keys....var license = db.Licenses.Where(l => l.ID == LicenseId).FirstOrDefault(); var users = license.Users.ToList(); if (users != null) { foreach (var user in users) { ...