DISTINCT on one column in LINQ to Entities

The LINQ expression node type 'Invoke' is not supported in the entity framework's LINQ to Entities.

The AsExpandable() function created by Joe Albahari and included in LINQKIT may be used to remedy this issue. He is the same person behind...PredicateBuilder... thing you're utilizing, I see....If querying with Entity Framework, change the last line to this:...return objectContext.Products.AsExpandable().Where(predicate);...You may download the LIN...

Distinct on Multiple Columns Entity Framework LINQ

It works by using anonymous objects:...var data = TESTDB.Where(i => i.ALPHA == 1).Select(i => new {i.A, i.B, i.C}).Distinct();

Linq to Entities Select Distinct

Consider adding.Distinct() to the end of your query, for example...(from r in ctx.MyTable where SomeCondition select r).Distinct(); ...http://msdn.microsoft.com/en-us/library/system.linq.enumerable.distinct.aspx...You can also offer an IEqualityComparer if necessary. However, the resulting enumerable must first be materialized with....ToEnumerable(...

Entity Framework Code First Using One column as Primary Key and another as Auto Increment Column

Additionally, you can achieve this using data annotations:...public class Sale { [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; } [Key] public string TrNo { get; set; } public DateTime Date { get; set; } public int CustomerID { get; set; } public ObservableCollection<SaleDetail> SaleDe...

Select distinct on one column only using Entity Framework Code First

The last inquiry follows our coop and is:...var query = context.Messages .Where(x => x.IsAFriendshipRequest == false && x.SentTo == userId).Include("SentByUser") .Select(x => new { User = x.SentBy, x.DateUtcSent, x.Body, Name = x.SentByUser.Name }) .Union ( context.Messages .Where(x => x.IsAFriendshipRequest == f...

Entity framework update one column by increasing the current value by one without select

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Entity Framework 6 Code First int Identity column value is zero for first row

Your concrete migration class should "somewhat" resemble the examples below:...public class 201707132034165_MyAwesomeDbInitial : DbMigration { #region <Methods> public override void Up() { CreateTable( "dbo.HasOverdrive", c => new { HasOverdriveId = c.Int(nullable: false, iden...

how to select distinct values in a column in entity framework?

To materialize the expression, add a call to ToList() at the end....var contractors = context.ManHoursWorked.Where(j => j.JOCID == jocID).Select(c => c.ContractorName).Distinct().ToList();

One-to-one and one-to-many on the same entity in Entity Framework

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Entity Framework - One-to-One - ReferentialConstraint is mapped to a store-generated column

Conventionally, EF6 uses the so-called ...Association for Shared Primary Keys... representation of one-to-one connections, where the PK of the dependent entity likewise acts as the principal entity's FK....In your situation, it takes into...Account.Id... to act as the FK...Customer... , and since it was created automatically, you received the relev...