EntityFramework update partial model

Question

I am working on mvc project, with repository pattern and entity framework, now on my form i have a sample model

SampleModel
1) name
2) age
3) address

Answer 1

This is an old thread, but if anyone is interested, to extend on Ladislav's solutions, we've come up with a helpful extension method for EF 4.1 and newer:

public static void SetModified(
        this DbEntityEntry entry,
        IEnumerable>> expressions) where TEntity : class, IEntity
    {
        foreach (var expression in expressions)
            entry.Property(expression).IsModified = true;
    }

Obviously you'll need to take away the IEntity constraint unless you're using an interface by the same name for your POCOs.

Example usage would be:

        var user = new User
        {
            Id = Request.Id,
            UserName = Request.UserName,
            FirstName = Request.FirstName
        };

        var expressions = new List>> 
                 { 
                     x => x.UserName, 
                     x => x.FirstName
                 };

        context.Entry(user).SetModified(expressions);