Exclude Property on Update in Entity Framework

Question

I\'ve been looking for a proper way to mark a property to NOT be changed when updating a model in MVC.

For example, let\'s take this small model:

cla         


        

Answer 1

I made an easy way to edit properties of entities I will share with you. this code will edit Name and Family properties of entity:

    public void EditProfileInfo(ProfileInfo profileInfo)
    {
        using (var context = new TestContext())
        {
            context.EditEntity(profileInfo, TypeOfEditEntityProperty.Take, nameof(profileInfo.Name), nameof(profileInfo.Family));
        }
    }

And this code will ignore to edit Name and Family properties of entity and it will edit another properties:

    public void EditProfileInfo(ProfileInfo profileInfo)
    {
        using (var context = new TestContext())
        {
            context.EditEntity(profileInfo, TypeOfEditEntityProperty.Ignore, nameof(profileInfo.Name), nameof(profileInfo.Family));
        }
    }

Use this extension:

public static void EditEntity(this DbContext context, TEntity entity, TypeOfEditEntityProperty typeOfEditEntityProperty, params string[] properties)
   where TEntity : class
{
    var find = context.Set().Find(entity.GetType().GetProperty("Id").GetValue(entity, null));
    if (find == null)
        throw new Exception("id not found in database");
    if (typeOfEditEntityProperty == TypeOfEditEntityProperty.Ignore)
    {
        foreach (var item in entity.GetType().GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.GetProperty))
        {
            if (!item.CanRead || !item.CanWrite)
                continue;
            if (properties.Contains(item.Name))
                continue;
            item.SetValue(find, item.GetValue(entity, null), null);
        }
    }
    else if (typeOfEditEntityProperty == TypeOfEditEntityProperty.Take)
    {
        foreach (var item in entity.GetType().GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.GetProperty))
        {
            if (!item.CanRead || !item.CanWrite)
                continue;
            if (!properties.Contains(item.Name))
                continue;
            item.SetValue(find, item.GetValue(entity, null), null);
        }
    }
    else
    {
        foreach (var item in entity.GetType().GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.GetProperty))
        {
            if (!item.CanRead || !item.CanWrite)
                continue;
            item.SetValue(find, item.GetValue(entity, null), null);
        }
    }
    context.SaveChanges();
}

public enum TypeOfEditEntityProperty
{
    Ignore,
    Take
}