/// <summary>
/// Updates changes of the existing entity.
/// The caller must later call SaveChanges() on the repository explicitly to save the entity to database
/// </summary>
/// <typeparam name="TEntity">The type of the entity.</typeparam>
/// <param name="entity">The entity.</param>
public void Update <TEntity>(TEntity entity) where TEntity : class
{
EFDbContext dbContext = GetEFDbContext <TEntity>();
System.Data.Entity.Core.Objects.ObjectContext objContext = dbContext.ObjectContext;
var fqen = GetEntityName <TEntity>();
System.Data.Entity.Core.EntityKey key = objContext.CreateEntityKey(fqen, entity);
object originalItem;
if (objContext.TryGetObjectByKey(key, out originalItem))
{
System.Data.Entity.Core.EntityKeyMember[] keys = key.EntityKeyValues;
foreach (System.Data.Entity.Core.EntityKeyMember keyMember in keys)
{
PropertyInfo entityKeyProperty = entity.GetType().GetProperty(keyMember.Key);
PropertyInfo originalKeyProperty = originalItem.GetType().GetProperty(keyMember.Key);
if (entityKeyProperty != null && originalKeyProperty != null)
{
object originalKeyValue = originalKeyProperty.GetValue(originalItem, null);
entityKeyProperty.SetValue(entity, originalKeyValue, null);
}
}
objContext.ApplyCurrentValues <TEntity>(key.EntitySetName, entity);
}
}
public TEntity GetByKey <TEntity>(object keyValue) where TEntity : class
{
EFDbContext dbContext = GetEFDbContext <TEntity>();
System.Data.Entity.Core.Objects.ObjectContext objContext = dbContext.ObjectContext;
System.Data.Entity.Core.EntityKey key = GetEntityKey <TEntity>(keyValue);
if (objContext.TryGetObjectByKey(key, out object originalItem))
{
return((TEntity)originalItem);
}
return(default(TEntity));
}