/// <summary>
/// Gets the list of entities based on given type.
/// </summary>
/// <param name="filter">The filter criteria.</param>
/// <param name="orderBy">The ordering query.</param>
/// <param name="includeProperties">Properties to be included.</param>
/// <returns>The list of asked entities.</returns>
public virtual IEnumerable <T> Get(
Expression <Func <T, bool> > filter = null,
Func <IQueryable <T>, IOrderedQueryable <T> > orderBy = null,
string includeProperties = "")
{
using (var ctx = new LibraryDBContext())
{
var dbSet = ctx.Set <T>();
IQueryable <T> query = dbSet;
if (filter != null)
{
query = query.Where(filter);
}
foreach (var includeProperty in includeProperties.Split(
new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries))
{
query = query.Include(includeProperty);
}
if (orderBy != null)
{
return(orderBy(query).ToList());
}
else
{
return(query.ToList());
}
}
}
/// <summary>
/// Gets the entity based on given ID.
/// </summary>
/// <param name="id">The ID of the entity.</param>
/// <returns>The entity.</returns>
public virtual T GetByID(object id)
{
using (var ctx = new LibraryDBContext())
{
Log.Info("Entity with ID " + id.ToString() + " have been successfully deleted!");
return(ctx.Set <T>().Find(id));
}
}
/// <summary>
/// Inserts a given entity in the database.
/// </summary>
/// <param name="entity">The entity to be inserted.</param>
public virtual void Insert(T entity)
{
using (var ctx = new LibraryDBContext())
{
var dbSet = ctx.Set <T>();
dbSet.Add(entity);
ctx.SaveChanges();
Log.Info("Entity of type " + entity.GetType().ToString() + " have been successfully inserted!");
}
}
/// <summary>
/// Updates a given entity in the database.
/// </summary>
/// <param name="item">The modified entity.</param>
public virtual void Update(T item)
{
using (var ctx = new LibraryDBContext())
{
var dbSet = ctx.Set <T>();
dbSet.Attach(item);
ctx.Entry(item).State = EntityState.Modified;
ctx.SaveChanges();
Log.Info("Entity of type " + item.GetType().ToString() + " have been successfully updated!");
}
}
/// <summary>
/// Deletes a given entity from the database.
/// </summary>
/// <param name="entityToDelete">The entity to delete.</param>
public virtual void Delete(T entityToDelete)
{
using (var ctx = new LibraryDBContext())
{
var dbSet = ctx.Set <T>();
if (ctx.Entry(entityToDelete).State == EntityState.Detached)
{
dbSet.Attach(entityToDelete);
}
dbSet.Remove(entityToDelete);
ctx.SaveChanges();
Log.Info("Entity of type " + entityToDelete.GetType().ToString() + " have been successfully deleted!");
}
}
