public EduAnswerEntity Get(string id)
{
var entity = eduAnswerEntities.Find(id);
_context.Entry(entity).State = EntityState.Detached;
return(entity);
}
public void Adicionar(T entidad)
{
if (_context.Entry(entidad).State != EntityState.Detached)
{
_context.Entry(entidad).State = EntityState.Added;
}
else
{
_context.Set <T>().Add(entidad);
}
}
public int Update <T>(T t) where T : class
{
PropertyInfo updateDate = typeof(T).GetProperty("UpdateDate");
if (updateDate != null)
{
updateDate.SetValue(t, DateTime.Now);//默认修改时间
}
//typeof(T).GetProperty("UpdateID").SetValue(t, _cacheManager.Get<User>(CacheKeyEnum.CurrentUserKey)?.ID ?? 0);
_dbContext.Entry <T>(t).State = EntityState.Modified;
return(SaveChanges());
}
public static TEntity Attach <TEntity>(this System.Data.Entity.DbContext dbContext, TEntity entity, bool isNew) where TEntity : class
{
if (isNew)
{
entity = dbContext.Set <TEntity>().Add(entity);
dbContext.Entry(entity).State = EntityState.Added;
}
else
{
entity = dbContext.Set <TEntity>().Attach(entity);
dbContext.Entry(entity).State = EntityState.Modified;
}
return(entity);
}
public void Update(TEntity entity)
{
if (entity == null)
{
throw new ArgumentNullException("entity");
}
Dbset.Attach(entity);
m_dataContext.Entry(entity).State = EntityState.Modified;
}
private void ChangeState(T entity, EntityState state)
{
var entry = _context.Entry(entity);
if (entry.State == EntityState.Detached)
{
_context.Set <T>().Attach(entity);
}
entry.State = state;
}
public void Update(T entity)
{
try
{
if (entity == null)
{
throw new ArgumentNullException("entity");
}
Dbset.Attach(entity);
_dataContext.Entry(entity).State = EntityState.Modified;
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 获取给定实体的 <see cref="DbEntityEntry"/> 对象，以便提供对与该实体有关的信息的访问以及对实体执行操作的功能。
/// <para>参数 <paramref name="updateValues"/> 指示在找到该实体对象后是否根据传入的 <paramref name="entity"/> 实体值更新找到的对象。</para>
/// </summary>
/// <param name="_this"></param>
/// <param name="entity"></param>
/// <param name="updateValues"></param>
/// <returns></returns>
public static DbEntityEntry FindEntry(this System.Data.Entity.DbContext _this, object entity, bool updateValues)
{
Check.NotNull(entity);
DbEntityEntry entry = _this.Entry(entity);
if (entry.State == EntityState.Detached)
{
Type entityType = entity.GetType();
var entries = (from item in _this.ChangeTracker.Entries()
where item != null && item.Entity != null
let type = item.Entity.GetType()
where type == entityType || type.IsSubclassOf(entityType) || entityType.IsSubclassOf(type)
select item).ToArray();
if (entries.Length > 0)
{
EntityTable table = GetEntityTable(_this, entityType);
if (table != null)
{
var properties = table.ModelType.KeyProperties;
var temp = entries.FirstOrDefault(
item =>
{
return(properties.All(
property =>
{
return object.Equals(item.Property(property.Name).CurrentValue, entry.Property(property.Name).CurrentValue);
}));
});
if (temp != null)
{
if (updateValues)
{
temp.CurrentValues.SetValues(entity);
}
entry = temp;
}
}
}
}
return(entry);
}
/// <summary>
/// 获取给定实体的 <see cref="DbEntityEntry<TEntity>"/> 对象，以便提供对与该实体有关的信息的访问以及对实体执行操作的功能。
/// <para>参数 <paramref name="updateValues"/> 指示在找到该实体对象后是否根据传入的 <paramref name="entity"/> 实体值更新找到的对象。</para>
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="_this"></param>
/// <param name="entity"></param>
/// <param name="updateValues"></param>
/// <returns></returns>
public static DbEntityEntry <TEntity> FindEntry <TEntity>(this System.Data.Entity.DbContext _this, TEntity entity, bool updateValues)
where TEntity : class, new()
{
Check.NotNull(entity);
DbEntityEntry <TEntity> entry = _this.Entry(entity);
if (entry.State == EntityState.Detached)
{
var entries = (from item in _this.ChangeTracker.Entries <TEntity>()
where item != null && item.Entity != null
select item).ToArray();
if (entries.Length > 0)
{
EntityTable table = GetEntityTable <TEntity>(_this);
if (table != null)
{
var properties = table.ModelType.KeyProperties;
var temp = entries.FirstOrDefault(
item =>
{
return(properties.All(
property =>
{
return object.Equals(item.Property(property.Name).CurrentValue, entry.Property(property.Name).CurrentValue);
}));
});
if (temp != null && updateValues)
{
if (updateValues)
{
temp.CurrentValues.SetValues(entity);
}
entry = temp;
}
}
}
}
return(entry);
}
public void Detach(TEntity entity)
{
context.Entry <TEntity>(entity).State = EntityState.Detached;
}
public static void ReloadNavigationProperty <TEntity, TElement>([NotNull] this SystemDbContext thisValue, TEntity entity, Expression <Func <TEntity, ICollection <TElement> > > navigationProperty)
where TEntity : class
where TElement : class
{
thisValue.Entry(entity).Collection(navigationProperty).Query();
}
public static Task ReloadAsync <TEntity>([NotNull] this SystemDbContext thisValue, TEntity entity, CancellationToken cancellationToken)
where TEntity : class
{
return(thisValue.Entry(entity).ReloadAsync(cancellationToken));
}
public void Delete(FileInfoEntity entity)
{
_context.Entry(entity).State = EntityState.Deleted;
_context.SaveChanges();
}
public void Update(T item)
{
ctx.Entry(item).State = System.Data.Entity.EntityState.Modified;
ctx.SaveChanges();
}
public static void ForceRefresh <TEntity>([NotNull] this SystemDbContext thisValue, TEntity entity)
where TEntity : class
{
thisValue.Entry(entity).State = EntityState.Detached;
}
public static void ForceUpdate <TEntity>([NotNull] this SystemDbContext thisValue, TEntity entity)
where TEntity : class
{
thisValue.Entry(entity).State = EntityState.Modified;
}
public static void Reload <TEntity>([NotNull] this SystemDbContext thisValue, TEntity entity)
where TEntity : class
{
thisValue.Entry(entity).Reload();
}
public void Insert(T entity)
{
db.Entry(entity).State = EntityState.Added;
db.SaveChanges();
}
public TEntity Update(TEntity entity)
{
_context.Entry(entity).State = EntityState.Modified;
return(entity);
}
