//private static Random random = new Random();
#region 扩展基本方法
public T Find <T>(params object[] keyValues) where T : BaseModel
{
using (HContext dbContext = new HContext())
{
return(dbContext.Set <T>().Find(keyValues));
}
}
public bool Delete <T>(T entity) where T : BaseModel
{
using (HContext dbContext = new HContext())
{
dbContext.Set <T>().Attach(entity);
dbContext.Entry <T>(entity).State = EntityState.Deleted;
int result = dbContext.SaveChanges();
return(result > 0);
}
}
public T Add <T>(T entity) where T : BaseModel
{
using (HContext dbContext = new HContext())
{
dbContext.Set <T>().Attach(entity);
dbContext.Entry <T>(entity).State = EntityState.Added;
dbContext.SaveChanges();
return(entity);
}
}
public IList <T> FindAll <T, S>(Expression <Func <T, bool> > conditions, Expression <Func <T, S> > orderBy, int pageSize, int pageIndex, out long total) where T : BaseModel
{
using (HContext dbContext = new HContext())
{
IQueryable <T> source = conditions == null?dbContext.Set <T>() : dbContext.Set <T>().Where(conditions);
total = source == null ? 0 : source.Count();
return(source.OrderByDescending <T, S>(orderBy).ToPagedList(pageIndex, pageSize).ToList <T>());
}
}
public bool Update <T>(IList <T> entityList) where T : BaseModel
{
using (HContext dbContext = new HContext())
{
foreach (var entity in entityList)
{
dbContext.Set <T>().Attach(entity);
dbContext.Entry <T>(entity).State = EntityState.Modified;
}
int result = dbContext.SaveChanges();
return(result > 0);
}
}
public IList <T> Add <T>(IList <T> entityList) where T : BaseModel
{
using (HContext dbContext = new HContext())
{
foreach (T entity in entityList)
{
dbContext.Set <T>().Attach(entity);
dbContext.Entry <T>(entity).State = EntityState.Added;
}
dbContext.SaveChanges();
return(entityList);
}
}
public IList <T> FindAllWithoutPaging <T>(Expression <Func <T, bool> > conditions = null) where T : BaseModel
{
using (HContext dbContext = new HContext())
{
IList <T> entityList = null;
if (conditions == null)
{
entityList = dbContext.Set <T>().ToList();
}
else
{
entityList = dbContext.Set <T>().Where(conditions).ToList <T>();
}
return(entityList);
}
}