public static T Query <T>(Expression <Func <T, bool> > express) where T : class
{
using (AaronContext context = new AaronContext())
{
return(context.Set <T>().FirstOrDefault(express));
}
}
public static IEnumerable <T> QueryList <T>(Expression <Func <T, bool> > express)
where T : class
{
using (AaronContext context = new AaronContext())
{
return(context.Set <T>().Where(express).ToList());
}
}
public static void AddList <T>(List <T> list)
where T : class
{
using (AaronContext context = new AaronContext())
{
context.Set <T>().AddRange(list);
context.SaveChanges();
}
}
/// <summary>
/// 添加
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="model"></param>
public static void Add <T>(T model)
where T : class
{
using (AaronContext context = new AaronContext())
{
context.Set <T>().Add(model);
context.SaveChanges();
}
}
public static void Delete <T>(T model)
where T : class
{
//用循环,然后最后再SaveChange就可以了
using (AaronContext context = new AaronContext())
{
context.Set <T>().Add(model);
context.Entry <T>(model).State = EntityState.Deleted;
context.SaveChanges();
}
}
/// <summary>
/// 修改某一模型数据
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="model"></param>
public static void Update <T>(T model) where T : class
{
using (AaronContext context = new AaronContext())
{
if (context.Entry <T>(model).State == EntityState.Detached)
{
context.Set <T>().Attach(model);
context.Entry <T>(model).State = EntityState.Modified;
}
context.SaveChanges();
}
}
