/// <summary>
/// 使用泛型删除数据库中的对象, 类型参数可以是 基类, 参数model对象可以是 扩展类对象
/// </summary>
/// <typeparam name="T">基类</typeparam>
/// <param name="model">可以是扩展类对象</param>
/// <returns></returns>
public static int delete <T>(T model) where T : class
{
using (WeiQingEntities db = new WeiQingEntities())
{
var ent = db.Entry(model);
ent.State = EntityState.Deleted;
return(db.SaveChanges());
}
}
/// <summary>
/// 删除
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static int Delete(object obj)
{
int effect = -1;
using (WeiQingEntities con = new WeiQingEntities())
{
con.Database.Log = new Action <string>(q => Debug.WriteLine(q));
DbEntityEntry entry = con.Entry(obj);
entry.State = EntityState.Deleted;
effect = con.SaveChanges();
return(effect);
}
}
/// <summary>
/// 批量删除
/// </summary>
/// <param name="objs"></param>
/// <returns></returns>
public static int DeleteMany(IEnumerable <object> objs)
{
int effect = 0;
var et = objs.GetEnumerator();
if (et.MoveNext())
{
Type t = et.Current.GetType();
using (WeiQingEntities con = new WeiQingEntities())
{
con.Database.Log = new Action <string>(q => Debug.WriteLine(q));
foreach (var o in objs)
{
DbEntityEntry entry = con.Entry(o);
entry.State = EntityState.Deleted;
}
effect = con.SaveChanges();
}
}
return(effect);
}
