public virtual T Insert <T>(T parm) where T : DBBaseEntity, new()
{
try
{
DBEntityPropertys.GetKeys(typeof(T)).ForEach(o =>
{
if (o.GetValue(parm) == null)
{
throw new DBException("主键不能为空");
}
});
DBContext.Set <T>().Add(parm);
DBContext.SaveChanges();
return(parm);
}
catch (DbEntityValidationException ex)
{
throw ex;
}
}
public virtual T Update <T>(T parm) where T : DBBaseEntity, new()
{
//try
//{
Dictionary <string, object> KeyValues = new Dictionary <string, object>();
DBEntityPropertys.GetKeys(typeof(T)).ForEach(o =>
{
KeyValues.Add(o.Name, o.GetValue(parm));
if (KeyValues[o.Name] == null)
{
throw new DBException("主键不能为空");
}
});
DbEntityEntry <T> entry = DBContext.Entry <T>(parm);
if (entry.State == EntityState.Detached)
{
DBContext.Set <T>().Attach(parm);
}
typeof(T).GetProperties().Where(o => !KeyValues.ContainsKey(o.Name)).ToList().ForEach(o =>
{
if (o.GetValue(parm) != null)
{
entry.Property(o.Name).IsModified = true;
}
});
DBContext.SaveChanges();
return(parm);
//}
// catch(DbEntityValidationException ex)
// {
// throw ex;
// }
}
public virtual int Delete <T>(T parm) where T : DBBaseEntity, new()
{
Dictionary <string, object> KeyValues = new Dictionary <string, object>();
DBEntityPropertys.GetKeys(typeof(T)).ForEach(o =>
{
KeyValues.Add(o.Name, o.GetValue(parm));
if (KeyValues[o.Name] == null)
{
throw new DBException("主键不能为空");
}
});
var where = string.Empty;
if (KeyValues.Count == 0)
{
throw new DBException("没有主键的表无法使用该方法");
}
KeyValues.ToList().ForEach(o =>
{
where += o.Key + "='" + o.Value.ToString() + "' and ";
});
where = where.Remove(where.Length - 4);
var attr = typeof(T).GetCustomAttribute(typeof(TableAttribute));
if (attr == null)
{
throw new DBException(typeof(T).Name + "类未设置TableAttribute");
}
var sql = string.Format("delete from {0} where {1}", (attr as TableAttribute).Name, where);
var seccuess = DBContext.Database.ExecuteSqlCommand(sql);
if (seccuess < 0)
{
throw new DBException("数据未能删除");
}
return(seccuess);
}
public T GetByKey <T>(T parm) where T : DBBaseEntity, new()
{
Dictionary <string, object> KeyValues = new Dictionary <string, object>();
DBEntityPropertys.GetKeys(typeof(T)).ForEach(o =>
{
KeyValues.Add(o.Name, o.GetValue(parm));
if (KeyValues[o.Name] == null)
{
throw new DBException("主键不能为空");
}
});
var where = string.Empty;
if (KeyValues.Count == 0)
{
throw new DBException("没有主键的表无法使用该方法");
}
KeyValues.ToList().ForEach(o =>
{
where += o.Key + "='" + o.Value.ToString() + "' and ";
});
where = where.Remove(where.Length - 4);
return(DBContext.Database.SqlQuery <T>("select * from {0} where {1}", typeof(T).GetType().Name, where).FirstOrDefault());
}
