/// <summary>
/// 海量数据插入方法
/// </summary>
/// <typeparam name="db"></typeparam>
/// <param name="list"></param>
public virtual void AddByBulkCopy <T>(DbContext db, List <T> list) where T : class, new()
{
// 让使用typeof(T).Name标签的所有缓存过期
QueryCacheManager.ExpireTag(typeof(T).Name);
AddByBulkCopy((SqlConnection)db.Database.Connection, db.ToDataTable <T>(list), typeof(T).Name);
}