System.InvalidOperationException:“This MySqlConnection is already in use. See https://fl.vu/mysql-conn-reuse”

时间：2021-08-22 21:15:37 收藏：0 阅读：18

出错

var applicationform = db.ApplicationForm.Where(x => applicationformids.Contains(x.id));
            foreach (var item in applicationform)
            {
    var supply = realNeedApplyList.Single(x => x.applicationformid == item.id);//这里出错
。。。。。
}

解决办法加.ToList()

var applicationform = db.ApplicationForm.Where(x => applicationformids.Contains(x.id));
            foreach (var item in applicationform.ToList())
            {
    var supply = realNeedApplyList.Single(x => x.applicationformid == item.id);//这里出错
。。。。。
}

原文：https://www.cnblogs.com/lunawzh/p/15173246.html