Question

使用EF我想从Dot数据库中删除一个用户......这一切都适用于像

这样的代码

DbContext.ExecuteStoreCommand("DELETE FROM activeforums_Attachments where UserId = " + userId);
DbContext.ExecuteStoreCommand("DELETE FROM activeforums_Forums_Tracking where UserId = " + userId);
DbContext.ExecuteStoreCommand("DELETE FROM activeforums_Poll where UserId = " + userId);
DbContext.ExecuteStoreCommand("DELETE FROM activeforums_Poll_Results where UserId = " + userId);

我可以使用aspNetUserId手动删除：

 string aspNetUserId = "'21F72BCA-A51P-47DF-B57A-C31A191C61D2'";
    DbContext.ExecuteStoreCommand("DELETE FROM aspnet_Membership where UserId = " + aspNetUserId);
    DbContext.ExecuteStoreCommand("DELETE FROM aspnet_UsersInRoles where UserId = " + aspNetUserId);
    DbContext.ExecuteStoreCommand("DELETE FROM aspnet_Users where UserId = " + aspNetUserId);

这有效...所以现在我需要做的就是从userName获取每个人的aspNetUserId ...所以我正在尝试像

这样的东西

using (DEntities DbContext = DAOHelper.GetObjectContext<DEntities>())
{
var userIdToRemove = DbContext.ExecuteStoreCommand("Select FROM aspnet_Membership where UserName = " + userName);
DbContext.ExecuteStoreCommand("DELETE FROM aspnet_Membership where UserId = " + userIdToRemove.UserId);
DbContext.ExecuteStoreCommand("DELETE FROM aspnet_UsersInRoles where UserId = " + userIdToRemove.UserId);
DbContext.ExecuteStoreCommand("DELETE FROM aspnet_Users where UserId = " + userIdToRemove.UserId);

这样的事情可能吗？在使用EF时设置var，如果没有其他任何想法如何解决这个问题...感谢任何回复

Answer 1

看起来您的选择查询错误：

Select FROM aspnet_Membership where UserName = userName

应该是

Select UserId FROM aspnet_Membership where UserName = userName

因为您只需要UserId。

另外，您应该使用ExecuteStoreQuery来查询数据库，如下所示：

var userIdToRemove = DbContext.ExecuteStoreQuery<string>("Select UserId FROM aspnet_Membership where UserName = " + userName);

然后当然使用userIdToRemove而不是userIdToRemove.UserId

从EF查询中获取ID，然后使用它来删除记录

1 个答案: