獲得來自EF查詢的編號，然後用它來刪除記錄

使用EF我想從點數據庫中刪除用戶......這一切都正常工作與類似的代碼獲得來自EF查詢的編號，然後用它來刪除記錄

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);

我可以使用手動刪除在aspNetUserId有：

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);

和這個作品...所以現在我需要做的是與用戶名得到每一個人aspNetUserId ...所以我試圖像

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);

東西

是這樣的可能嗎？使用EF時設置一個變種，如果不是有其他人就如何解決這個...感謝您的任何答覆

來源

2017-09-07 John

你爲什麼要使用SQL語句時，你已經有一個漂亮的美麗的實體框架庫？ –

我正在處理其他用戶創建的現有代碼，這是我在修復錯誤時遇到的問題...不要拍攝編輯器：P – John

看起來你的選擇查詢任何想法是錯誤的：

Select FROM aspnet_Membership where UserName = userName

應該

Select UserId FROM aspnet_Membership where UserName = userName

因爲您只需要UserId。

另外，你應該使用ExecuteStoreQuery查詢數據庫，就像這樣：

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

那麼當然使用userIdToRemove代替userIdToRemove.UserId

來源

2017-09-07 07:10:48 DenseCrab

獲得來自EF查詢的編號，然後用它來刪除記錄

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