HOW TO:使用特定物件的索引鍵傳回此物件 HOW TO:在 EntityCollection 中查詢相關物件 HOW TO:排序兩個查詢的聯集 HOW TO:逐頁檢視查詢結果 HOW TO:檢視存放區命令 HOW TO:從 LINQ to Entities 查詢結果中移除重複的項目 HOW TO:使用搭配 In 和 Out 參數的預存程序執行查詢 ...
HOW TO:明確載入相關的物件 (Entity Framework) 發行項 2011/02/28 本文內容 範例 另請參閱 本主題提供的範例將說明如何明確載入相關的物件。第一個範例會在 EntityCollection 上使用 Load,以明確載入單一客戶的所有訂單和項目。 Load 方法無法搭配 POCO 實體一起使用,因為傳回 EntityCollection 不需要 POCO 實體...
HOW TO:從 EntityObject 和 ComplexObject 基底類別繼承 HOW TO:實作自訂資料類別介面 HOW TO:以自訂物件使用物件服務 VB 閱讀英文 儲存 新增至集合 新增至計劃 共用方式為 Facebookx.comLinkedIn電子郵件 列印 發行項 2008/08/21 使用具有 實體資料模型 (EDM) 的自訂資料類別時必須套用 EDM 屬性 (Attribute),...
本主題的範例是根據Adventure Works Sales Model。 若要執行此範例中的程式碼,您必須已經將 AdventureWorks Sales Model 加入到專案中,並設定您的專案使用 Entity Framework。 若要這樣做,請完成HOW TO:手動設定 Entity Framework 專案和HOW TO:以手動方式定義 Entity Data Model (Entity Framework)中的程序。 範例...
Failed to fix the configuration. Please try uninstalling and installing Oracle Developer Tools For Visual Studio. I also encountered the same error message. I fixed the error. Follow the steps below in order. Make sure Visual Studio 2019 is closed. Open “C:\program files (...
I am getting error at mentioned point in my code , error:The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value.Error seems obvious aspersonobject received inside controller has default time-value, and entity framework tries to update ...
I am using Microsoft.EntityFrameworkCore.SqlServer v8.0.4 to run queries against an Azure Synapse SQL database. The SQL generated for a parameter used as the pattern for StartsWith/EndsWith/Contains automagically gets rewritten to escape any wildchars. However, the LIKE keyword's ESCAPE clause...
Is Entity Framework Add Really Slow? In fact, the Add method is not slow at all. Adding an entity to a list cannot be that slow. It's the DetectChanges method invoked inside the Add method which is insanely slow! Using the Add method in a loop is usually a poor practice which impacts...
This topic demonstrates how to use theModel Firstentity model and aDbContextentity container in an XAF application. 本主题演示如何在 XAF 应用程序中使用模型第一实体模型和 DbContext 实体容器。 1. Add the Entity Data Model In theSolution Explorer, right-click theMySolution.Module\BusinessObject...
We could create a script that is passed as a command line argument by Bicep during creation - in which case we need somewhere to put that script. The microservices use Entity Framework so they should take care of the actual seeding of the databases. EF will create the databases...