C# 複製 public static string DuplicateKey (object? keyProperties, object? entityType, object? duplicateEntityType); 參數 keyProperties Object entityType Object duplicateEntityType Object 傳回 String 適用於 產品版本 Entity Framework Core 3.0, 3.1, 5.0, 6.0, 7.0, 8.0, 9.0 在...
key IKey 金鑰。 duplicateKey IKey 另一個索引鍵。 keyName String 唯一條件約束的名稱。 storeObject StoreObjectIdentifier 存放區物件的識別碼。 logger IDiagnosticsLogger<DbLoggerCategory.Model.Validation> 要使用的記錄器。 適用於 Entity Framework Core 9.0 和其他版本 產品版本...
<!--For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468--> </configSections><entityFramework> <defaultConnectionFactorytype="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework"> <parameters> <parametervalue="v13.0"/> <...
Bug #71502EntityFramework Database.BeginTransaction: Nested Transaction are not supported Submitted:28 Jan 2014 17:50Modified:10 Aug 2022 17:21 Reporter:Charles LohEmail Updates: Status:ClosedImpact on me: None Category:Connector / NETSeverity:S1 (Critical) ...
输入实体必须有key属性集,因为当state manager尝试检索entry,它使用它们创建一个EntityKey执行查找。如果entry不包含这个EntityKey,方法就会抛出一个InvalidOperationException异常,附带一条信息:The ObjectStateManager does not contain an ObjectStateEntry with a reference to an object of type ‘type’。
DataLoadOptions Class DBConvert Class DuplicateKeyException Class EntityRef(TEntity) Structure EntityRef(TEntity) Structure EntityRef(TEntity) Constructor EntityRef(TEntity) Methods EntityRef(TEntity) Properties EntityRef(TEntity) Properties Entity Property ...
System.ArgumentException: An item with the same key has already been added. Key: System.Object Item [System.String] at System.Collections.Generic.Dictionary`2.TryInsert(TKey key, TValue value, InsertionBehavior behavior) at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.GetSort...
There really isn't any easy way to turn off this behavior, because LINQ to SQL will throw an InvalidOperationException if you attempt to invoke DeleteOnSubmit without first having called Attach. The Entity Framework, on the other hand, doesn't force you to handle change conflicts when deleting...
org.springframework.dao.DuplicateKeyException: ### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '202207031551464227' for key 'PRIMARY' ### The error may exist in com/midea/mcsp/policy/infrastructure/repo/mapper/gen/PlcCalC...
The Entity Framework throws this exception because it isn’t clear whether the entity you are trying to remove is an existing entity that should be marked for deletion or a new entity that should just be ignored. For this reason, we can’t use just Remove to mark a disconnected entity as...