Database.BeginTransaction()有两个重载方法。一个方法提供一个IsolationLevel参数,另一个无参方法使用底层数据库提供程序默认的数据库事务隔离级别。两个重载方法均返回一个DbContextTransaction对象,该对象提供Commit和Rollback方法,用于数据库底层事务的提交和回滚。 使用DbContextTransaction意味着,一旦提交或回滚事务,就要...
sqlCommand.Transaction=sqlTxn; sqlCommand.CommandText=@"UPDATE Blogs SET Rating = 5"+"WHERE Name LIKE '%Entity Framework%'"; sqlCommand.ExecuteNonQuery();using(varcontext =newBloggingContext(conn, contextOwnsConnection:false)) { context.Database.UseTransaction(sqlTxn);varquery = context.Posts.Where(...
I just posted examples on how to use transaction scopes with entity framework on my programming interviews blog. In this post, I cover three cases in which transaction scope is being used to show rollback when an error occurs during an update of multiple entities: when you have multiple save...
Entity Framework 6以前,框架本身并没有提供显式的事务处理方案,在EF6中提供了事务处理的API。 所有版本的EF,只要你调用SaveChanges方法进行插入、修改或删除,EF框架会自动将该操作进行事务包装。这种方法无法对事务进行显式的控制,例如新建事务等,可能会造成事务的粒度非常大,降低效率。EF不会对查询进行事务包装。 从...
It allows the DbContext to use a transaction, which was started outside of the Entity Framework.Lets take a look into the following example where multiple operations are performed in a single transaction. The code is as −class Program { static void Main(string[] args) { using (var ...
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程序集: Microsoft.EntityFrameworkCore.dll 包: Microsoft.EntityFrameworkCore v3.1.0 重载 展开表 ExecuteInTransactionAsync(IExecutionStrategy, Func<Task>, Func<Task<Boolean>>) 在事务中执行指定的异步操作。 允许检查如果提交期间发生错误,事务是否已回滚。 ExecuteInTransactio...
Share DbTransactions and DbConnectionsI hope you’re aware by now that EF always uses a DbTransaction by default for calls made to the database. For example, when calling SaveChanges, a DbTransaction is created before the first command is sent to the database. EF then sends all necessary ...
直接定位transaction时会定位到EFCore中,这个里面我并没有找到对应的显式Rollback操作,但是经过网络上查询,找到了一个源码中实现了自动 Rollback 在System.Data.SqlClient中的SqlInternalTransaction中反编译后,会发现下面的代码 代码语言:javascript 代码运行次数:0 ...
Example This example defines a TransactionScope. The TransactionScope ensures that changes to objects in the object context are coordinated with a message queue. The Entity Framework uses this transaction when it saves changes to the database. When an UpdateException occurs, the operation is retried ...