C# 实体框架6共享事务的多个Datacontext

您没有指定上下文是否连接到同一数据库

如果数据库不同，则需要避免

BeginTransaction

和

UseTransaction

并在

TransactionScope

中插入代码

假设它们都连接到同一个数据库，您不会首先指定是使用EDMX还是代码。我在使用EDMX时也遇到了同样的问题，花了一整天的时间反复尝试，最终找到了解决方案

using(var Db = new Framework_DbContext())
{
    var DbContextTransaction = Db.Database.BeginTransaction(IsolationLevel.ReadUncommitted);
    using (var db = new DocumentLibDbContext())
    {
        //**How to use the above DbContextTransaction？？**
        db.Database.UseTransaction(DbContextTransaction.UnderlyingTransaction);
    ｝
}

在分部类中定义额外的构造函数，如下所示：

var workspace = new MetadataWorkspace(new[] { "res://*/" }, new[] { Assembly.GetExecutingAssembly() });
using (var connection = new SqlConnection("data source=.;initial catalog=MultpleEdmxTest;integrated security=True;MultipleActiveResultSets=True"))
{
    using (var entityConnection1 = new EntityConnection(workspace, connection, false))
    {
        using (var entityConnection2 = new EntityConnection(workspace, connection, false))
        {
            connection.Open();
            using (var transaction = connection.BeginTransaction())
            {
                using (var schema1Entities = new Schema1Entities(entityConnection1))
                {
                    schema1Entities.Database.UseTransaction(transaction);
                    // code goes here
                    schema1Entities.SaveChanges();
                }

                using (var schema2Entities = new Schema2Entities(entityConnection2))
                {
                    schema2Entities.Database.UseTransaction(transaction);
                    // code goes here
                    schema2Entities.SaveChanges();
                }
                transaction.Commit();
            }
        }
    }
}

其中false表示您手动打开和关闭连接

作为奖励，您现在只需要在配置中使用一个连接字符串，并且它不包括通常附带的所有无用的EF垃圾（metadata=res://*/blabla）

partial class Schema1Entities
{
    public Schema1Entities(DbConnection connection) : base(connection, false) { }
}