c# - 如何使用代码迁移配置禁用延迟加载，Entity Framework 4.1

Question

这是我用来配置数据库的代码:

 internal sealed class Configuration : DbMigrationsConfiguration<DataStore>
{
    public Configuration()
    {
        AutomaticMigrationsEnabled = true;
        SetSqlGenerator("System.Data.SqlServerCe.4.0", new SqlCeModelColumnBugWorkaroundProvider());

    }

    protected override void OnSeed(DbContext context)
    {
       context.Configuration.LazyLoadingEnabled = false;
       new SeedData(context as DataStore);
    }

    public static void DoDatabaseInitialisation()
    {
        var setting = ConfigurationManager.AppSettings["RequiresDbUpdate"];
        var requiresDbUpdate = bool.Parse(string.IsNullOrEmpty(setting) ? "false" : setting);

        if (! requiresDbUpdate) return;

        //otherwise create/update the database 
        var dbMigrator = new DbMigrator(new Configuration());
        dbMigrator.Update();

        ResetDbUpdateRequired("/");
    }

    private static void ResetDbUpdateRequired(string appPath)
    {
        var hostName = WebHelper.GetHost(false);

        if (!hostName.Contains("localhost"))
            WebHelper.UpdateWebConfigAppSetting("RequiresDbUpdate", "false", appPath);
    }

如果有人知道如何做到这一点，请告诉我。我还在模型类上尝试过非虚拟属性，但这似乎没有任何区别。

Answer 1

我一直用

context.Configuration.LazyLoadingEnabled = false;

在使用 DbContext 方法之前调用它，等效的设置是这样的:

(context as IObjectContextAdapter).ObjectContext.ContextOptions.LazyLoadingEnabled = false;