想要覆盖 WCF 中为 EntityType 数据返回的内容

发布于 2024-12-03 01:22:27 字数 1157 浏览 1 评论 0原文

我在模型中定义了一个名为 SessionsOverview 的实体。我通过 WCF 服务公开它，代码如下：

public static void InitializeService(DataServiceConfiguration config)
{
    // Examples:
    config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
    config.SetServiceOperationAccessRule("*", ServiceOperationRights.AllRead);
    config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
}

它在名为 ModelSessionView.Designer.cs 的文件中创建一堆代码。

在该代码中，它当前有一个名为 SessionsOverviews< 的方法。 /code> 返回一个 .net 对象。我想根据一些安全规则覆盖返回的内容。具体来说，我想查看我的 app.config，获取一个设置，如果该设置不正确，我想隐藏此对象中的一些数据。我可以开始更新这个文件，但这似乎是错误的。有一个明确的地方我应该添加这样的逻辑吗？

谢谢

    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    public ObjectSet<SessionsOverview> SessionsOverviews
    {
        get
        {
            if ((_SessionsOverviews == null))
            {
                _SessionsOverviews = 
                  base.CreateObjectSet<SessionsOverview>("SessionsOverviews");
            }
            return _SessionsOverviews;
        }
    }

原文

I've got an entity defined called SessionsOverview in my model. I expose it through a WCF service with code like the following:

public static void InitializeService(DataServiceConfiguration config)
{
    // Examples:
    config.SetEntitySetAccessRule("*", EntitySetRights.AllRead);
    config.SetServiceOperationAccessRule("*", ServiceOperationRights.AllRead);
    config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
}

It creates a bunch of code in a file called ModelSessionView.Designer.cs

In that code, it currently has a method called SessionsOverviews that returns a .net object. I'd like to override what is returned based on some security rules. Specifically, I want to look in my app.config, get a setting, and if that setting is not true, I want to hide some of the data in this object. I could just start updating this file, but that seems wrong. Is there a clear place I should add logic like this?

Thanks

    /// <summary>
    /// No Metadata Documentation available.
    /// </summary>
    public ObjectSet<SessionsOverview> SessionsOverviews
    {
        get
        {
            if ((_SessionsOverviews == null))
            {
                _SessionsOverviews = 
                  base.CreateObjectSet<SessionsOverview>("SessionsOverviews");
            }
            return _SessionsOverviews;
        }
    }

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时光礼记 2024-12-10 01:22:27

您尝试过使用 QueryInterceptor 吗？

这些在服务类上指定并返回一个您可以自己编写的表达式。

一个简单的例子定义如下：

[QueryInterceptor("SessionsOverviews")]
public Expression<Func<SessionsOverview, bool>> SessionsOverviewFilter()
{
    var configValue = readfromconfig;

    if (configValue == "something")
    {
        return (session) => session.thePropertyToFilteron == configValue;
    }

    return (session) => true;
}

此外，您还可以指定 ChangeInterceptors。

有关详细信息，请参阅以下文章

http://msdn.microsoft.com/en-我们/library/dd744842.aspx

Have you tried using QueryInterceptor's?

These get specified on the service class and return an expression that you can write your self.

A simple example is defined below:

[QueryInterceptor("SessionsOverviews")]
public Expression<Func<SessionsOverview, bool>> SessionsOverviewFilter()
{
    var configValue = readfromconfig;

    if (configValue == "something")
    {
        return (session) => session.thePropertyToFilteron == configValue;
    }

    return (session) => true;
}

Additionally you can also specify ChangeInterceptors.

See the following article for further details

http://msdn.microsoft.com/en-us/library/dd744842.aspx

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