App.config中的外WCF的ChannelFactory配置？ [英] WCF ChannelFactory configuration outside of App.config?

问题描述

我有一个Windows服务，使得使用一个插件系统。我用下面的代码在插件基类提供每个DLL一个单独的配置（所以它会从 plugin.dll.config 读）：

I've got a Windows Service that makes use of a plugin system. I'm using the following code in the plugin base class to provide a separate configuration per DLL (so it'll read from plugin.dll.config):

string dllPath = Assembly.GetCallingAssembly().Location;
return ConfigurationManager.OpenExeConfiguration(dllPath);

这些插件需要对WCF服务调用，所以我跑入的问题是，新的ChannelFactory<>（endPointName）只查找托管应用程序的App.config中的端点配置

These plugins need to make calls to WCF services, so the problem I'm running into is that new ChannelFactory<>("endPointName") only looks in the hosted application's App.config for the endpoint configuration.

有没有办法简单地告诉的ChannelFactory在其他配置文件看或以某种方式注入我配置对象？

Is there a way to simply tell the ChannelFactory to look in another configuration file or somehow inject my Configuration object?

我能想到的唯一办法的办法，这是手动创建一个端点，绑定对象从值从 plugin.dll.config 阅读并把它们传递给的ChannelFactory化合物的一;> 重载。这确实似乎是，虽然重新发明轮子，它可能会带来麻烦与端点，使大量使用的行为和有约束力的配置。 或许有通过传递一个配置部分很容易地创建终端和对象绑定的方式？

The only way I can think of to approach this is to manually create an EndPoint and Binding object from values read in from plugin.dll.config and pass them to one of the ChannelFactory<> overloads. This really seems like recreating the wheel though, and it could get really messy with an endPoint that makes heavy use of behavior and binding configurations. Perhaps there's a way to create EndPoint and Binding objects easily by passing it a configuration section?

推荐答案

有2个选项。

选项1.使用频道。

如果您正在使用渠道直接合作，.NET 4.0和.NET 4.5拥有的 ConfigurationChannelFactory 。 看起来像这样在 MSDN的例子

If you are working with channels directly, .NET 4.0 and .NET 4.5 has the ConfigurationChannelFactory. The example on MSDN looks like this:

ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();
fileMap.ExeConfigFilename = "Test.config";
Configuration newConfiguration = ConfigurationManager.OpenMappedExeConfiguration(
    fileMap,
    ConfigurationUserLevel.None);

ConfigurationChannelFactory<ICalculatorChannel> factory1 = 
    new ConfigurationChannelFactory<ICalculatorChannel>(
        "endpoint1", 
        newConfiguration, 
        new EndpointAddress("http://localhost:8000/servicemodelsamples/service"));
ICalculatorChannel client1 = factory1.CreateChannel();

正如兰登指出的那样，你可以通过简单地传递null，则使用配置文件中的端点地址，像这样的：

As pointed out by Langdon, you can use the endpoint address from the configuration file by simply passing in null, like this:

var factory1 = new ConfigurationChannelFactory<ICalculatorChannel>(
        "endpoint1", 
        newConfiguration, 
        null);
ICalculatorChannel client1 = factory1.CreateChannel();

这是在MSDN的文档。

选项2.代理工作。

如果您正在使用的代码生成的代理工作，就可以读取配置文件并加载的 ServiceModelSectionGroup 。有参与比单纯使用更多的工作在 ConfigurationChannelFactory ，但至少你可以继续使用生成的代理（即引擎盖下使用的ChannelFactory 和管理 IChannelFactory 为您服务。

If you're working with code-generated proxies, you can read the config file and load a ServiceModelSectionGroup. There is a bit more work involved than simply using the ConfigurationChannelFactory but at least you can continue using the generated proxy (that under the hood uses a ChannelFactory and manages the IChannelFactory for you.

巴勃罗Cibraro显示了这样一个很好的例子在这里：的获取WCF绑定和行为从任何配置源

Pablo Cibraro shows a nice example of this here: Getting WCF Bindings and Behaviors from any config source

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