在外部程序集中调用方法时加载外部 web.config 变量

发布于 2024-11-01 18:40:48 字数 1110 浏览 0 评论 0原文

我正在使用反射来调用外部程序集中的方法。外部类/方法位于 WCF 数据服务中。

WCF 数据服务使用从 web.config 中的自定义配置部分加载的信息，

 <configSections>
  <section name="myCustomSection" type="MyWcfService.MyCustomSection, MyWcfService" />
 </configSections>

加载配置变量在 wcf 服务中工作正常，但在尝试通过单独的应用程序通过反射调用其方法时则不然。我尝试将配置信息放入本地 app.config 但出现相同的错误。

这是本地应用程序中的代码：

 Assembly assembly = Assembly.LoadFile
            ("C:\\MyProject\\MyWcfService.dll");

        Type[] t = assembly.GetTypes();

        foreach (var v in t)
        {
            if (v.Name == "MyType")
            {
                var instance = Activator.CreateInstance(v); 
                v.InvokeMember("MyMethod", BindingFlags.InvokeMethod, null, instance, null);
            }
        }

这是来自产生错误的外部程序集（wcf 服务）的代码，

   MyCustomSection configSection = ConfigurationManager.GetSection("myCustomSection")
          as MyCustomSection ;

configSection 出现 null - “对象引用未设置到对象的实例”。

我认为，如果它在本地应用程序 app.config 而不是 web.config 中查找，则在本地添加相同的配置信息应该可行。

谢谢。

原文

I am using reflection to invoke a method in an external assembly. The external class / method is in a WCF data service.

The WCF data service uses information loaded from a custom configuration section in the web.config,

 <configSections>
  <section name="myCustomSection" type="MyWcfService.MyCustomSection, MyWcfService" />
 </configSections>

Loading the configuration variables works fine in the wcf service but not when trying to invoke its methods through reflection via a seperate app. I tried putting the configuration information in the local app.config but I get the same error.

This is the code in the local application:

 Assembly assembly = Assembly.LoadFile
            ("C:\\MyProject\\MyWcfService.dll");

        Type[] t = assembly.GetTypes();

        foreach (var v in t)
        {
            if (v.Name == "MyType")
            {
                var instance = Activator.CreateInstance(v); 
                v.InvokeMember("MyMethod", BindingFlags.InvokeMethod, null, instance, null);
            }
        }

And this is the code from the external assembly (wcf service) that is producing the error,

   MyCustomSection configSection = ConfigurationManager.GetSection("myCustomSection")
          as MyCustomSection ;

configSection is coming up null - 'object reference not set to an instance of an object'.

If its looking in the local applications app.config rather than the web.config, adding the same config information locally should work, I would think.

Thanks.

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