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从Excel调用包含WCF Web服务的C＃DLL

[英]Calling C# DLL that contains WCF web service from Excel

原文 2013-05-22 11:22:49 3 1 c#/ wcf/ excel/ com

This question has been asked previously but my circumstances are slightly different. 之前已经问过这个问题，但我的情况略有不同。

I have an Excel add-in that we distribute to our users that now needs to connect to a downstream system. 我有一个Excel加载项，我们分发给我们的用户，现在需要将其连接到下游系统。 That downstream system have provided me a WCF webservice to do this with so I designed a C# DLL wrapper that I could expose through COM that would communicate to the WCF webservice and return the results through a COM interface to Excel. 那个下游系统为我提供了WCF Web服务，因此我设计了一个C＃DLL包装器，可以通过COM公开该包装器，该包装器将与WCF Web服务进行通信并将结果通过COM接口返回给Excel。

I have Excel talking to the COM wrapper fine now, though I have had to revert to Framework 3.5 for the DLL for reasons I have yet to fathom to do with Excel and .NET runtime versions. 我现在让Excel与COM包装程序通信很好，尽管由于我还不了解Excel和.NET运行时版本的原因，我不得不恢复DLL的Framework 3.5。 The problem is that when I call the COM exposed method in the C# DLL I get an error returned saying "Could not find default endpoint..." 问题是，当我在C＃DLL中调用COM公开的方法时，收到一条错误消息，提示“找不到默认端点...”。

This error seems to be because the service configuration is not being picked up, obviously because I have no app.config as this is purely a stand alone DLL. 该错误似乎是由于未获取服务配置，显然是因为我没有app.config，因为这纯粹是一个独立的DLL。 I could put the config in Excel.exe.config I'm sure but that isn't an option as making changes to users Excel configuration will not be allowed. 我可以确定可以将配置放在Excel.exe.config中，但这不是一个选择，因为不允许更改用户的Excel配置。 And I cannot hard code values into the C# code as we will need different environments configurable with an external config file. 而且我无法将值硬编码到C＃代码中，因为我们将需要使用外部配置文件配置的不同环境。

Basically I need to have a config file that I can distribute with my DLL and the excel add in, so that when excel calls my COM exposed C# DLL, it then also picks up the Config file and loads the WCF endpoint configuration from there. 基本上，我需要有一个配置文件，该文件可以随我的DLL和excel加载项一起分发，以便当excel调用我的COM公开的C＃DLL时，它也将拾取配置文件并从那里加载WCF终结点配置。 I know how to read a config file in using ConfigurationManager but I cannot figure out how to let .NET know that this config file contains the EndPoint information for the WCF services. 我知道如何使用ConfigurationManager读取配置文件，但无法弄清楚如何让.NET知道此配置文件包含WCF服务的EndPoint信息。 The only solution I have found so far involves overriding the default app domain configuration loading so that .NET loads your manually specified file for app.config default settings, but all the solutions I have foudn for this online use .NET 4.5 objects and code, when I am limited to .NET 3.5. 到目前为止，我发现的唯一解决方案是覆盖默认的应用程序域配置加载，以便.NET加载您为app.config默认设置手动指定的文件，但是我为此在线提供的所有解决方案都使用.NET 4.5对象和代码，当我仅限于.NET 3.5时。

Can anyone help me with this? 谁能帮我这个？

1 个解决方案

You should consider confugurating your WCF client endpoint in the code rather than in config file. 您应该考虑在代码中而不是在配置文件中配置WCF客户端终结点。 For more details please see: 有关更多详细信息，请参见：

http://msdn.microsoft.com/en-us/library/ff647110.aspx http://msdn.microsoft.com/en-us/library/ff647110.aspx