在c＃中使用vb.net dll。获取“无效参数” [英] Using a vb.net dll in c#. Getting 'invalid argument'

问题描述

有一个奇怪的，我知道这是一个愚蠢的，但我看不到任何东西！

我有一个在VB.net中创建的DLL（不，我不能改变它！:-)），并从C＃调用它。问题出现在C＃中创建对象的位置，我收到的消息是有一些无效的参数。

DLL中的构造函数代码如下：

  Sub新的（ByRef连接作为IConnection）
  

C＃中的代码是：

  IConnection conn = new Connection（）; 
 CustomObject test = new CustomObject（conn）
  

对第一行感到满意，但它在第二行给出错误消息（一些无效参数）。

我还在VB.net中创建了一个二次项目，并调用该DLL，它在那里工作正常。

我做错了什么？

提前感谢

Andy

解决方案

如果参数为ByRef，则在C＃中调用函数时必须指定它

  CustomObject test = new CustomObject（ref conn）; 
  

Got a strange one and I know it is something silly but I can't see it for anything!

I have a DLL created in VB.net (No I can't change it! :-)) and am calling it from C#. The problems come at the point the object is created in C# and I get the message that it has "some invalid arguments".

The constructor code in the DLL is as follows:

Sub New(ByRef Connection As IConnection)

The code in C# is:

IConnection conn = new Connection();  
CustomObject test = new CustomObject(conn)

It is happy with the first line but it gives the error message ("some invalid arguments") on the second line.

I have also created a secondary project in VB.net and called the DLL and it works fine there.

What am I doing wrong?

Thanks in advance,

Andy

解决方案

In C# if a parameter is "ByRef" you have to specify it when you call the function

CustomObject test = new CustomObject(ref conn);

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