一个转换过程号角宣言C＃的DllImport [英] Convert a Clarion Procedure Declaration to C# DLLImport
问题描述
我如何转换这种号角过程声明为C＃？这是一个第三方DLL用C写的，这没有什么太大的文档的一部分。我所列举的原型号角的方法是否正常工作。在C＃中，我不知道用什么类型来代替 * CString的。我试图的char [] 像@DanielC建议，但没有奏效。我还发现，号角长是32位的（感谢@ shf301）
号角：
sendRequest将程序（* CString的XDATA，龙DATALEN，龙xTimeout），字节，虚拟
C＃（我已经试过，不工作）：
函数[DllImport（3RD_PARTY_API.dll）]
私人静态外部长sendRequest将（REF串XDATA，诠释DATALEN，诠释xTimeout）;
当我把在C＃中 sendRequest将方法我得到检测标准 PInvokeStackImbalance从错误VS2010。我认为它的参数类型的问题，而不是像字符集或入口点中的的DllImport声明。我真的只是停留在如何转换 * CString的来有效的C＃类型。
我找到了答案。我希望我仍然是谁写的代码，所以我可以大声喝斥开发工作。他们把一个包装周围的API，以便我与3个参数中列出的方法，然后调用无超时值的实际API。该PInvokeStackImbalance例外来自于事实，我是在一个额外的参数添加
下面是实际的号角程序以及这样做的正确的C＃语法：
号角：
sendRequest将程序（* CString的XDATA，龙DATALEN），字节，虚拟
C＃：
函数[DllImport（NOVA_API.dll，入口点=sendRequest将）]
私人静态外部字节sendRequest将（字符串XDATA，诠释DATALEN）;
在总结，克拉里昂 * CString的 CAN转换到.NET 字符串键入dllimport的声明。
非常感谢那些谁回答。下面是我在搜索中使用一个额外的资源，我发现非常有用：的PInvoke .NET
How can I convert this Clarion procedure declaration to C#? It's part of a 3rd Party DLL written in C, which doesn't have much documentation. I have listed the prototype for the method in Clarion that is working correctly. In C#, I'm not sure what type to use to replace *CString. I tried char[] like @DanielC suggested, but it didn't work. I also found that Clarion long is 32-bit (thanks @shf301).
Clarion:
SendRequest Procedure(*CString xData,Long DataLen,Long xTimeout),Byte,Virtual
C# (what I've tried, which doesn't work):
[DllImport("3RD_PARTY_API.dll")]
private static extern long SendRequest(ref string xData, int DataLen, int xTimeout);
When I call the SendRequest method in C# I get the standard PInvokeStackImbalance was detected error from VS2010. I think it's an issue of the parameter types and not something like CharSet or EntryPoint in the DllImport declaration. I'm really just stuck on how to convert *CString to a valid C# type.
I found the answer. I wish I still worked with the developer who wrote this code so I could yell at them. They put a wrapper around the API so that the method I listed with 3 parameters then calls the actual API without the timeout value. The PInvokeStackImbalance exception came from the fact that I was adding in an extra parameter.
Here is the actual Clarion procedure as well as the correct C# syntax for this:
Clarion:
SendRequest Procedure(*CString xData, Long DataLen), Byte, Virtual
C#:
[DllImport("NOVA_API.dll", EntryPoint = "SendRequest")]
private static extern byte SendRequest(string xData, int DataLen);
In summation, the Clarion *CString can be converted to the .NET string type in DLLImport declarations.
Many thanks to those who responded. Here is an additional resource I used in my search, which I found very usefull: pinvoke.net
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