在这种情况下该怎么办 [英] What to do in this situation

问题描述

我用C语言制作了一个DLL，然后将其添加到Visual Studio的VC ++项目中，这是我的DLL调用返回状态为成功"或错误是什么的方法.

我做了这样的事情

I made an DLL in C sharp and added to my VC++ project in visual studio,a method of my DLL on calling return the status as "success" or what the error is.

I did some thing like this

char *a=interfacepointer->DLL Function

我在变量"a"中获得了垃圾值.
当我通过C#代码对其进行检查时，输出如下所示:-

成功:-

I get the garbage value in variable "a".
When i check it through my C# code the output is like this :-

ON SUCCESS:-

<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">Success</string>

出现错误

ON ERROR

<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">Unknown database 'nhms_temp11'</string>

I should get the Value as "SUCESS" or "Unknown database 'nhms_temp11'"

我该怎么办?

What should i do?

推荐答案

因为char * a是指针，而不是变量.所谓的垃圾"是数据的内存地址.
为了查看该数据，您必须再次取消引用指针. 指针 [

Because char *a is a pointer, not a variable. The "garbage" as you call it is the memory address of your data.
In order to see that data you have to dereference your pointer again. Pointers[^]

这样做

BSTR s1=interfacepointer->DLL Function
std::wcout <<s1<<std::endl ;

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