C语言DLL如何接收C# 的Dictionary<string, string>参数
时间: 2023-06-19 07:04:21 浏览: 40
在C#中声明的`Dictionary<string, string>`类型参数可以通过以下步骤传递给C语言的DLL:
1. 定义一个C语言的结构体来存储`Dictionary<string, string>`的键值对,例如:
```c
typedef struct {
char* key;
char* value;
} KeyValuePair;
```
2. 声明一个C语言的函数来接收该结构体的数组作为参数,并定义该函数的导出方式,例如:
```c
#ifdef __cplusplus
extern "C" {
#endif
__declspec(dllexport) void ProcessDictionary(KeyValuePair* pairs, int count);
#ifdef __cplusplus
}
#endif
```
3. 在C#中声明该C语言函数的导入方式,并将`Dictionary<string, string>`转换为C语言结构体数组,例如:
```csharp
[DllImport("mydll.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern void ProcessDictionary(KeyValuePair[] pairs, int count);
public static void CallProcessDictionary(Dictionary<string, string> dict)
{
KeyValuePair[] pairs = new KeyValuePair[dict.Count];
int i = 0;
foreach (KeyValuePair<string, string> kvp in dict)
{
pairs[i].key = kvp.Key;
pairs[i].value = kvp.Value;
i++;
}
ProcessDictionary(pairs, dict.Count);
}
```
4. 在C语言的DLL中实现`ProcessDictionary`函数,并使用`KeyValuePair`数组来访问`Dictionary<string, string>`的键值对,例如:
```c
void ProcessDictionary(KeyValuePair* pairs, int count)
{
for (int i = 0; i < count; i++)
{
printf("Key: %s, Value: %s\n", pairs[i].key, pairs[i].value);
}
}
```